@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700;800&display=swap');

:root {
    --page-transition-ms: 320ms;
}

@view-transition {
    navigation: auto;
}

body {
    font-family: 'Open Sans', sans-serif;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--page-transition-ms) ease, transform var(--page-transition-ms) ease;
}

body.page-ready {
    opacity: 1;
    transform: translateY(0);
}

body.page-leaving {
    opacity: 0;
    transform: translateY(10px);
}

@media (prefers-reduced-motion: reduce) {
    body {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

.app-shell {
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
    padding: 1.5rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-header {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding-left: 4.25rem;
    padding-top: 0.1rem;
}

.app-title {
    margin: 0;
    font-size: 1.875rem;
    font-weight: 800;
    line-height: 1.15;
}

.title-gradient {
    color: #67e8f9;
    background-image: linear-gradient(90deg, #34d399, #22d3ee);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .title-gradient {
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        -webkit-text-fill-color: transparent;
    }
}

.app-subtitle {
    margin-top: 0.25rem;
    color: #94a3b8;
    font-size: 0.875rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-only-control {
    display: none;
}

.mobile-warning {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: 0.65rem;
    background: rgba(120, 53, 15, 0.25);
    padding: 0.65rem 0.8rem;
}

.mobile-warning.hidden {
    display: none;
}

.mobile-warning-text {
    margin: 0;
    font-size: 0.8rem;
    color: #fde68a;
    line-height: 1.3;
}

.btn {
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    padding: 0.55rem 1rem;
    border: 1px solid transparent;
    transition: 160ms ease;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-export {
    background: rgba(22, 78, 99, 0.35);
    color: #67e8f9;
    border-color: #155e75;
}

.btn-export:hover {
    background: rgba(22, 78, 99, 0.5);
}

.btn-clear {
    background: rgba(127, 29, 29, 0.35);
    color: #fda4af;
    border-color: #881337;
}

.btn-clear:hover {
    background: rgba(127, 29, 29, 0.5);
}

.btn-sm {
    padding: 0.5rem 0.7rem;
    font-size: 0.75rem;
}

.btn-icon,
.label-icon {
    display: inline-block;
    vertical-align: -0.1em;
    margin-right: 0.35rem;
    font-size: 1em;
}

.btn-icon {
    font-size: 0.9em;
}

.label-icon {
    color: #94a3b8;
}

.btn-save {
    background: rgba(5, 150, 105, 0.9);
    color: #0f172a;
}

.btn-save:hover {
    background: #10b981;
}

.btn-load {
    background: rgba(67, 56, 202, 0.7);
    color: #c7d2fe;
}

.btn-load:hover {
    background: rgba(67, 56, 202, 0.9);
}

.btn-plot {
    width: 100%;
    margin-top: 0.75rem;
    background: #34d399;
    color: #0f172a;
    font-size: 0.95rem;
}

.btn-plot:hover {
    background: #6ee7b7;
}

.app-content {
    display: flex;
    gap: 1.5rem;
    height: calc(100vh - 120px);
}

.sidebar-panel {
    width: 20rem;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.75rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    box-shadow: 0 20px 35px -20px rgba(0, 0, 0, 0.65);
}

.section-title {
    margin: 0 0 1rem;
    font-size: 1.125rem;
    font-weight: 800;
    color: #fff;
    border-bottom: 1px solid #334155;
    padding-bottom: 0.5rem;
}

.snapshot-panel,
.saved-panel {
    border: 1px solid #334155;
    border-radius: 0.5rem;
    background: rgba(15, 23, 42, 0.55);
    padding: 0.75rem;
}

.snapshot-panel {
    margin-bottom: 1rem;
}

.snapshot-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.field-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: #94a3b8;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.field-label.with-margin {
    margin-bottom: 0.25rem;
}

.field-input {
    width: 100%;
    background: #0f172a;
    border: 1px solid #475569;
    border-radius: 0.35rem;
    padding: 0.48rem 0.55rem;
    font-size: 0.875rem;
    color: #fff;
}

.field-input:focus {
    outline: none;
    border-color: #10b981;
}

.class-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.secondary-days-panel {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.secondary-day-trigger {
    width: 100%;
}

.secondary-days-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.secondary-day-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.secondary-day-select {
    flex: 1;
}

.remove-secondary-day-btn {
    border: 1px solid #7f1d1d;
    background: rgba(127, 29, 29, 0.35);
    color: #fda4af;
    border-radius: 0.35rem;
    width: 2rem;
    height: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    line-height: 1;
}

.remove-secondary-day-btn:hover {
    background: rgba(127, 29, 29, 0.5);
}

.split-fields {
    display: flex;
    gap: 0.5rem;
}

.half-field {
    width: 50%;
}

.color-picker {
    display: flex;
    gap: 0.5rem;
}

.drop-zone {
    margin-top: 0.5rem;
    border: 1px dashed #475569;
    border-radius: 0.4rem;
    padding: 0.5rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.7rem;
    background: rgba(15, 23, 42, 0.45);
    transition: 180ms ease;
}

