:root {
    --dodger-blue: #1e90ff;
    --dodger-blue-dark: #1565c0;
    --dodger-blue-light: #e6f2ff;
    --dodger-blue-glow: rgba(30, 144, 255, 0.25);

    --bg-primary: #f0f4f9;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.88);
    --border-color: #e2e8f0;
    --border-focus: #1e90ff;

    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;

    --accent-blue: #1e90ff;
    --accent-indigo: #2563eb;
    --accent-cyan: #0284c7;
    --accent-emerald: #10b981;
    --accent-amber: #d97706;
    --accent-rose: #e11d48;

    --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    --shadow-glow: 0 0 25px rgba(30, 144, 255, 0.25);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 9999px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    min-height: 100vh;
    padding: 24px 16px;
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(30, 144, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(2, 132, 199, 0.06) 0%, transparent 45%);
    background-attachment: fixed;
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Floating Search Header (Dodger Blue & White Theme) */
.search-header {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: 0 8px 30px rgba(30, 144, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    background-color: #ffffff;
    padding: 2px;
}

.header-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.search-bar-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.search-input-group {
    position: relative;
    flex: 1;
    min-width: 280px;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    width: 20px;
    height: 20px;
    color: var(--dodger-blue);
    pointer-events: none;
}

.search-input-group input {
    width: 100%;
    height: 48px;
    padding: 0 110px 0 44px;
    background: #ffffff;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 500;
    outline: none;
    transition: all 0.2s ease;
}

.search-input-group input:focus {
    border-color: var(--dodger-blue);
    box-shadow: 0 0 0 4px rgba(30, 144, 255, 0.15);
}

.btn-primary {
    position: absolute;
    right: 6px;
    height: 36px;
    padding: 0 18px;
    background: linear-gradient(135deg, #1e90ff, #0066cc);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.3);
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn-primary:hover {
    opacity: 0.92;
    transform: translateY(-1px);
}

/* Autocomplete Dropdown */
.autocomplete-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    max-height: 240px;
    overflow-y: auto;
    z-index: 100;
}

.autocomplete-dropdown.hidden {
    display: none;
}

.autocomplete-item {
    padding: 12px 16px;
    font-size: 0.9rem;
    color: var(--text-main);
    cursor: pointer;
    border-bottom: 1px solid #f1f5f9;
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover {
    background: var(--dodger-blue-light);
    color: var(--dodger-blue-dark);
}

/* Filter Controls */
.filter-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.select-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.week-add-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.select-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.select-group select {
    height: 40px;
    padding: 0 12px;
    background: #ffffff;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 0.88rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.select-group select:focus {
    border-color: var(--dodger-blue);
}

/* Toggle Switch */
.toggle-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

.toggle-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--dodger-blue);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #cbd5e1;
    transition: .3s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
}

input:checked + .slider {
    background: linear-gradient(135deg, #1e90ff, #0066cc);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Quick Chips */
.quick-professors {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding-top: 4px;
    border-top: 1px dashed var(--border-color);
}

.quick-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 600;
}

.chip-btn {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.chip-btn:hover, .chip-btn.active {
    background: var(--dodger-blue-light);
    border-color: var(--dodger-blue);
    color: var(--dodger-blue-dark);
}

/* Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.stats-bar.hidden {
    display: none;
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    border-top: 3.5px solid var(--dodger-blue);
}

.stat-number {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
}

.stat-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 0;
    gap: 16px;
    color: var(--text-muted);
}

.loading-state.hidden {
    display: none;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3.5px solid rgba(30, 144, 255, 0.2);
    border-top-color: var(--dodger-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Schedule Cards Grid (Weekly Layout) */
.schedule-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.week-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.week-card:hover {
    border-color: rgba(30, 144, 255, 0.4);
    box-shadow: 0 8px 25px rgba(30, 144, 255, 0.12);
}

.week-header {
    background: linear-gradient(90deg, #1e90ff, #0066cc);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #ffffff;
}

.week-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.week-card.current-week {
    border: 2.5px solid var(--dodger-blue);
    box-shadow: 0 0 25px rgba(30, 144, 255, 0.3);
}

.week-badge {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-weight: 700;
    backdrop-filter: blur(4px);
}

.week-badge.current-tag {
    background: #ffffff;
    color: var(--dodger-blue-dark);
    font-weight: 800;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 5px rgba(255, 255, 255, 0.5); }
    100% { box-shadow: 0 0 15px rgba(255, 255, 255, 0.9); }
}

.week-meta {
    font-size: 0.85rem;
    color: #e6f2ff;
    font-weight: 600;
}

.days-grid {
    display: flex;
    flex-direction: column;
    divide-y: 1px solid var(--border-color);
    padding: 12px 0;
    background: #ffffff;
}

