:root {
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 40px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --primary: #6366f1;
    --accent: #10b981;
    --bg: #e9eef6;
    --surface: #ffffff;
    --surface-secondary: #f8fafc;
    --surface-tertiary: #eef2f7;
    --surface-muted: #f1f5f9;
    --text: #1e293b;
    --text-muted: #64748b;
    --muted: var(--text-muted);
    --danger: #ef4444;
    --border: rgba(226, 232, 240, 0.95);
    --card-border: var(--border);
    --shadow: rgba(15, 23, 42, 0.08);
    --input-bg: #f8fafc;
    --card-bg: var(--surface);
    --focus-ring: #f59e0b;
}

body.dark-mode {
    --bg: #0b1220;
    --surface: #0f172a;
    --surface-secondary: #111f33;
    --surface-tertiary: #16273f;
    --surface-muted: #1f2a44;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --muted: var(--text-muted);
    --danger: #fda4af;
    --border: rgba(148, 163, 184, 0.24);
    --card-border: var(--border);
    --shadow: rgba(0, 0, 0, 0.45);
    --input-bg: #111f33;
    --card-bg: var(--surface);
    background: linear-gradient(135deg, #020617 0%, var(--bg) 100%);
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatCard {
    from {
        opacity: 0;
        transform: translateY(18px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes panelSlide {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.985);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

* {
    box-sizing: border-box;
}

button,
input,
select,
textarea {
    font: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 3px;
}

button:disabled {
    cursor: wait;
    opacity: 0.6;
}

.toast-region {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 3000;
    display: grid;
    gap: var(--space-2);
    width: min(360px, calc(100vw - 32px));
}

.toast {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: 0 12px 32px var(--shadow);
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 700;
}

.toast-success { border-color: #22c55e; }
.toast-error { border-color: var(--danger); }
.auth-message.info { background: var(--surface-secondary); color: var(--text); }

.feedback-dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 3100;
    display: grid;
    place-items: center;
    padding: var(--space-5);
    background: rgba(15, 23, 42, 0.52);
}

.feedback-dialog {
    width: min(100%, 440px);
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--surface);
    box-shadow: 0 24px 64px rgba(15, 23, 42, 0.25);
}

.feedback-dialog h2 { margin: 0 0 var(--space-2); font-size: 1.25rem; }
.feedback-dialog p { margin: 0 0 var(--space-5); color: var(--muted); line-height: 1.5; }
.feedback-dialog-input { margin: 0 0 var(--space-5); }
.feedback-dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-2); }
.danger-btn { background: var(--danger); color: white; border: 0; border-radius: var(--radius-sm); padding: 12px 16px; cursor: pointer; font-weight: 700; }

.pwa-status,
.pwa-prompt {
    position: fixed;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: calc(100% - 24px);
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 10px 28px var(--shadow);
    font-size: 0.88rem;
    font-weight: 700;
}

.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg);
}

.auth-overlay[hidden] {
    display: none;
}

.auth-card {
    width: min(100%, 440px);
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--card-bg);
    box-shadow: 0 20px 50px var(--shadow);
}

.auth-card h2 {
    margin: 0 0 8px;
}

.auth-description {
    margin: 0 0 18px;
    color: var(--muted);
    line-height: 1.5;
}

.auth-message {
    margin: 12px 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: #fee2e2;
    color: #991b1b;
    font-size: 0.9rem;
}

.auth-message.success {
    background: #dcfce7;
    color: #166534;
}

.auth-actions,
.auth-link {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    font: inherit;
    font-size: 0.88rem;
    text-decoration: underline;
}

.auth-user-label {
    max-width: 180px;
    overflow: hidden;
    color: var(--muted);
    font-size: 0.82rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

body.auth-required > .container,
body.auth-required > #globalSearchOverlay,
body.auth-required > #calendarPopup,

.pwa-status {
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: #fff7ed;
    color: #9a3412;
}

.pwa-status-dot {
    width: 9px;
    height: 9px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #f97316;
}

.pwa-prompt {
    right: 12px;
    bottom: 12px;
    background: var(--surface);
    color: var(--text);
}

.pwa-prompt .secondary-btn {
    margin: 0;
    padding: 7px 12px;
    cursor: pointer;
}

.pwa-install-button {
    display: none;
    border: 1px solid var(--primary);
    border-radius: 10px;
    padding: 8px 12px;
    background: var(--primary);
    color: white;
    cursor: pointer;
    font-weight: 700;
}

body.can-install .pwa-install-button {
    display: inline-block;
}

@media (max-width: 520px) {
    .pwa-status,
    .pwa-prompt {
        left: 12px;
        right: 12px;
        max-width: none;
        transform: none;
    }

    .pwa-prompt {
        justify-content: space-between;
    }
}

.header-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.header-actions button {
    min-height: 40px;
}