.drop-zone.drag-active {
    border-color: #34d399;
    color: #a7f3d0;
    background: rgba(6, 78, 59, 0.3);
}

.header-note {
    display: inline-flex;
    align-items: center;
    flex: 1 1 35rem;
    max-width: 35rem;
    padding: 0.55rem 0.85rem;
    border-radius: 0.65rem;
    font-size: 0.8rem;
    line-height: 1.25;
}

.warning-box {
    border: 1px solid rgba(245, 158, 11, 0.35);
    background: rgba(245, 158, 11, 0.12);
    color: #fbbf24;
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.25);
    animation: pulse-warning 2.5s ease-in-out infinite;
}

@keyframes pulse-warning {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.15);
    }
    50% {
        box-shadow: 0 0 0 14px rgba(245, 158, 11, 0);
    }
}

.stats-section {
    margin-top: 1.5rem;
    border-top: 1px solid #334155;
    padding-top: 1rem;
    flex: 1;
}

.stats-label {
    margin: 0 0 0.45rem;
    font-size: 0.7rem;
    font-weight: 800;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stats-value {
    font-size: 1.875rem;
    font-weight: 900;
    color: #fff;
    line-height: 1;
}

.stats-note {
    margin: 0.3rem 0 0;
    color: #64748b;
    font-size: 0.72rem;
}

.saved-panel {
    margin-top: 1rem;
}

.saved-actions-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.saved-actions-grid #delete-selected-btn {
    grid-column: 1 / -1;
}

.manager-load {
    background: rgba(14, 116, 144, 0.65);
    color: #cffafe;
}

.manager-load:hover {
    background: rgba(8, 145, 178, 0.8);
}

.manager-overwrite {
    background: rgba(180, 83, 9, 0.65);
    color: #fef3c7;
}

.manager-overwrite:hover {
    background: rgba(217, 119, 6, 0.8);
}

.manager-delete {
    background: rgba(136, 19, 55, 0.7);
    color: #ffe4e6;
}

.manager-delete:hover {
    background: rgba(159, 18, 57, 0.85);
}

.saved-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    max-height: 10rem;
    overflow-y: auto;
}

.status-text {
    margin-top: 0.45rem;
    min-height: 1rem;
    font-size: 0.7rem;
    color: #94a3b8;
}

.status-text.tone-error {
    color: #fda4af;
}

.status-text.tone-success {
    color: #6ee7b7;
}

.timetable-panel {
    flex: 1;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.75rem;
    overflow-y: auto;
    box-shadow: 0 20px 35px -20px rgba(0, 0, 0, 0.65);
    position: relative;
}

.timetable-canvas {
    min-width: 700px;
    height: var(--timetable-height, 940px);
    position: relative;
}

.days-header {
    position: absolute;
    top: 0;
    left: 5rem;
    right: 0;
    height: 2.5rem;
    display: flex;
    border-bottom: 1px solid #334155;
    background: rgba(30, 41, 59, 0.92);
    backdrop-filter: blur(2px);
    z-index: 20;
}

.day-cell {
    flex: 1;
    text-align: center;
    padding: 0.5rem 0;
    font-size: 0.85rem;
    font-weight: 700;
    color: #cbd5e1;
}

.day-cell-border {
    border-right: 1px solid rgba(51, 65, 85, 0.7);
}

.time-axis-wrap {
    position: absolute;
    top: 2.5rem;
    left: 0;
    width: 5rem;
    bottom: 0;
    border-right: 1px solid #334155;
    background: rgba(30, 41, 59, 0.5);
    z-index: 10;
}

.grid-layer {
    position: absolute;
    top: 2.5rem;
    left: 5rem;
    right: 0;
    bottom: 0;
    opacity: 0.3;
    z-index: 0;
}

.day-dividers {
    position: absolute;
    top: 2.5rem;
    left: 5rem;
    right: 0;
    bottom: 0;
    display: flex;
    z-index: 0;
}

.day-divider {
    flex: 1;
    border-right: 1px solid rgba(51, 65, 85, 0.45);
}

.day-divider:last-child {
    border-right: none;
}

.blocks-layer {
    position: absolute;
    top: 2.5rem;
    left: 5rem;
    right: 0;
    bottom: 0;
    z-index: 10;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: #1e293b;
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

.grid-bg {
    background-image: linear-gradient(to bottom, #334155 1px, transparent 1px);
    background-size: 100% var(--hour-row-height, 60px);
}

.manager-btn {
    border: 1px solid rgba(71, 85, 105, 0.7);
    padding: 0.45rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.7rem;
    font-weight: 700;
    transition: 160ms ease;
}

.manager-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.saved-schedule-item {
    width: 100%;
    text-align: left;
    border: 1px solid #334155;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 0.375rem;
    padding: 0.4rem 0.5rem;
    transition: 160ms ease;
}

.saved-schedule-item:hover {
    border-color: #475569;
    background: rgba(30, 41, 59, 0.8);
}