.day-block {
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.day-block:not(:last-child) {
    border-bottom: 1px solid #f1f5f9;
}

.day-header-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dodger-blue-dark);
    display: flex;
    align-items: center;
    gap: 12px;
}

.day-date {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.sessions-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 14px;
}

.session-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-left: 4px solid var(--dodger-blue);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.session-card:hover {
    background: #ffffff;
    box-shadow: 0 6px 20px rgba(30, 144, 255, 0.1);
    transform: translateY(-2px);
}

.session-card.status-bu {
    border-left-color: var(--accent-amber);
}

.session-card.status-nghi {
    border-left-color: var(--accent-rose);
}

.session-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.time-badge {
    background: var(--dodger-blue-light);
    color: var(--dodger-blue-dark);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
}

.status-badge.normal {
    background: rgba(16, 185, 129, 0.12);
    color: #047857;
}

.status-badge.bu {
    background: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

.status-badge.nghi {
    background: rgba(225, 29, 72, 0.12);
    color: #be123c;
}

.subject-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.3;
}

.subject-code {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.session-details {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.84rem;
    color: var(--text-muted);
    padding-top: 6px;
    border-top: 1px dashed #e2e8f0;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.detail-item strong {
    color: var(--text-main);
}

.empty-week-notice {
    padding: 30px;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.no-data-msg {
    text-align: center;
    padding: 60px 20px;
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
    color: var(--text-muted);
    font-size: 1rem;
}

@media (max-width: 640px) {
    body {
        padding: 12px 8px;
    }

    .app-container {
        gap: 16px;
    }

    .search-header {
        padding: 14px 14px;
        gap: 12px;
    }

    .search-bar-wrapper {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .search-input-group input {
        height: 42px;
        font-size: 0.88rem;
        padding-right: 90px;
    }

    .btn-primary {
        height: 32px;
        padding: 0 14px;
        font-size: 0.82rem;
    }

    .filter-controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .select-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .select-group select {
        width: 100%;
        height: 36px;
        font-size: 0.82rem;
    }

    .toggle-group {
        grid-column: span 2;
        margin-left: 0;
        justify-content: flex-start;
        padding-top: 4px;
    }

    /* Mobile 1-Row Horizontal Stats Bar */
    .stats-bar {
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 6px;
    }

    .stat-card {
        flex: 1;
        min-width: 0;
        padding: 8px 6px;
        border-top-width: 3px;
        gap: 2px;
        text-align: center;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
    }

    .stat-number {
        font-size: 0.92rem;
        font-weight: 800;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

    .stat-title {
        font-size: 0.65rem;
        font-weight: 600;
        line-height: 1.1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }

    .week-header {
        padding: 12px 14px;
    }

    .week-title {
        font-size: 0.92rem;
    }

    .day-block {
        padding: 12px 14px;
    }

    .sessions-list {
        grid-template-columns: 1fr;
    }
}

/* Button Thêm Lịch Cá Nhân */
.btn-add-personal {
    height: 40px;
    padding: 0 16px;
    background: linear-gradient(135deg, #1e90ff, #0066cc);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.86rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 14px rgba(30, 144, 255, 0.3);
    transition: all 0.2s ease;
}

.btn-add-personal:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(30, 144, 255, 0.45);
    background: linear-gradient(135deg, #0077ee, #0052cc);
}

.btn-add-personal svg {
    flex-shrink: 0;
}

/* Session Card Status: Personal Schedule (Square Top-Right CN Corner Badge) */
.session-card.status-personal {
    position: relative;
    overflow: hidden;
    border-left-color: #0284c7;
    background: #f4f9ff;
}

.session-card.status-personal .session-top {
    padding-right: 36px;
}

.cn-corner-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: linear-gradient(135deg, #0284c7, #0369a1);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 3px 9px;
    border-bottom-left-radius: 7px;
    border-top-right-radius: calc(var(--radius-md) - 1px);
    letter-spacing: 0.05em;
    box-shadow: -1px 2px 6px rgba(2, 132, 199, 0.25);
    z-index: 2;
    line-height: 1.3;
}

.status-badge.personal {
    background: #e0f2fe;
    color: #0369a1;
    border: 1px solid #7dd3fc;
}

/* Modal UI Components */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease-out;
}

.modal-overlay.hidden {
    display: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-container {
    background: #ffffff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { transform: translateY(20px) scale(0.97); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

