/* ==========================================================================
   STUDYVERSE - INTERACTIVE SCHEDULE DASHBOARD STYLES
   Shared styles loaded via <link href="/shared.css"> in create.html
   ========================================================================== */

body {
    animation: fadeIn 0.4s ease forwards;
}

/* --- MAIN CONTAINER LAYOUT --- */
.main-schedule {
    padding-top: 135px;
    padding-bottom: 50px;
    min-height: 100vh;
}

.container-fluid {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- BANNER --- */
.schedule-banner {
    background: var(--card-bg);
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    padding: 24px 32px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    box-shadow: var(--white-glow);
}

.banner-title h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-white), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 12px;
}

.banner-title p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-top: 4px;
}

.banner-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* --- BUTTONS --- */
.btn-action {
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.88rem;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.25s ease;
}

.btn-action:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.btn-ai {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

.btn-export {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-soft);
    color: var(--text-white);
}

.btn-export:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--border-highlight);
}

.btn-danger {
    background: rgba(255, 59, 48, 0.15);
    border: 1px solid rgba(255, 59, 48, 0.3);
    color: #ff6b6b;
}

.btn-danger:hover {
    background: #ff3b30;
    color: white;
    box-shadow: 0 4px 15px rgba(255, 59, 48, 0.4);
}

/* --- WORKSPACE LAYOUT (2 COLUMNS) --- */
.schedule-workspace {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

/* --- SIDEBAR --- */
.sidebar-panel {
    width: 360px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-card {
    background: var(--card-bg);
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    padding: 20px;
    box-shadow: var(--white-glow);
}

.panel-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-white);
}

.panel-card h3 i {
    color: var(--primary-blue);
}

/* --- FORM ADD SUBJECT --- */
.add-subject-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.form-group.row-group {
    flex-direction: row;
    gap: 12px;
}

.form-group.row-group > div {
    flex: 1;
}

label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

input[type="text"], input[type="number"] {
    width: 100%;
    background: var(--card-hover-bg);
    border: 1px solid var(--border-soft);
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--text-white);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s;
}

input[type="text"]:focus, input[type="number"]:focus {
    border-color: var(--primary-blue);
    background: var(--card-bg);
    box-shadow: 0 0 0 3px var(--primary-blue-glow);
}

input[type="text"]::placeholder {
    color: var(--text-muted);
}

/* --- COLOR PICKER --- */
.color-picker-wrapper {
    width: 100%;
    height: 38px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-soft);
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
}

input[type="color"] {
    width: 100%;
    height: 100%;
    border: none;
    background: none;
    cursor: pointer;
}

/* --- PRESET COLORS --- */
.preset-colors {
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
}

.color-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    border: 2px solid transparent;
}

.color-dot:hover {
    transform: scale(1.15);
}

.color-dot.active {
    border-color: #ffffff;
    box-shadow: 0 0 8px rgba(255,255,255,0.6);
}

.btn-add {
    width: 100%;
    padding: 12px;
    background: var(--primary-blue);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    margin-top: 4px;
    transition: all 0.2s;
    box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.3);
}

.btn-add:hover {
    filter: brightness(1.12);
    transform: translateY(-1px);
}

/* --- DRAG HINT --- */
.drag-hint {
    font-size: 0.8rem;
    color: var(--text-gray);
    margin-bottom: 12px;
    line-height: 1.4;
    background: rgba(var(--primary-rgb), 0.06);
    border-left: 3px solid var(--primary-blue);
    padding: 8px 10px;
    border-radius: 0 8px 8px 0;
}

/* --- SUBJECT CARDS (DRAGGABLE) --- */
.subjects-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 4px;
}

.subjects-list::-webkit-scrollbar {
    width: 5px;
}
.subjects-list::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
}

.subject-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-soft);
    cursor: grab;
    user-select: none;
    transition: all 0.2s ease;
}

.subject-card:hover {
    border-color: var(--border-highlight);
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(3px);
}

.subject-card.dragging {
    opacity: 0.4;
    cursor: grabbing;
    transform: scale(0.96);
}

.subject-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.subject-color-tag {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.subject-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: white;
}

.subject-count {
    font-size: 0.76rem;
    color: var(--text-gray);
    font-weight: 500;
}

.subject-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-remove-subject {
    background: rgba(255, 59, 48, 0.15);
    border: 1px solid rgba(255, 59, 48, 0.3);
    color: #ff8080;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
    padding: 0;
}

.btn-remove-subject:hover {
    background: #ff3b30;
    color: white;
}

/* --- STATS BOX --- */
.status-box {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-gray);
}