.saved-schedule-item.active {
    border-color: #34d399;
    box-shadow: inset 0 0 0 1px rgba(52, 211, 153, 0.35);
}

.saved-list-empty {
    font-size: 0.75rem;
    color: #64748b;
    font-style: italic;
}

.saved-item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.saved-item-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: #f1f5f9;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.saved-item-meta {
    font-size: 0.62rem;
    color: #94a3b8;
    flex-shrink: 0;
}

.saved-item-updated {
    margin-top: 0.25rem;
    font-size: 0.62rem;
    color: #64748b;
}

.schedule-block {
    overflow: hidden;
}

.schedule-block-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.3rem;
}

.schedule-block-code {
    font-weight: 700;
    font-size: 0.75rem;
    line-height: 1.15;
    color: #fff;
}

.schedule-block-code.truncate,
.schedule-block-title.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.schedule-block-title {
    margin-top: 0.2rem;
    font-size: 0.64rem;
    line-height: 1.2;
    color: rgba(255, 255, 255, 0.88);
}

.schedule-block-title.wrap {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.schedule-block-meta {
    font-size: 0.64rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.92);
    margin-top: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.schedule-block-meta svg {
    width: 0.72rem;
    height: 0.72rem;
    flex: 0 0 auto;
    display: block;
    margin-top: 0;
}

.schedule-block-tags {
    margin-top: 0.3rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.schedule-tag {
    font-size: 0.6rem;
    font-weight: 700;
    background: rgba(15, 23, 42, 0.35);
    color: #f8fafc;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0.25rem;
    padding: 0.1rem 0.3rem;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

[data-export="true"] .schedule-block-code,
[data-export="true"] .schedule-block-title,
[data-export="true"] .schedule-block-meta {
    white-space: normal !important;
    overflow: visible !important;
    text-overflow: clip !important;
}

[data-export="true"] .schedule-block-title {
    display: block !important;
    -webkit-line-clamp: unset !important;
    line-clamp: unset !important;
    -webkit-box-orient: unset !important;
}

[data-export="true"] .schedule-block-tags {
    overflow: visible !important;
}

[data-export="true"] .schedule-tag {
    max-width: none !important;
    overflow: visible !important;
    text-overflow: clip !important;
}

.block-actions {
    display: flex;
    gap: 0.15rem;
    opacity: 0;
    transition: 140ms ease;
}

.schedule-block:hover .block-actions {
    opacity: 1;
}

.block-action-btn {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(15, 23, 42, 0.35);
    color: rgba(255, 255, 255, 0.75);
    border-radius: 0.25rem;
    width: 1.2rem;
    height: 1.2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
}

.block-action-btn:hover {
    color: #fff;
    background: rgba(15, 23, 42, 0.55);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.7);
    backdrop-filter: blur(3px);
    z-index: 80;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

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

.mobile-preview-modal {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.78);
    z-index: 95;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
}

.mobile-preview-modal.hidden {
    display: none;
}

.mobile-preview-card {
    width: min(100%, 56rem);
    height: min(92vh, 56rem);
    background: #111827;
    border: 1px solid rgba(71, 85, 105, 0.8);
    border-radius: 0.8rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mobile-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 0.8rem;
    border-bottom: 1px solid rgba(71, 85, 105, 0.75);
    background: rgba(30, 41, 59, 0.8);
}

.mobile-preview-header h3 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 800;
    color: #f8fafc;
}

.mobile-preview-container {
    flex: 1;
    overflow: auto;
    padding: 0.65rem;
    background: #0f172a;
}

.mobile-preview-container .timetable-panel {
    min-height: 100%;
}

.modal-card {
    width: min(32rem, 95vw);
    background: #1e293b;
    border: 1px solid #475569;
    border-radius: 0.75rem;
    padding: 1rem;
    box-shadow: 0 25px 40px -25px rgba(0, 0, 0, 0.8);
}

.modal-title {
    margin-bottom: 0.9rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.home-fab {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 90;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background: rgba(15, 23, 42, 0.82);
    color: #e2e8f0;
    font-size: 0.72rem;
    font-weight: 800;
    text-decoration: none;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
    transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.home-fab:hover {
    transform: translateY(-1px);
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(52, 211, 153, 0.45);
}

@media (max-width: 768px) {
    .mobile-only-control {
        display: inline-flex;
    }

    .app-header {
        padding-left: 0;
    }

    .app-shell {
        overflow: auto;
        padding: 1rem 0.8rem;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .app-content {
        height: auto;
        min-height: 0;
        flex-direction: column;
    }

    .sidebar-panel,
    .timetable-panel {
        width: 100%;
    }

    .app-content.mobile-plotter-mode .timetable-panel {
        display: none;
    }

    .app-content.mobile-timetable-mode .sidebar-panel {
        display: none;
    }

    .app-content.mobile-timetable-mode .timetable-panel {
        min-height: 76vh;
    }

    .mobile-warning {
        flex-direction: column;
        align-items: stretch;
    }
}