.modal-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.6rem;
    color: var(--text-dim);
    cursor: pointer;
    line-height: 1;
    padding: 0 6px;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.modal-close:hover {
    color: var(--text-main);
    background: #e2e8f0;
}

.modal-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.required-star {
    color: var(--accent-rose);
}

.form-control {
    width: 100%;
    height: 42px;
    padding: 0 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
    background: #ffffff;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    border-color: var(--dodger-blue);
    box-shadow: 0 0 0 3px rgba(30, 144, 255, 0.15);
}

.form-control[readonly] {
    background: #f1f5f9;
    color: #475569;
    cursor: not-allowed;
    border-color: #cbd5e1;
    font-weight: 600;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--border-color);
    margin-top: 8px;
}

.btn-secondary {
    height: 40px;
    padding: 0 18px;
    background: #f1f5f9;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-secondary:hover {
    background: #e2e8f0;
    color: var(--text-main);
}

.btn-primary-modal {
    height: 40px;
    padding: 0 20px;
    background: linear-gradient(135deg, #1e90ff, #0066cc);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(30, 144, 255, 0.35);
    transition: all 0.15s ease;
}

.btn-primary-modal:hover {
    opacity: 0.95;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(30, 144, 255, 0.45);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .modal-container {
        max-height: 95vh;
    }

    .btn-add-personal {
        height: 36px;
        padding: 0 8px;
        font-size: 0.78rem;
        grid-column: span 1;
        align-self: flex-end;
        justify-content: center;
        width: 100%;
        white-space: nowrap;
    }
}

/* Session Card Actions & Delete Button */
.session-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-delete-personal {
    background: rgba(225, 29, 72, 0.08);
    color: var(--accent-rose);
    border: 1.5px solid rgba(225, 29, 72, 0.2);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.btn-delete-personal:hover {
    background: var(--accent-rose);
    color: #ffffff;
    border-color: var(--accent-rose);
    box-shadow: 0 3px 10px rgba(225, 29, 72, 0.3);
    transform: translateY(-1px);
}

.btn-delete-personal svg {
    flex-shrink: 0;
}

/* Modal Confirmation Styling */
.modal-container.modal-sm {
    max-width: 440px;
}

.modal-header.header-danger {
    background: #fff5f5;
    border-bottom-color: #fecdd3;
}

.modal-header.header-danger .modal-title {
    color: #be123c;
}

.confirm-msg {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.4;
}

.confirm-submsg {
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-top: 6px;
}

.btn-danger-modal {
    height: 40px;
    padding: 0 18px;
    background: linear-gradient(135deg, #e11d48, #be123c);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(225, 29, 72, 0.35);
    transition: all 0.15s ease;
}

.btn-danger-modal:hover {
    opacity: 0.95;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(225, 29, 72, 0.45);
}

/* Upcoming Nearest Session Notification Modal Popup */
.modal-container.modal-notice {
    max-width: 500px;
    padding: 0;
    overflow: hidden;
}

.modal-header.header-notice {
    background: linear-gradient(135deg, #f0f7ff, #e6f7ff);
    border-bottom: 1px solid #bae0ff;
    padding: 14px 18px;
}

.modal-container.is-personal-notice .modal-header.header-notice {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    border-bottom: 1px solid #7dd3fc;
}

.upcoming-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.upcoming-pulse-dot {
    width: 9px;
    height: 9px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: livePulse 1.8s infinite;
}

@keyframes livePulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.upcoming-time-tag {
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--dodger-blue-dark);
    background: #ffffff;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    border: 1px solid #91caff;
    white-space: nowrap;
}

.modal-container.is-personal-notice .upcoming-time-tag {
    color: #0369a1;
    border-color: #7dd3fc;
    background: #ffffff;
}

.upcoming-popup-body {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.upcoming-main-info {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.upcoming-date-box {
    background: linear-gradient(135deg, #1e90ff, #0066cc);
    color: #ffffff;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 90px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.25);
}

.modal-container.is-personal-notice .upcoming-date-box {
    background: linear-gradient(135deg, #0284c7, #0369a1);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.upcoming-date-box .day-name {
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.upcoming-date-box .full-date {
    font-size: 0.82rem;
    font-weight: 600;
    opacity: 0.95;
}

.upcoming-details-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.upcoming-subject-title {
    font-size: 1.02rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.35;
}

.upcoming-meta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
    font-size: 0.83rem;
    color: var(--text-muted);
}

.upcoming-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.upcoming-meta-item strong {
    color: var(--text-main);
}

.upcoming-note-line {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: #f8fafc;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border-color);
    margin-top: 4px;
    word-break: break-word;
}