/* --- MAIN TIMETABLE SECTION --- */
.timetable-section {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.timetable-toolbar {
    background: var(--card-bg);
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--text-gray);
}

.timetable-legend {
    display: flex;
    gap: 16px;
    align-items: center;
}

.timetable-legend div {
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-box {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    display: inline-block;
}

.legend-box.subject-legend { background: var(--primary-blue); }
.legend-box.x-legend { background: rgba(255, 59, 48, 0.3); border: 1px solid #ff3b30; }
.legend-box.off-legend { background: repeating-linear-gradient(45deg, #181d28, #181d28 8px, #0e121a 8px, #0e121a 16px); }

/* --- TIMETABLE TABLE --- */
.timetable-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* momentum scroll trên iOS */
    border-radius: 20px;
    border: 1px solid var(--border-soft);
    background: var(--card-bg);
    box-shadow: var(--white-glow);
}

.timetable {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.85rem;
    min-width: 850px;
}

.timetable th, .timetable td {
    border-bottom: 1px solid var(--border-soft);
    border-right: 1px solid var(--border-soft);
    padding: 14px 10px;
    text-align: center;
    vertical-align: middle;
}

.timetable th:last-child, .timetable td:last-child {
    border-right: none;
}

.timetable th {
    background: var(--card-hover-bg);
    color: var(--text-white);
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    position: sticky;
    top: 0;
    z-index: 10;
    transition: background 0.2s;
}

.timetable th:hover {
    background: var(--primary-blue);
    color: white;
}

.timetable td {
    background: var(--card-bg);
    color: var(--text-gray);
    cursor: pointer;
    height: 54px;
    transition: all 0.18s ease;
    position: relative;
}

.timetable td:hover:not(.disabled-day) {
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--text-white);
}

.timetable td.time-cell {
    background: var(--card-hover-bg);
    color: var(--text-white);
    font-weight: 500;
    font-size: 0.82em;
    white-space: nowrap;
}

.timetable td.time-cell span {
    color: var(--text-gray);
    font-size: 0.9em;
}

.timetable tr.break-row {
    background: rgba(var(--primary-rgb), 0.04);
    color: var(--text-muted);
    font-style: italic;
}

.timetable td.break-time-cell span {
    color: var(--primary-blue);
}

.timetable td.break-cell {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8em;
}

.timetable td.drag-over {
    background: rgba(var(--primary-rgb), 0.25) !important;
    border: 2px dashed var(--primary-blue) !important;
    transform: scale(1.02);
    z-index: 2;
}

.timetable td.disabled-day {
    background: repeating-linear-gradient(45deg, #111522, #111522 10px, #080c14 10px, #080c14 20px);
    color: rgba(255, 255, 255, 0.2);
    cursor: not-allowed;
    font-weight: 500;
}

.timetable td.x-mark {
    background: rgba(255, 59, 48, 0.12) !important;
}

.timetable td.x-mark::after {
    content: "✕ Off";
    font-size: 0.82rem;
    font-weight: 700;
    color: #ff6b6b;
}

.timetable td.subject-cell {
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.15);
    box-shadow: inset 0 0 12px rgba(0,0,0,0.2);
    transition: transform 0.15s;
}

.timetable td.subject-cell:hover {
    transform: scale(1.02);
    z-index: 3;
}

/* --- SUBJECT PICKER POPUP --- */
.subject-picker {
    position: fixed;
    background: #121824;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 9999;
    box-shadow: 0 15px 35px rgba(0,0,0,0.6);
    backdrop-filter: blur(16px);
    min-width: 200px;
    max-height: calc(100vh - 24px);
    overflow-y: auto;
    animation: pickerIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pickerIn {
    from { opacity: 0; transform: scale(0.95) translateY(-5px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.subject-picker button {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-soft);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
}

.subject-picker button:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-highlight);
}

.subject-picker .x-btn {
    background: rgba(255, 59, 48, 0.12);
    border-color: rgba(255, 59, 48, 0.3);
    color: #ff9999;
}

.subject-picker .x-btn:hover {
    background: #ff3b30;
    color: white;
}

/* SV MODAL POPUP: đã gom vào shared.css (dùng chung cả 4 trang) */

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .schedule-workspace {
        flex-direction: column;
    }
    .sidebar-panel {
        width: 100%;
    }
}

@media (max-width: 900px) {
    .main-schedule { padding-top: 120px; }
}

@media (max-width: 768px) {
    .main-schedule {
        padding-top: 100px; /* navbar mobile cao 64px */
        padding-bottom: 30px;
    }