@media (max-width: 720px) {
    body { padding: var(--space-2); }
    .container { padding: var(--space-4); border-radius: var(--radius-lg); }
    .hero-card { align-items: flex-start; flex-direction: column; padding: var(--space-5); }
    header { align-items: flex-start; flex-direction: column; }
    .header-actions { width: 100%; }
    .header-actions button { flex: 1 1 auto; }
    .auth-user-label { flex: 1 1 100%; max-width: none; }
    .feedback-dialog { padding: var(--space-5); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.9) 0%, var(--bg) 100%);
    color: var(--text);
    padding: 20px;
    margin: 0;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.container {
    max-width: 1400px;
    width: min(100%, 1400px);
    margin: 0 auto;
    animation: slideUpFade 0.6s ease-out;
    border-radius: 28px;
    padding: 28px;
    background: var(--card-bg);
    box-shadow: 0 16px 48px var(--shadow);
    border: 2px solid var(--card-border);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    gap: 16px;
}

h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.subtitle {
    margin: 4px 0 0;
    color: var(--muted);
}

.settings-link {
    background: transparent;
    border: none;
    color: var(--muted);
    cursor: pointer;
    text-decoration: underline;
    font-size: 0.85rem;
}

.hero-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.eyebrow {
    margin: 0 0 6px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 700;
}

.hero-card h2 {
    margin: 0;
    font-size: 1.2rem;
}

.mobile-nav-shell {
    display: none;
    margin-bottom: 16px;
    padding: 14px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: 0 8px 24px var(--shadow);
}

.mobile-nav-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.mobile-tab-select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    font-weight: 700;
}

.hero-stats {
    display: flex;
    gap: 12px;
}

.hero-stat {
    min-width: 84px;
    padding: 12px;
    border-radius: 16px;
    background: var(--surface-secondary);
    text-align: center;
}

.hero-stat span {
    display: block;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.hero-stat small {
    color: var(--muted);
}

.tab-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    overflow-x: auto;
    padding-bottom: 4px;
}

.tab-btn {
    background: var(--surface-secondary);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 999px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.25s ease;
}

.tab-btn:hover {
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 10px 24px rgba(99, 102, 241, 0.25);
}

.dashboard-panel {
    display: none;
    scroll-margin-top: 112px;
}

.dashboard-panel.active-panel {
    display: block;
    animation: panelSlide 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hub-shell {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.hub-intro {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(16, 185, 129, 0.12));
    border-radius: 24px;
    padding: 22px 24px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}

.hub-intro h3 {
    margin: 0 0 6px;
    font-size: 1.3rem;
}

.hub-intro p {
    margin: 0;
    color: var(--muted);
}

.widget-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    grid-auto-flow: dense;
}

.widget-card {
    grid-column: span 1;
}

.widget-span-2 {
    grid-column: span 2;
}

.widget-span-4 {
    grid-column: 1 / -1;
}

.widget-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 18px;
    background: var(--card-bg);
    box-shadow: 0 12px 30px var(--shadow);
    cursor: pointer;
    text-align: left;
    animation: floatCard 0.6s ease both;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.widget-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
    border-color: rgba(99, 102, 241, 0.3);
}

.widget-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,0.5) 50%, transparent 80%);
    transform: translateX(-120%);
    transition: transform 0.8s ease;
}

.widget-card:hover::before {
    transform: translateX(120%);
}

.widget-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.widget-icon {
    font-size: 1.2rem;
}

.widget-badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted);
    font-weight: 700;
}

.widget-preview {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.widget-preview .mini-date,
.widget-preview .mini-task,
.widget-preview .mini-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
    padding: 7px 10px;
    border-radius: 999px;
    font-size: 0.84rem;
    background: var(--surface-secondary);
    color: var(--text);
}

.widget-preview .mini-task {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    color: var(--primary);
}

.widget-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: var(--muted);
}

.widget-pill {
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--primary);
    color: white;
    font-weight: 700;
}

.widget-grade {
    display: flex;
    align-items: center;
    gap: 10px;
}

.widget-ring {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: conic-gradient(var(--accent) 0deg, var(--accent) 300deg, #e2e8f0 300deg);
    display: grid;
    place-items: center;
    box-shadow: inset 0 0 0 6px white;
}

.widget-ring span {
    font-size: 0.83rem;
    font-weight: 800;
    color: var(--accent);
}

.widget-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.widget-list .mini-chip {
    background: var(--surface-secondary);
    color: var(--text);
}

.widget-notes {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.widget-notes .notes-line {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.4;
}

.widget-advisor,
.widget-assignments,
.widget-flashcards {
    min-height: 170px;
}

/* Focus widget tiny tweaks */
.widget-focus .widget-preview .mini-task { background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08)); color: var(--primary); }
.widget-focus .widget-top .widget-badge { color: var(--primary); }

/* Risk badges */
.risk { padding:6px 8px; border-radius:8px; font-weight:700; text-transform:uppercase; font-size:0.75rem; }
.risk.low { background:#dcfce7; color: #03543f; }
.risk.medium { background:#fffbeb; color:#92400e; }
.risk.high { background:#fee2e2; color:#991b1b; }