.upcoming-popup-footer {
    padding: 12px 20px;
    background: #f8fafc;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.btn-sm-modal {
    height: 36px;
    padding: 0 18px;
    font-size: 0.84rem;
}

@media (max-width: 640px) {
    .modal-container.modal-notice {
        width: 92%;
        max-width: 380px;
        border-radius: var(--radius-md);
    }
    
    .modal-header.header-notice {
        padding: 12px 14px;
    }

    .modal-header.header-notice .modal-title {
        font-size: 0.92rem;
    }
    
    .upcoming-header-actions {
        gap: 6px;
    }

    .upcoming-time-tag {
        font-size: 0.7rem;
        padding: 2px 7px;
    }
    
    .upcoming-popup-body {
        padding: 14px 16px;
    }

    .upcoming-main-info {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    
    .upcoming-date-box {
        flex-direction: row;
        justify-content: space-between;
        padding: 8px 12px;
        min-width: auto;
    }

    .upcoming-subject-title {
        font-size: 0.95rem;
    }

    .upcoming-meta-row {
        gap: 6px 10px;
        font-size: 0.78rem;
    }

    .upcoming-popup-footer {
        padding: 10px 16px;
    }
}

/* Today Day Block Highlight & Tag */
.day-today-tag {
    background: linear-gradient(135deg, #ef4444, #f59e0b);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
    margin-left: 6px;
    letter-spacing: 0.02em;
}

.day-block.is-today-block {
    background: rgba(254, 243, 199, 0.35);
    border-left: 4px solid var(--accent-amber);
    border-radius: var(--radius-sm);
}

/* Button Add Personal & Notification Toggle */
.btn-add-personal {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 40px;
    padding: 0 14px;
    background: #ffffff;
    border: 1.5px solid var(--dodger-blue);
    border-radius: var(--radius-sm);
    color: var(--dodger-blue);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-add-personal:hover {
    background: var(--dodger-blue-light);
    transform: translateY(-1px);
}

/* Notification Controls Group & Settings */
.noti-controls-group {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-direction: row;
    flex-wrap: nowrap;
}

.btn-noti-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 40px;
    padding: 0 14px;
    background: #ffffff;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn-noti-toggle:hover {
    border-color: var(--dodger-blue);
    color: var(--dodger-blue-dark);
    background: var(--dodger-blue-light);
}

.btn-noti-toggle.active {
    background: linear-gradient(135deg, #10b981, #059669);
    border-color: #059669;
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-noti-toggle.active .noti-icon {
    display: inline-block;
    animation: bellRing 2s infinite ease-in-out;
}

.btn-noti-toggle.denied {
    background: #fef2f2;
    border-color: #f87171;
    color: #dc2626;
}

.select-noti-time {
    height: 40px;
    padding: 0 10px;
    background: #ffffff;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.select-noti-time:hover, .select-noti-time:focus {
    border-color: var(--dodger-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 144, 255, 0.15);
}

.btn-test-noti {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 40px;
    padding: 0 12px;
    background: #f8fafc;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-test-noti:hover {
    background: #e2e8f0;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

@keyframes bellRing {
    0%, 100% { transform: rotate(0); }
    10% { transform: rotate(18deg); }
    20% { transform: rotate(-18deg); }
    30% { transform: rotate(12deg); }
    40% { transform: rotate(-12deg); }
    50% { transform: rotate(0); }
}

/* Floating Toast Notification System */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    max-width: 360px;
    width: calc(100% - 32px);
}

.toast-item {
    pointer-events: auto;
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
    border-left: 4px solid var(--dodger-blue);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.88rem;
    color: var(--text-main);
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-item.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-item.toast-success {
    border-left-color: var(--accent-emerald);
}

.toast-item.toast-warning {
    border-left-color: var(--accent-amber);
}

.toast-item.toast-danger {
    border-left-color: var(--accent-rose);
}

.toast-icon {
    font-size: 1.2rem;
    line-height: 1;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toast-title {
    font-weight: 700;
    color: var(--text-main);
    font-size: 0.9rem;
}

.toast-msg {
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.35;
}

/* =========================================================================
   RESPONSIVE DESIGN FOR MOBILE PHONES (iOS Safari & Android Chrome)
   ========================================================================= */

@media (max-width: 768px) {
    body {
        padding: 12px 10px;
    }

    .app-container {
        gap: 14px;
    }

    /* Floating Search Header */
    .search-header {
        padding: 14px 14px;
        border-radius: var(--radius-md);
        gap: 12px;
    }

    .header-brand {
        gap: 10px;
    }

    .header-logo {
        width: 32px;
        height: 32px;
    }

    .header-title {
        font-size: 1.02rem;
    }

    .search-bar-wrapper {
        gap: 10px;
        flex-direction: column;
        align-items: stretch;
    }

