/* ---------- Screen / scaffold ---------- */

#app {
    min-height: 100vh;
    background: var(--md-background);
    color: var(--md-on-background);
    display: flex;
    flex-direction: column;
}

.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.screen-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.with-bottom-pad {
    padding-bottom: env(safe-area-inset-bottom);
}

/* Slide transitions */
.screen-enter {
    transform: translateX(8%);
    opacity: 0;
    transition: transform 280ms cubic-bezier(.2,.7,.2,1), opacity 280ms ease;
}
.screen-enter:not(.screen-exit) {
    transform: translateX(0);
    opacity: 1;
}
.screen-exit {
    transform: translateX(-8%);
    opacity: 0;
    transition: transform 280ms cubic-bezier(.2,.7,.2,1), opacity 280ms ease;
}

/* ---------- TopAppBar ---------- */

.topbar {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: var(--md-surface);
    color: var(--md-on-surface);
    min-height: 56px;
    gap: 4px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-back {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    color: var(--md-on-surface);
    font-size: 22px;
    line-height: 1;
}
.topbar-back:hover { background: color-mix(in srgb, var(--md-on-surface) 8%, transparent); }

.topbar-title {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.topbar-title-main {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.topbar-title-sub {
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 2px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface);
}
.icon-btn:hover { background: color-mix(in srgb, var(--md-on-surface) 8%, transparent); }

/* ---------- Cards ---------- */

.card {
    background: var(--md-surface-variant);
    color: var(--md-on-surface);
    border-radius: 12px;
    padding: 12px;
    margin: 8px 16px;
}
.card.clickable { cursor: pointer; transition: background 120ms; }
.card.clickable:hover { background: color-mix(in srgb, var(--md-on-surface) 6%, var(--md-surface-variant)); }

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 14px;
    transition: background 120ms;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}
.btn-primary:hover:not(:disabled) {
    background: color-mix(in srgb, var(--md-primary) 90%, black);
}

.btn-text {
    background: transparent;
    color: var(--md-primary);
}
.btn-text:hover:not(:disabled) {
    background: color-mix(in srgb, var(--md-primary) 12%, transparent);
}

/* ---------- Inputs ---------- */

.text-field {
    width: calc(100% - 32px);
    margin: 12px 16px;
    padding: 12px 14px;
    background: var(--md-surface-variant);
    color: var(--md-on-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 12px;
    outline: none;
    font-size: 14px;
}
.text-field::placeholder { color: var(--md-on-surface-variant); }
.text-field:focus { border-color: var(--md-primary); }

/* ---------- Spinner ---------- */

.spinner {
    width: 28px;
    height: 28px;
    border: 3px solid color-mix(in srgb, var(--md-primary) 30%, transparent);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ---------- Empty state ---------- */

.empty-state {
    padding: 48px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    color: var(--md-on-surface-variant);
}
.empty-state-title {
    color: var(--md-on-surface);
    font-size: 16px;
    font-weight: 600;
}
.empty-state-subtitle {
    font-size: 14px;
    line-height: 1.5;
}

/* ---------- Bottom sheet (for lesson context menu) ---------- */

.bottom-sheet-scrim {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 50;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    animation: scrim-fade 220ms ease;
}
.bottom-sheet {
    background: var(--md-surface);
    color: var(--md-on-surface);
    border-radius: 24px 24px 0 0;
    padding: 16px 20px 32px;
    width: 100%;
    max-width: 600px;
    animation: sheet-slide 280ms cubic-bezier(.2,.7,.2,1);
}
.bottom-sheet-handle {
    width: 32px;
    height: 4px;
    background: var(--md-outline-variant);
    border-radius: 2px;
    margin: 0 auto 12px;
}

@keyframes scrim-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes sheet-slide {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* ---------- Picker rows (Appearance, wizards) ---------- */

.picker-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.picker-row.selected {
    border: 1.5px solid var(--md-primary);
}
.picker-label {
    font-size: 14px;
}
.picker-check {
    color: var(--md-primary);
    font-size: 18px;
    font-weight: 700;
}