.predictor-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 12px;
}

.course-prediction-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
}

.course-prediction-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 12px;
}

.status-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 10px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.78rem;
}

.status-tag.on-track { background: #dcfce7; color: #166534; }
.status-tag.slight-risk { background: #fffbeb; color: #92400e; }
.status-tag.at-risk { background: #fee2e2; color: #991b1b; }
.status-tag.no-target { background: var(--surface-secondary); color: var(--text-muted); }

.insight-list {
    display: grid;
    gap: 10px;
}

@media (max-width: 920px) {
    .predictor-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .widget-grid {
        grid-template-columns: 1fr;
    }
}

/* Academic health widget */
.widget-academic .widget-preview .mini-chip { background: linear-gradient(135deg, rgba(16,185,129,0.08), rgba(99,102,241,0.08)); color: var(--primary); }
.widget-academic .widget-top .widget-badge { color: var(--primary); }

/* Trend bars */
.trend-bar { width:40px; display:flex; flex-direction:column; align-items:center; gap:6px; }
.trend-bar .bar { width:100%; background: linear-gradient(180deg,var(--primary),var(--accent)); border-radius:6px; }
.trend-bar .bar-label { font-size:0.75rem; color:var(--muted); margin-top:6px; }

.achievement { padding:8px 10px; background: var(--surface-secondary); border-radius:8px; margin-bottom:6px; }

.settings-grid {
    display: block;
}

.settings-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 16px;
    align-items: start;
}

.settings-column {
    display: grid;
    gap: 16px;
}

.settings-card {
    padding: 18px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
}

.settings-card h4 {
    margin-top: 0;
    margin-bottom: 12px;
}

.goals-layout .panel-card {
    margin-bottom: 0;
}

.goals-layout .card {
    background: var(--surface-secondary);
    border-radius: 16px;
    padding: 14px;
}

.goals-layout .panel-form {
    margin-bottom: 0;
}

.goals-layout .settings-card,
.settings-right .settings-card {
    height: fit-content;
}

.settings-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.settings-actions button {
    width: 100%;
}

.settings-health-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(120px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.settings-health-grid div {
    background: var(--surface-secondary);
    border-radius: 14px;
    padding: 12px;
    text-align: center;
}

.settings-health-grid div strong {
    display: block;
    font-size: 1.4rem;
    color: var(--primary);
}

.radio-group {
    display: flex;
    gap: 12px;
    flex-direction: column;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text);
}

.notification-list, .achievement-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.health-row { display:flex; justify-content:space-between; align-items:center; padding:8px 0; border-bottom:1px solid var(--border); }

.onboarding-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.onboarding-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    max-width: 420px;
}

.logo-icon { font-size: 3rem; margin-bottom: 10px; }

.input-group { margin: 20px 0; text-align: left; }

input, select, textarea {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    font-size: 1rem;
    margin-top: 5px;
    font-family: inherit;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.start-btn, .panel-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
}

.setup-section {
    display: flex; gap: 10px; margin-bottom: 25px; flex-wrap: wrap;
}

.setup-section input {
    flex: 1;
    min-width: 180px;
    border-radius: 12px;
    border: 2px solid var(--border);
    padding: 12px;
    transition: border-color 0.3s ease;
}

.setup-section input:focus {
    outline: none;
    border-color: var(--primary);
}

.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 24px;
    margin-bottom: 25px;
    box-shadow: 0 10px 25px -5px var(--shadow);
    opacity: 0;
    animation: slideUpFade 0.5s ease forwards;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h2 {
    margin: 0;
    color: var(--primary);
    font-size: 1.4rem;
}

.unit-badge {
    font-size: 0.7rem;
    background: var(--surface-secondary);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 8px;
    text-transform: uppercase;
}

.stats-grid {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat {
    flex: 1;
    min-width: 160px;
    background: var(--surface-secondary);
    padding: 15px;
    border-radius: 12px;
}

.stat label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: bold;
}

.stat .val {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
}

.inline-input {
    width: 60px;
    font-size: 1.2rem;
    font-weight: bold;
    border: none;
    background: transparent;
    color: var(--primary);
    border-bottom: 2px solid transparent;
    transition: border-bottom 0.2s ease;
}

.inline-input:focus {
    outline: none;
    border-bottom: 2px solid var(--primary);
}

.needed-box {
    background: var(--surface-secondary);
    color: var(--primary);
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 20px;
}

.needed-box.danger {
    background: #fee2e2;
    color: #b91c1c;
}

.range-projection {
    background: var(--surface-secondary);
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid var(--muted);
}

.range-projection label {
    font-size: 0.7rem;
    font-weight: 800;
    color: #64748b;
    text-transform: uppercase;
    display: block;
    margin-bottom: 5px;
}

.range-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #334155;
    gap: 10px;
    flex-wrap: wrap;
}

.grade-list, .resource-list, .task-list {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.grade-row, .resource-item, .task-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 14px;
    border-bottom: 1px dashed var(--border);
    transition: background 0.2s ease;
    border-radius: 8px;
    align-items: center;
    gap: 10px;
}