    .search-input-group {
        width: 100%;
        min-width: 100%;
    }

    .search-input-group input {
        height: 44px;
        padding: 0 90px 0 40px;
        font-size: 0.88rem;
    }

    .btn-primary {
        right: 4px;
        height: 36px;
        padding: 0 14px;
        font-size: 0.82rem;
    }

    /* Filter Controls Grid on Mobile */
    .filter-controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        width: 100%;
    }

    .select-group {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 3px;
        width: 100%;
    }

    .select-group label {
        font-size: 0.75rem;
    }

    .select-group select {
        width: 100%;
        height: 38px;
        font-size: 0.82rem;
        padding: 0 8px;
    }

    .btn-add-personal {
        height: 38px;
        font-size: 0.85rem;
        white-space: nowrap;
        justify-content: center;
        width: 100%;
    }

    .week-add-group {
        grid-column: span 2;
        width: 100%;
        display: flex;
        flex-direction: row;
        align-items: flex-end;
        gap: 8px;
    }

    .week-add-group .select-group {
        flex: 1;
    }

    .week-add-group .btn-add-personal {
        flex: 1.2;
    }

    /* Both notification buttons placed side-by-side on 1 row on mobile */
    .noti-controls-group {
        grid-column: span 2;
        width: 100%;
        display: flex;
        flex-direction: row;
        gap: 8px;
    }

    .btn-noti-toggle {
        flex: 1 1 50%;
        min-width: 0;
        justify-content: center;
        height: 38px;
        font-size: 0.8rem;
        padding: 0 6px;
        white-space: nowrap;
    }

    .toggle-group {
        grid-column: span 2;
        width: 100%;
        margin-left: 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: #ffffff;
        padding: 8px 12px;
        border-radius: var(--radius-sm);
        border: 1.5px solid var(--border-color);
    }

    /* Quick Chips */
    .quick-professors {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 4px;
        gap: 6px;
        -webkit-overflow-scrolling: touch;
    }

    .quick-label {
        font-size: 0.75rem;
        white-space: nowrap;
    }

    .chip-btn {
        padding: 5px 12px;
        font-size: 0.78rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* Stats Bar */
    .stats-bar {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .stat-card {
        padding: 10px 14px;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .stat-number {
        font-size: 1.05rem;
    }

    .stat-title {
        font-size: 0.78rem;
    }

    /* Week Cards & Day Blocks */
    .week-card {
        border-radius: var(--radius-md);
    }

    .week-header {
        padding: 12px 14px;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .week-title {
        font-size: 0.95rem;
        flex-wrap: wrap;
        gap: 6px;
    }

    .week-date-range {
        font-size: 0.82rem;
    }

    .week-meta {
        font-size: 0.78rem;
    }

    .day-block {
        padding: 12px 12px;
        gap: 8px;
    }

    .day-header-title {
        font-size: 0.88rem;
        gap: 8px;
    }

    .day-date {
        font-size: 0.78rem;
    }

    /* Sessions Cards */
    .sessions-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .session-card {
        padding: 12px;
        border-radius: var(--radius-sm);
    }

    .session-top {
        flex-wrap: wrap;
        gap: 6px;
    }

    .subject-title {
        font-size: 0.92rem;
    }

    .session-details {
        grid-template-columns: 1fr 1fr;
        gap: 6px 10px;
        font-size: 0.78rem;
    }

    /* Modals & Forms */
    .modal-container {
        width: 94%;
        max-width: 420px;
        padding: 16px;
        border-radius: var(--radius-md);
    }

    .modal-header {
        padding: 12px 14px;
    }

    .modal-title {
        font-size: 1rem;
    }

    .modal-body {
        padding: 14px 16px;
        gap: 12px;
    }

    .form-row {
        flex-direction: column;
        gap: 10px;
    }

    .form-control {
        height: 40px;
        font-size: 0.88rem;
    }

    .modal-footer {
        padding: 12px 16px;
        gap: 8px;
    }

    /* Toasts on mobile */
    .toast-container {
        left: 12px;
        right: 12px;
        bottom: 16px;
        max-width: none;
        width: auto;
    }

    .toast-item {
        padding: 12px 14px;
        font-size: 0.82rem;
    }
}

@media (max-width: 480px) {
    .filter-controls {
        grid-template-columns: 1fr 1fr;
    }

    .select-group {
        grid-column: span 1;
    }

    .btn-add-personal, .noti-controls-group, .toggle-group {
        grid-column: span 2;
    }

    .session-details {
        grid-template-columns: 1fr;
    }
}