/* ---------- Color editor rows ---------- */

.color-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.color-swatch {
    width: 32px;
    height: 32px;
    border-radius: 16px;
    border: 1.5px solid var(--md-outline-variant);
    flex-shrink: 0;
}
.color-row-label { flex: 1; font-size: 13px; font-family: 'JetBrains Mono', monospace; }
.color-row-value { font-size: 12px; color: var(--md-on-surface-variant); font-family: monospace; }

.color-picker .color-preview {
    width: 100%;
    height: 56px;
    border-radius: 12px;
    border: 1.5px solid var(--md-outline-variant);
    margin: 8px 0 16px;
}
.color-picker .hex-input {
    width: 100%;
    margin: 0 0 16px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: monospace;
}
.slider-row {
    display: grid;
    grid-template-columns: 20px 1fr 40px;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
}
.slider-row input[type=range] {
    width: 100%;
}
.slider-value {
    text-align: right;
    color: var(--md-on-surface-variant);
    font-family: monospace;
    font-size: 12px;
}
.color-picker-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 16px;
}

/* ---------- Calendar / Curriculum ---------- */

.section-subtitle {
    font-size: 13px;
    font-weight: 700;
    color: var(--md-primary);
    margin-bottom: 8px;
}
.section-subtitle.primary { color: var(--md-primary); }
.section-subtitle.error   { color: var(--md-error); }

.meta-rows {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.meta-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
}
.meta-label { color: var(--md-on-surface-variant); }
.meta-value { color: var(--md-on-surface); text-align: end; }

.holidays-card .holiday-row {
    padding: 4px 0;
    font-size: 13px;
    color: var(--md-on-surface);
}

.activity-row {
    display: flex;
    gap: 10px;
    padding: 6px 0;
    align-items: stretch;
}
.activity-bar {
    width: 3px;
    border-radius: 1.5px;
    flex-shrink: 0;
}
.activity-bar.activity-primary   { background: var(--md-primary); }
.activity-bar.activity-error     { background: var(--md-error); }
.activity-bar.activity-secondary { background: var(--md-secondary); }
.activity-bar.activity-tertiary  { background: var(--md-tertiary); }
.activity-bar.activity-muted     { background: var(--md-outline); }
.activity-text { flex: 1; }
.activity-title { font-size: 14px; color: var(--md-on-surface); }
.activity-date { font-size: 12px; color: var(--md-on-surface-variant); }

/* ---------- Wizards ---------- */

.wizard-actions {
    display: flex;
    justify-content: flex-end;
    padding: 16px;
}

.error-banner {
    margin: 12px 16px;
    padding: 12px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--md-error) 15%, transparent);
    color: var(--md-error);
    font-size: 13px;
    line-height: 1.4;
}

/* ---------- Teacher search ---------- */

.fav-star {
    color: var(--md-tertiary);
    font-size: 18px;
    margin-right: 8px;
}
.icon-btn.starred {
    color: var(--md-tertiary);
}
.topbar-toggle {
    padding: 4px 12px !important;
}

/* ---------- Curriculum disciplines ---------- */

.discipline-card { gap: 6px; display: flex; flex-direction: column; }
.discipline-name { font-size: 14px; font-weight: 600; }
.discipline-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.discipline-meta { font-size: 12px; color: var(--md-on-surface-variant); }

/* ---------- Compare ---------- */

.compare-header {
    padding: 12px 16px;
    color: var(--md-primary);
    font-weight: 600;
    text-align: center;
}
.compare-day { padding: 0 16px 16px; }
.compare-row {
    display: grid;
    grid-template-columns: 80px 1fr 1fr;
    align-items: start;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid var(--md-outline-variant);
    font-size: 13px;
}
.compare-row:last-child { border-bottom: none; }
.compare-time { font-weight: 600; color: var(--md-primary); }
.compare-subject { font-size: 13px; line-height: 1.3; }
.compare-empty { color: var(--md-on-surface-variant); text-align: center; }

/* ---------- Room search ---------- */

.room-card { display: flex; flex-direction: column; gap: 6px; }
.room-card-title { font-size: 16px; font-weight: 700; color: var(--md-primary); }
.room-slot {
    display: grid;
    grid-template-columns: 40px 100px 1fr;
    gap: 8px;
    font-size: 13px;
}
.room-day { color: var(--md-on-surface-variant); font-weight: 600; }
.room-time { color: var(--md-primary); font-weight: 600; }
.room-subject {
    color: var(--md-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---------- Zaoch ---------- */