.grade-row:hover, .resource-item:hover, .task-item:hover {
    background: var(--surface-secondary);
}

.add-grade-zone {
    display: flex;
    gap: 8px;
    background: var(--surface-secondary);
    padding: 12px;
    border-radius: 12px;
    flex-wrap: wrap;
}

.add-grade-zone input, .add-grade-zone select {
    width: 100%;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}

.add-grade-zone input:focus, .add-grade-zone select:focus {
    outline: none;
    border-color: var(--primary);
}

button {
    cursor: pointer;
    border: none;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.2s ease;
}

button:active {
    transform: scale(0.94);
}

button:hover {
    filter: brightness(1.1);
}

.setup-section button {
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
}

.add-grade-zone button {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    padding: 0 15px;
}

.delete-btn, .mini-del, .task-action, .resource-action {
    background: transparent;
    color: var(--danger);
    font-size: 0.85rem;
}

.mini-del, .task-action, .resource-action {
    background: #fee2e2;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px var(--shadow);
    flex-wrap: wrap;
}

.control-group {
    flex: 1;
    min-width: 180px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.control-group label {
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

select {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
}

.gpa-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 10px 15px rgba(0,0,0,0.05);
    text-align: center;
    margin-bottom: 25px;
    border-bottom: 4px solid var(--primary);
}

.gpa-card label {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    opacity: 0.8;
}

.gpa-val { font-size: 3.5rem; font-weight: 800; color: var(--primary); }

.card.finalized {
    border: 2px solid var(--accent);
    background: var(--surface-secondary);
}

.badge {
    background: var(--accent);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-left: 10px;
    vertical-align: middle;
}

.final-display {
    text-align: center;
    padding: 20px;
    animation: slideUpFade 0.4s ease;
}

.final-display strong {
    font-size: 3rem;
    color: var(--accent);
    display: block;
}

.secondary-btn {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    margin-top: 10px;
    padding: 5px 15px;
}

.finalize-toggle-btn {
    width: 100%;
    margin-top: 15px;
    background: transparent;
    color: var(--muted);
    border: 1px dashed var(--border);
    font-size: 0.8rem;
    padding: 10px;
}

.finalize-toggle-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--surface-secondary);
}

.finalize-confirm-zone {
    margin-top: 15px;
    padding: 15px;
    background: var(--surface-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    animation: slideUpFade 0.3s ease;
}

.finalize-confirm-zone label {
    font-size: 0.75rem;
    font-weight: bold;
    color: #64748b;
    display: block;
    margin-bottom: 8px;
}

.finalize-row {
    display: flex;
    gap: 10px;
}

.confirm-btn {
    flex: 1;
    background: var(--accent);
    color: white;
}

.panel-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.weekly-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 18px;
}

.weekly-stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 18px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.comparison-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 16px;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
}

.weekly-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 18px;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
}

.weekly-goals-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.weekly-goal-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    background: var(--surface-secondary);
    padding: 12px 14px;
    border-radius: 14px;
}

.weekly-report-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--surface-secondary);
    padding: 18px;
    border-radius: 20px;
}

.report-score {
    font-size: 2.75rem;
    font-weight: 900;
    color: var(--primary);
    min-width: 100px;
    text-align: center;
}

.progress-bar {
    background: var(--surface-secondary);
    border-radius: 999px;
    overflow: hidden;
    height: 12px;
}

.progress-fill {
background: linear-gradient(135deg, var(--primary), var(--accent));
height: 100%;
width: 0;
transition: width 0.4s ease;
}

@media (max-width: 860px) {
.weekly-summary-grid,
.comparison-grid {
    grid-template-columns: 1fr;
}
}

/* Courses grid and cards */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.course-card {
    text-align: left;
    padding: 14px;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

.course-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

@media (max-width: 900px) {
    .course-detail-grid { grid-template-columns: 1fr; }
}

.course-detail-grid .panel-card h3 { margin-top: 0; }

.course-detail-grid .resource-list img { max-width: 100%; border-radius: 8px; }

/* small helper tweaks to keep consistent look */
.course-card strong { display:block; font-size:1.03rem; }
.course-card small { color: var(--muted); }

/* Study Center styles */
.study-grid { display:flex; gap:16px; flex-wrap:wrap; }
.study-timer-card { flex: 1 1 380px; }
.study-analytics-card { flex: 2 1 520px; }

.study-mode-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.study-custom-input {
    width: 120px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
}

.study-timer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.study-timer-display {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    min-width: 112px;
}

.study-timer-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.study-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.study-stat-card {
    min-width: 0;
}

.study-stat-value {
    font-weight: 800;
    font-size: 1.5rem;
    min-width: 0;
    word-break: break-word;
}

.study-stat-copy {
    font-weight: 800;
    font-size: 1rem;
    min-width: 0;
    word-break: break-word;
}

.study-charts {
    margin-top: 16px;
}

.study-chart-grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.study-chart-card {
    flex: 1 1 220px;
    min-width: 0;
}