    .container-fluid {
        padding: 0 12px;
    }

    .schedule-banner {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 18px;
        gap: 14px;
    }

    .banner-title h1 {
        font-size: 1.25rem;
    }

    .banner-title p {
        font-size: 0.78rem;
    }

    .banner-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .btn-action {
        padding: 8px 12px;
        font-size: 0.78rem;
        justify-content: center;
    }

    .sidebar-panel {
        width: 100%;
    }

    .panel-card {
        padding: 14px;
        border-radius: 14px;
    }

    .panel-card h3 {
        font-size: 0.9rem;
    }

    .form-group.row-group {
        flex-direction: column;
    }

    .preset-colors {
        gap: 6px;
    }

    .color-dot {
        width: 20px;
        height: 20px;
    }

    .timetable-toolbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 14px;
    }

    .toolbar-info {
        display: none;
    }

    .timetable-legend {
        gap: 10px;
    }

    .timetable-legend div {
        font-size: 0.75rem;
    }

    .timetable {
        font-size: 0.75rem;
        min-width: 700px;
    }

    .timetable th, .timetable td {
        padding: 10px 6px;
        height: 44px;
    }

    /* 16px để iOS Safari không tự zoom khi focus vào input tên môn học */
    input[type="text"], input[type="number"] {
        font-size: 16px;
    }

    .timetable th {
        font-size: 0.68rem;
    }

    .subjects-list {
        max-height: 240px;
    }
}

@media (max-width: 640px) {
    .schedule-banner {
        padding: 12px 14px;
    }

    .banner-title h1 {
        font-size: 1.1rem;
    }

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

    .btn-action {
        padding: 10px;
    }

    .timetable-container {
        border-radius: 12px;
    }

    .timetable {
        min-width: 600px;
        font-size: 0.7rem;
    }

    .main-schedule {
        padding-bottom: calc(20px + env(safe-area-inset-bottom));
    }
}

/* --- TIME CONFIG MODAL (Cấu hình thời gian) --- */
.time-config-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 5, 9, 0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 10000;
    animation: fadeIn 0.2s ease-out;
}

.time-config-modal {
    width: 100%;
    max-width: 720px;
    max-height: calc(100vh - 40px);
    max-height: calc(100dvh - 40px);
    display: flex;
    flex-direction: column;
    background: var(--panel-bg);
    border: 1px solid var(--border-highlight);
    border-radius: 24px;
    padding: 24px 24px 18px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.65), 0 0 40px rgba(var(--primary-rgb), 0.08);
}

.time-config-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.time-config-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-white);
    display: flex;
    align-items: center;
    gap: 10px;
}

.time-config-header h3 i { color: var(--primary-blue); }

.time-config-subtitle {
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 0.76rem;
    line-height: 1.45;
}

.time-config-close {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 50%;
    border: 1px solid var(--border-soft);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.2s ease;
}

.time-config-close:hover { color: #fff; border-color: var(--border-highlight); }

.time-config-hint {
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.time-config-summary {
    align-self: flex-start;
    margin-bottom: 12px;
    padding: 6px 10px;
    border: 1px solid rgba(var(--primary-rgb), 0.25);
    border-radius: 999px;
    background: rgba(var(--primary-rgb), 0.09);
    color: var(--text-gray);
    font-size: 0.74rem;
    font-weight: 600;
}

.time-config-settings {
    display: flex;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 16px;
    padding: 10px;
    border: 1px solid var(--border-soft);
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.035);
}

.tc-duration-setting,
.tc-lock-setting {
    min-height: 48px;
    display: flex;
    align-items: center;
}

.tc-duration-setting {
    flex: 0 0 250px;
    justify-content: space-between;
    gap: 10px;
    padding: 0 10px 0 4px;
    border-right: 1px solid var(--border-soft);
}

.tc-setting-copy,
.tc-setting-copy strong,
.tc-lock-copy strong {
    color: var(--text-white);
    font-size: 0.76rem;
    font-weight: 700;
}

.tc-setting-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tc-setting-copy small {
    max-width: 150px;
    color: var(--text-muted);
    font-size: 0.66rem;
    font-weight: 400;
    line-height: 1.3;
}

.tc-number-wrap {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-muted);
    font-size: 0.72rem;
}

.tc-lesson-duration {
    position: relative;
    z-index: 1;
    width: 88px;
    min-height: 34px;
    padding: 5px 7px;
    box-sizing: border-box;
    border: 1px solid var(--border-soft);
    border-radius: 9px;
    outline: none;
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
    font: inherit;
    font-weight: 700;
    text-align: center;
    pointer-events: auto;
    appearance: textfield;
    -moz-appearance: textfield;
}