.zaoch-tabs {
    display: flex;
    gap: 4px;
    overflow-x: auto;
    padding: 8px 16px;
    background: var(--md-surface);
    position: sticky;
    top: 0;  /* sticks to top of .screen-body, same reason as .date-tabs-row */
    z-index: 5;
}
.zaoch-tab {
    padding: 8px 14px;
    border-radius: 18px;
    background: var(--md-surface-variant);
    color: var(--md-on-surface-variant);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
}
.zaoch-tab.active {
    background: var(--md-primary);
    color: var(--md-on-primary);
}
.zaoch-pane {
    padding: 48px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}
.zaoch-message { color: var(--md-on-surface-variant); font-size: 14px; }

/* ---------- Privacy ---------- */

.privacy-link { display: flex; flex-direction: column; gap: 2px; }
.privacy-summary {
    padding: 0 16px 24px;
    color: var(--md-on-surface);
    font-size: 14px;
    line-height: 1.5;
}
.privacy-summary p { margin-bottom: 12px; }

/* ---------- Lesson card: pin badge, note dot ---------- */

.lesson-subject-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
}
.lesson-meta-right {
    display: flex;
    align-items: center;
    gap: 6px;
}
.note-dot {
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: var(--md-tertiary);
    flex-shrink: 0;
}
.lesson-pin-badge {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    background: color-mix(in srgb, var(--md-primary) 15%, transparent);
    color: var(--md-primary);
}

/* ---------- Lesson bottom-sheet ---------- */

.lesson-sheet {
    padding: 16px 20px 32px;
}
.lesson-sheet-subject {
    font-size: 16px;
    font-weight: 700;
    color: var(--md-on-surface);
    margin-bottom: 4px;
}
.lesson-sheet-meta {
    font-size: 13px;
    color: var(--md-on-surface-variant);
    margin-bottom: 12px;
}
.lesson-sheet-action {
    width: 100%;
    text-align: left;
    padding: 14px 4px;
    font-size: 15px;
    color: var(--md-primary);
    border-radius: 8px;
    background: transparent;
}
.lesson-sheet-action:hover {
    background: color-mix(in srgb, var(--md-primary) 8%, transparent);
}
.lesson-sheet-action.action-danger {
    color: var(--md-error);
}
.lesson-sheet-action.action-danger:hover {
    background: color-mix(in srgb, var(--md-error) 8%, transparent);
}
.lesson-sheet-divider {
    height: 1px;
    background: var(--md-outline-variant);
    margin: 8px 0;
}

/* ---------- Note dialog ---------- */

.note-dialog {
    background: var(--md-surface);
    color: var(--md-on-surface);
    border-radius: 24px;
    padding: 20px 20px 16px;
    width: calc(100% - 32px);
    max-width: 420px;
    margin: auto;
    animation: dialog-enter 200ms ease;
}
.note-dialog-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
}
.note-textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--md-surface-variant);
    color: var(--md-on-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 12px;
    font: inherit;
    font-size: 14px;
    resize: vertical;
    min-height: 96px;
    outline: none;
}
.note-textarea:focus { border-color: var(--md-primary); }
.note-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 4px;
    margin-top: 12px;
}
.note-dialog-actions .action-danger { color: var(--md-error); }

/* Center the note dialog (override scrim's default flex-end). */
.bottom-sheet-scrim:has(.note-dialog) {
    align-items: center;
}

@keyframes dialog-enter {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}

/* ---------- Pull-to-refresh ---------- */

.pull-refresh-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    transform: translateY(-40px);
    opacity: 0;
    z-index: 100;
}
.pull-refresh-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid color-mix(in srgb, var(--md-primary) 30%, transparent);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    transition: transform 100ms linear;
}
.pull-refresh-indicator.ready .pull-refresh-spinner {
    transform: rotate(180deg);
}
.pull-refresh-indicator.refreshing .pull-refresh-spinner {
    animation: spin 1s linear infinite;
}