.study-bar-chart {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
    overflow-x: auto;
    padding-bottom: 4px;
}

.study-top-course {
    font-weight: 800;
}

.study-course-breakdown {
    margin-top: 8px;
    display: grid;
    gap: 6px;
}

.study-insights {
    margin-top: 12px;
    color: var(--muted);
}

.calendar-day-view {
    margin-bottom: 24px;
    display: grid;
    gap: 16px;
}

.calendar-day-hero {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.calendar-day-hero h3 {
    margin: 0;
}

.calendar-day-hero-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.calendar-day-list {
    display: grid;
    gap: 10px;
}

.stat.card { background: var(--surface-secondary); padding:12px; border-radius:10px; text-align:center; }

@media (max-width:900px) {
    .study-grid { flex-direction:column; }
}

.panel-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.panel-heading h3 {
    margin: 0;
    font-size: 1.2rem;
}

.panel-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.helper-text {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.file-input-label {
    display: block;
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 10px;
    background: var(--surface-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    font-weight: 600;
    color: var(--text);
}

.file-input-label:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.15);
}

.file-input-label .file-label-text {
    display: block;
}

.upload-input {
    display: none;
}

.resource-attachment {
    margin-top: 8px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--surface-secondary);
}

.resource-attachment img {
    display: block;
    width: 100%;
    max-height: 220px;
    object-fit: cover;
}

.resource-link {
    display: block;
    padding: 10px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.outline-preview {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.timeline-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08));
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 14px;
}

.timeline-card strong {
    display: block;
    margin-bottom: 4px;
}

.outline-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
}

.outline-card strong {
    display: block;
    margin-bottom: 8px;
}

.outline-chip {
    display: inline-block;
    margin: 4px 6px 0 0;
    padding: 4px 8px;
    border-radius: 999px;
    background: var(--surface-secondary);
    color: var(--text);
    font-size: 0.85rem;
}

.resource-item strong, .task-item strong {
    display: block;
    margin-bottom: 4px;
}

.resource-item p, .task-item p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.empty-state {
    padding: 14px;
    background: var(--surface-secondary);
    color: var(--muted);
    border-radius: 10px;
    border: 1px dashed var(--border);
}

.task-item.done {
    opacity: 0.75;
}

.outline-breakdown {
    margin-bottom: 12px;
    padding: 12px;
    background: var(--surface-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.outline-breakdown label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
}

.outline-breakdown .empty-state {
    display: block;
    margin: 0;
    padding: 10px 12px;
    line-height: 1.4;
}

.notes-textarea {
    min-height: 220px;
}

.grade-chat-card {
    margin-top: 1.5rem;
    padding: 1.4rem;
    border-radius: 28px;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: 0 28px 80px rgba(15, 23, 42, 0.10);
    animation: floatIn 0.65s ease backwards;
    color: var(--text);
}

.chat-window {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 320px;
    overflow-y: auto;
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 20px;
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    animation: fadeInUp 0.6s ease backwards;
}

.chat-message {
    max-width: 100%;
    line-height: 1.6;
    padding: 0.95rem 1rem;
    border-radius: 20px;
    font-size: 0.95rem;
    background: var(--surface-secondary);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    animation: popIn 0.3s ease backwards;
}

.chat-message.bot {
    align-self: flex-start;
    background: #eef2f7;
    border: 1px solid #d7dee8;
    color: #0f172a;
}

.chat-message.user {
    align-self: flex-end;
    background: linear-gradient(135deg, #60a5fa, #2563eb);
    color: white;
}

.chat-input-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
    margin-top: 1rem;
}

.chat-input-row input {
    min-width: 0;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    padding: 0.95rem 1rem;
    font-size: 0.95rem;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.chat-input-row input::placeholder {
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-input-row input:focus {
    outline: none;
    border-color: rgba(96, 165, 250, 0.55);
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.12);
    transform: translateY(-1px);
}

.chat-send-btn {
    border-radius: 18px;
    padding: 0.95rem 1.4rem;
    border: none;
    background: linear-gradient(135deg, #60a5fa, #2563eb);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-send-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 22px rgba(37, 99, 235, 0.28);
}

.chat-send-btn:active {
    transform: translateY(0);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes floatIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.countdown-widget {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(16, 185, 129, 0.12));
    border-radius: 24px;
    padding: 24px;
    margin-bottom: 20px;
    position: relative;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), 0 8px 24px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.countdown-display {
    flex: 1;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.countdown-item {
    text-align: center;
    animation: countdownSlideIn 0.5s ease-out;
    width: 100%;
}

.countdown-label {
    margin: 0 0 8px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--muted);
    font-weight: 700;
}

.countdown-days {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
    line-height: 1;
    animation: countdownBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.carousel-arrow {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid rgba(99, 102, 241, 0.3);
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.carousel-arrow:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

.carousel-arrow:active {
    transform: scale(0.95);
}

.carousel-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
}

#countdownDots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
}

#countdownDots .dot.active {
    background: var(--primary);
    width: 24px;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