.tc-lesson-duration::-webkit-outer-spin-button,
.tc-lesson-duration::-webkit-inner-spin-button {
    margin: 0;
    appearance: none;
    -webkit-appearance: none;
}

.tc-lesson-duration:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px var(--primary-blue-glow);
}

.tc-lock-setting {
    position: relative;
    flex: 1;
    gap: 9px;
    cursor: pointer;
}

.tc-lock-setting > input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.tc-switch {
    position: relative;
    width: 38px;
    height: 22px;
    flex: 0 0 38px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    transition: background 0.2s ease;
}

.tc-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
}

.tc-lock-setting > input:checked + .tc-switch { background: var(--primary-blue); }
.tc-lock-setting > input:checked + .tc-switch::after { transform: translateX(16px); }
.tc-lock-setting > input:focus-visible + .tc-switch { box-shadow: 0 0 0 3px var(--primary-blue-glow); }

.tc-lock-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tc-lock-copy small {
    color: var(--text-muted);
    font-size: 0.68rem;
    line-height: 1.3;
}

.time-config-columns {
    display: grid;
    grid-template-columns: 30px minmax(170px, 1fr) minmax(220px, auto) 84px;
    gap: 12px;
    padding: 0 12px 7px;
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.time-config-columns span:nth-child(3) { text-align: center; }
.time-config-columns span:last-child { text-align: right; }

/* Danh sách tiết: cuộn được khi màn hình thấp */
.time-config-list {
    overflow-y: auto;
    overscroll-behavior: contain;
    margin: 0 -6px 14px;
    padding: 0 6px 2px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.time-config-row {
    display: grid;
    grid-template-columns: 30px minmax(150px, 1fr) auto auto;
    grid-template-areas:
        "handle main times actions"
        "message message message message";
    align-items: center;
    gap: 8px 12px;
    padding: 11px 12px 10px;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid var(--border-soft);
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.time-config-row.is-break {
    background: rgba(255, 255, 255, 0.015);
    color: var(--text-gray);
}

.time-config-row:focus-within {
    border-color: rgba(var(--primary-rgb), 0.65);
    background: rgba(var(--primary-rgb), 0.055);
}

.tc-drag-handle {
    grid-area: handle;
    width: 28px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    cursor: grab;
    touch-action: none;
}

.tc-drag-handle:hover { color: var(--primary-blue); background: rgba(var(--primary-rgb), 0.1); }
.tc-drag-handle:active { cursor: grabbing; }
.tc-drag-handle:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-blue-glow);
}

.time-config-row.is-dragging { opacity: 0.42; }
.time-config-row.is-drop-before { box-shadow: 0 -3px 0 var(--primary-blue); }
.time-config-row.is-drop-after { box-shadow: 0 3px 0 var(--primary-blue); }

.time-config-row.is-invalid {
    border-color: #ff3b30;
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.18);
}

/* Cảnh báo trùng / chồng lấn giờ (màu hổ phách, khác lỗi nhập liệu ở trên) */
.time-config-row.is-overlap {
    border-color: #ffb340;
    box-shadow: 0 0 0 3px rgba(255, 149, 0, 0.18);
}

.tc-name {
    min-width: 0;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.time-config-row.is-break .tc-name { color: var(--text-gray); }

.tc-row-main {
    grid-area: main;
    min-width: 0;
}

.tc-row-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.tc-index {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(var(--primary-rgb), 0.14);
    color: var(--primary-blue);
    font-size: 0.72rem;
    font-weight: 800;
}

.time-config-row.is-break .tc-index {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-gray);
    font-size: 0.7rem;
}

.tc-type {
    flex-shrink: 0;
    padding: 3px 7px;
    border-radius: 999px;
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-blue);
    font-size: 0.63rem;
    font-weight: 700;
}

.time-config-row.is-break .tc-type {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text-muted);
}

.tc-duration {
    display: block;
    margin: 5px 0 0 32px;
    color: var(--text-muted);
    font-size: 0.7rem;
}

.tc-row-actions {
    grid-area: actions;
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

.tc-icon-btn {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.72rem;
    transition: all 0.15s ease;
}

.tc-icon-btn:hover:not(:disabled) { color: #fff; background: rgba(255, 255, 255, 0.08); }
.tc-icon-btn:disabled { opacity: 0.25; cursor: default; }
.tc-icon-btn.tc-dup:hover:not(:disabled) { color: var(--primary-blue); background: rgba(var(--primary-rgb), 0.12); }
.tc-icon-btn.tc-del:hover:not(:disabled) { color: #ff6b6b; background: rgba(255, 59, 48, 0.12); }