@keyframes countdownSlideIn {
    from {
        opacity: 0;
        transform: translateX(20px) rotateY(90deg);
    }
    to {
        opacity: 1;
        transform: translateX(0) rotateY(0deg);
    }
}

@keyframes countdownBounce {
    0% {
        transform: scale(0.3);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

.calendar-nav {
    display: flex;
    gap: 8px;
}

.view-toggle {
    display: flex;
    gap: 4px;
    border-radius: 8px;
    background: #f1f5f9;
    padding: 4px;
}

.view-toggle-btn {
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.view-toggle-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.view-toggle-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.calendar-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.full-width-card {
    /* Keep the card aligned with the main container. The calendar grid should span the available width cleanly. */
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding-left: 28px;
    padding-right: 28px;
    border-radius: 24px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
}

.calendar-nav-btn {
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.calendar-nav-btn:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.calendar-nav-btn.today {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
}

.calendar-month-view {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    animation: slideUpFade 0.5s ease-out;
    width: 100%;
    max-width: 100%;
    min-height: 360px;
    box-sizing: border-box;
    justify-items: stretch;
}

.calendar-day-header {
    text-align: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.calendar-day {
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    padding: 16px;
    min-height: 120px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

.calendar-day:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.15);
    transform: translateY(-2px);
}

.calendar-day.other-month {
    background: #f8fafc;
    color: #cbd5e1;
}

.calendar-day.today-highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08));
    border: 2px solid var(--primary);
}

.calendar-day-number {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 8px;
}

.calendar-day.other-month .calendar-day-number {
    color: #cbd5e1;
}

.calendar-day.today-highlight .calendar-day-number {
    color: var(--primary);
}

.calendar-events {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
}

.calendar-event-label {
    display: block;
    width: 100%;
    padding: 5px 8px;
    border-radius: 8px;
    background: var(--surface-secondary);
    color: var(--text);
    border-left: 3px solid var(--primary);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: normal;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.calendar-event-label.final { border-left-color: #ef4444; }
.calendar-event-label.midterm { border-left-color: #f59e0b; }
.calendar-event-label.exam { border-left-color: #8b5cf6; }
.calendar-event-label.more {
    border-left-style: dashed;
    color: var(--muted);
}

.calendar-event-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    flex-shrink: 0;
}

.calendar-event-dot.task {
    background: #3b82f6;
}

.calendar-event-dot.final {
    background: #ef4444;
}

.calendar-event-dot.midterm {
    background: #f59e0b;
}

.calendar-event-dot.exam {
    background: #8b5cf6;
}

.calendar-events-list {
    background: #f8fafc;
    border-radius: 14px;
    padding: 16px;
    border: 1px solid var(--border);
}

.calendar-event-item.task,
.calendar-event-item.goal,
.calendar-event-item.outline,
.calendar-event-item.note {
    word-break: break-word;
}

.calendar-events-list h4 {
    margin: 0 0 12px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.calendar-event-item {
    background: white;
    padding: 12px 14px;
    border-radius: 10px;
    border-left: 4px solid var(--primary);
    margin-bottom: 10px;
    animation: slideUpFade 0.3s ease-out;
}

.calendar-event-item.final {
    border-left-color: #ef4444;
}

.calendar-event-item.midterm {
    border-left-color: #f59e0b;
}

.calendar-event-item.exam {
    border-left-color: #8b5cf6;
}

.calendar-event-item strong {
    display: block;
    margin-bottom: 4px;
}

.calendar-event-item small {
    color: var(--muted);
    font-size: 0.85rem;
}

@media (max-width: 700px) {
    .calendar-month-view {
        gap: 4px;
    }

    .calendar-day {
        min-height: 80px;
        padding: 8px;
    }

    .calendar-day-number {
        font-size: 0.95rem;
    }
}

.calendar-week-view {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    animation: slideUpFade 0.5s ease-out;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    justify-items: stretch;
}

.calendar-timeline-view {
    margin-bottom: 24px;
}

.calendar-timeline-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.timeline-column {
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
}

.timeline-column h4 {
    margin: 0 0 12px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.calendar-week-day {
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    background: var(--card-bg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.2s ease;
    min-height: 220px;
    cursor: pointer;
    width: 100%;
    box-sizing: border-box;
}

.calendar-week-day-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.calendar-week-day:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.15);
    transform: translateY(-2px);
}

.calendar-week-day.other-week {
    background: #f8fafc;
    opacity: 0.6;
}

.calendar-week-day.today-highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08));
    border: 2px solid var(--primary);
}

.calendar-week-day-number {
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 12px;
}

.calendar-week-day.other-week .calendar-week-day-number {
    color: #cbd5e1;
}

.calendar-week-day.today-highlight .calendar-week-day-number {
    color: var(--primary);
}

.calendar-week-events {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-grow: 1;
}

.calendar-week-event {
    background: #f1f5f9;
    padding: 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    border-left: 3px solid var(--primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.calendar-week-event.final {
    border-left-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

.calendar-week-event.midterm {
    border-left-color: #f59e0b;
    background: rgba(245, 158, 11, 0.05);
}

.calendar-week-event.exam {
    border-left-color: #8b5cf6;
    background: rgba(139, 92, 246, 0.05);
}

@media (max-width: 700px) {
    body { padding: 12px; }
    .hero-card { flex-direction: column; align-items: flex-start; }
    .hero-stats { width: 100%; }
    .hero-stat { flex: 1; }
    .setup-section { flex-direction: column; }
}

.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.55);
    z-index: 1100;
    padding: 20px;
}

.modal-card {
    width: 100%;
    max-width: 520px;
    border-radius: 24px;
    background: white;
    padding: 24px;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
    animation: slideUpFade 0.4s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 18px;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.modal-body {
    display: grid;
    gap: 14px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-row label {
    font-size: 0.8rem;
    font-weight: 700;
    color: #475569;
}

.popup-time-fields {
    display: none;
}

.hidden {
    display: none !important;
}

.calendar-event-time {
    display: block;
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 4px;
}

body.dark-mode .container,
body.dark-mode .hero-card,
body.dark-mode .widget-card,
body.dark-mode .panel-card,
body.dark-mode .settings-card,
body.dark-mode .modal-card,
body.dark-mode .gpa-card,
body.dark-mode .course-card,
body.dark-mode .stat,
body.dark-mode .course-prediction-card,
body.dark-mode .calendar-day,
body.dark-mode .calendar-week-day,
body.dark-mode .calendar-events-list,
body.dark-mode .calendar-event-item,
body.dark-mode .timeline-column,
body.dark-mode .outline-card,
body.dark-mode .empty-state,
body.dark-mode .achievement,
body.dark-mode .resource-item,
body.dark-mode .task-item,
body.dark-mode .timeline-card,
body.dark-mode .card,
body.dark-mode .range-projection,
body.dark-mode .view-controls,
body.dark-mode .chat-window,
body.dark-mode .chat-message,
body.dark-mode .weekly-card,
body.dark-mode .weekly-stat-card,
body.dark-mode .comparison-card {
    color: var(--text);
}

body.dark-mode .subtitle,
body.dark-mode .settings-link,
body.dark-mode .notes-line,
body.dark-mode .helper-text,
body.dark-mode .resource-item p,
body.dark-mode .task-item p,
body.dark-mode .course-card small,
body.dark-mode .stat label,
body.dark-mode .unit-badge,
body.dark-mode .range-bar,
body.dark-mode .calendar-event-item small,
body.dark-mode .calendar-events-list h4,
body.dark-mode .calendar-day-header,
body.dark-mode .calendar-week-day-label,
body.dark-mode .calendar-week-event,
body.dark-mode .calendar-event-time,
body.dark-mode .timeline-column h4,
body.dark-mode .mobile-nav-label,
body.dark-mode .achievement-list,
body.dark-mode .notification-list {
    color: var(--muted);
}

body.dark-mode .course-card strong,
body.dark-mode .card-header h2,
body.dark-mode .final-display strong,
body.dark-mode .gpa-val,
body.dark-mode .settings-health-grid div strong,
body.dark-mode .stat .val,
body.dark-mode .calendar-day-number,
body.dark-mode .calendar-week-day-number,
body.dark-mode .calendar-event-item strong,
body.dark-mode .course-prediction-card strong,
body.dark-mode .panel-heading h3,
body.dark-mode .panel-heading p,
body.dark-mode .widget-badge,
body.dark-mode .widget-footer,
body.dark-mode .widget-preview .mini-task,
body.dark-mode .widget-preview .mini-date,
body.dark-mode .widget-preview .mini-chip {
    color: var(--text);
}

body.dark-mode .calendar-day,
body.dark-mode .calendar-week-day,
body.dark-mode .calendar-events-list,
body.dark-mode .calendar-event-item,
body.dark-mode .timeline-column {
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .calendar-day.other-month,
body.dark-mode .calendar-week-day.other-week {
    background: rgba(15, 23, 42, 0.72);
    color: rgba(148, 163, 184, 0.55);
    opacity: 0.7;
}

body.dark-mode .calendar-day.other-month .calendar-day-number,
body.dark-mode .calendar-week-day.other-week .calendar-week-day-number {
    color: rgba(148, 163, 184, 0.55);
}

body.dark-mode .calendar-day,
body.dark-mode .calendar-week-day,
body.dark-mode .calendar-event-item,
body.dark-mode .timeline-column,
body.dark-mode .calendar-events-list {
    background: rgba(15, 23, 42, 0.88);
}

body.dark-mode .calendar-event-label {
    background: rgba(30, 41, 59, 0.95);
    color: var(--text);
    border-left-color: rgba(99, 102, 241, 0.8);
}

body.dark-mode .calendar-event-label.more {
    color: var(--text-muted);
}

body.dark-mode .grade-chat-card {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.92));
    border-color: rgba(148, 163, 184, 0.18);
    color: #e5e7eb;
}