.tc-row-message {
    grid-area: message;
    min-height: 0;
    margin: 0 0 0 32px;
    color: #ffb340;
    font-size: 0.7rem;
    line-height: 1.35;
}

.time-config-row.is-invalid .tc-row-message { color: #ff8179; }

/* Nút thêm tiết */
.time-config-add-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 13px;
}

.tc-add {
    width: 100%;
    min-height: 42px;
    padding: 10px;
    border-radius: 12px;
    border: 1px dashed var(--border-highlight);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-gray);
    font-weight: 600;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.tc-add:hover {
    color: #fff;
    border-color: var(--primary-blue);
    background: rgba(var(--primary-rgb), 0.08);
}

.tc-add-break {
    border-style: solid;
    border-color: var(--border-soft);
    background: rgba(255, 255, 255, 0.035);
}

.tc-add-break:hover { border-color: var(--border-highlight); }

/* Gợi ý phím tắt */
.time-config-shortcuts {
    font-size: 0.72rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin: -6px 0 14px;
}

.tc-times {
    grid-area: times;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.tc-time-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tc-time-field > span {
    color: var(--text-muted);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.tc-input {
    width: 102px;
    min-height: 34px;
    padding: 6px 8px;
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-soft);
    color: #fff;
    font-size: 0.85rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.tc-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px var(--primary-blue-glow);
}

.tc-input:disabled {
    cursor: not-allowed;
    opacity: 0.65;
    border-color: rgba(var(--primary-rgb), 0.35);
    background: rgba(var(--primary-rgb), 0.08);
}

/* Icon đồng hồ trong input type=time: làm sáng cho hợp nền tối */
.tc-input::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
    cursor: pointer;
}

.tc-sep { color: var(--text-muted); font-size: 0.85rem; }

.time-config-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tc-btn {
    padding: 10px 16px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.tc-reset {
    margin-right: auto;
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--border-soft);
    color: var(--text-gray);
}

.tc-reset:hover { color: #fff; border-color: var(--border-highlight); }

.tc-cancel {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-soft);
    color: var(--text-gray);
}

.tc-cancel:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.tc-save {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

.tc-save:hover { filter: brightness(1.12); transform: translateY(-1px); }

.time-config-close:focus-visible,
.tc-input:focus-visible,
.tc-btn:focus-visible,
.tc-icon-btn:focus-visible,
.tc-drag-handle:focus-visible,
.tc-add:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-blue-glow);
}

@media (max-width: 640px) {
    .time-config-modal { padding: 18px 14px 14px; border-radius: 19px; }
    .time-config-settings { flex-direction: column; gap: 8px; }
    .tc-duration-setting { flex-basis: auto; padding: 0 4px 9px; border-right: 0; border-bottom: 1px solid var(--border-soft); }
    .tc-lock-setting { padding: 2px 4px 0; }
    .time-config-columns { display: none; }
    .time-config-row {
        grid-template-columns: 30px 1fr auto;
        grid-template-areas:
            "handle main actions"
            "handle times times"
            "message message message";
    }
    .tc-times { justify-content: space-between; }
    .tc-time-field { flex: 1; }
    .tc-input { width: 100%; }
    .tc-icon-btn { width: 27px; }
    .time-config-add-group { grid-template-columns: 1fr; }
    .time-config-actions { gap: 6px; }
    .tc-btn { flex: 1; }
    .tc-reset { flex-basis: 100%; margin-right: 0; }
}

/* --- PRINT --- */
@media print {
    body {
        background: white !important;
        color: black !important;
    }
    .navbar, .sidebar-panel, .banner-actions, .timetable-toolbar, .time-config-overlay {
        display: none !important;
    }
    .main-schedule {
        padding: 0 !important;
    }
    .schedule-banner {
        background: none !important;
        border: none !important;
        box-shadow: none !important;
        padding: 0 0 20px 0 !important;
    }
    .banner-title h1 {
        color: black !important;
        -webkit-text-fill-color: black !important;
    }
    .timetable-container {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
        background: white !important;
    }
    .timetable th {
        background: #f0f0f0 !important;
        color: black !important;
        border: 1px solid #ddd !important;
    }
    .timetable td {
        background: white !important;
        color: black !important;
        border: 1px solid #ddd !important;
    }
    .timetable td.subject-cell {
        border: 1px solid #000 !important;
    }
}