body.dark-mode .chat-message.bot {
    background: #111827;
    color: #e5e7eb;
    border-color: rgba(148, 163, 184, 0.18);
}

body.dark-mode .chat-message.user {
    color: #ffffff;
}

body.dark-mode .course-card,
body.dark-mode .course-prediction-card,
body.dark-mode .settings-card,
body.dark-mode .gpa-card,
body.dark-mode .panel-card,
body.dark-mode .stat,
body.dark-mode .achievement,
body.dark-mode .resource-item,
body.dark-mode .task-item,
body.dark-mode .timeline-card,
body.dark-mode .range-projection,
body.dark-mode .card,
body.dark-mode .outline-card,
body.dark-mode .empty-state,
body.dark-mode .view-controls,
body.dark-mode .calendar-event-item,
body.dark-mode .calendar-events-list,
body.dark-mode .calendar-day,
body.dark-mode .calendar-week-day,
body.dark-mode .timeline-column {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

body.dark-mode .course-card strong,
body.dark-mode .course-card small,
body.dark-mode .card-header h2,
body.dark-mode .card-header .badge,
body.dark-mode .course-card .notes-line,
body.dark-mode .course-card .helper-text,
body.dark-mode .course-card .unit-badge {
    color: #e5e7eb;
}

body.dark-mode .course-card small,
body.dark-mode .unit-badge,
body.dark-mode .card-header .badge {
    color: #9ca3af;
}

body.dark-mode .course-card,
body.dark-mode .panel-card,
body.dark-mode .settings-card,
body.dark-mode .course-prediction-card,
body.dark-mode .calendar-day,
body.dark-mode .calendar-week-day,
body.dark-mode .calendar-event-item,
body.dark-mode .timeline-column,
body.dark-mode .range-projection,
body.dark-mode .stat,
body.dark-mode .gpa-card {
    border-color: rgba(255, 255, 255, 0.15);
}

@media (max-width: 1100px) {
    .widget-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .widget-span-4,
    .widget-span-2 {
        grid-column: span 1;
    }

    .settings-layout,
    .calendar-timeline-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .container {
        padding: 18px;
        border-radius: 22px;
    }

    header {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .header-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .header-actions button {
        width: 100%;
    }

    .tab-nav {
        display: none;
    }

    .mobile-nav-shell {
        display: block;
    }

    .hero-card {
        padding: 18px;
    }

    .hero-card h2 {
        font-size: 1.05rem;
    }

    .hero-stats {
        width: 100%;
        flex-wrap: wrap;
    }

    .widget-grid {
        grid-template-columns: 1fr;
    }

    .widget-span-4,
    .widget-span-2,
    .widget-span-1 {
        grid-column: span 1;
    }

    .widget-card {
        min-height: auto;
    }

    .grade-chat-card {
        margin-top: 1rem;
        padding: 1rem;
    }

    .chat-window {
        padding: 0.75rem;
        max-height: none;
    }

    .chat-message {
        padding: 0.85rem 0.9rem;
        font-size: 0.92rem;
    }

    .chat-input-row {
        grid-template-columns: 1fr;
    }

    .chat-input-row input {
        font-size: 16px;
    }

    .grade-chat-card + #classesContainer {
        margin-top: 16px;
    }

    #classesContainer {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .panel-heading {
        flex-direction: column;
        align-items: flex-start;
    }

    .calendar-controls {
        width: 100%;
    }

    .calendar-month-view,
    .calendar-week-view,
    .calendar-timeline-grid,
    .settings-layout,
    .course-detail-grid,
    .predictor-grid {
        grid-template-columns: 1fr;
    }

    .calendar-day,
    .calendar-week-day {
        min-height: 100px;
        padding: 10px;
    }

    .calendar-event-label {
        font-size: 0.68rem;
        -webkit-line-clamp: 3;
    }

    .calendar-day-hero {
        padding: 16px;
    }

    .calendar-day-hero-actions {
        width: 100%;
    }

    .study-timer-row {
        align-items: stretch;
    }

    .study-timer-display {
        font-size: 1.75rem;
    }

    .study-timer-actions {
        width: 100%;
    }

    .study-timer-actions .panel-btn,
    .study-timer-actions .secondary-btn,
    .study-mode-row .view-toggle-btn {
        flex: 1 1 auto;
    }

    .study-custom-input {
        width: 100%;
        min-width: 0;
        flex: 1 1 100%;
    }

    .study-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .study-chart-grid {
        gap: 12px;
    }

    .study-bar-chart {
        gap: 8px;
    }

    .settings-layout {
        gap: 12px;
    }

    .settings-card {
        padding: 14px;
    }

    .settings-health-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .stats-grid {
        gap: 12px;
    }

    .stat {
        min-width: 0;
        flex: 1 1 calc(50% - 12px);
    }
}

@media (max-width: 520px) {
    .hero-stat,
    .stat {
        flex: 1 1 100%;
    }

    .header-actions {
        grid-template-columns: 1fr;
    }

    .settings-health-grid {
        grid-template-columns: 1fr;
    }
}