:root {
    color-scheme: light;
    --surface: #ffffff;
    --surface-alt: #f5f7fa;
    --line: #c7ced8;
    --line-strong: #8a94a6;
    --text: #172033;
    --muted: #657086;
    --accent: #245ea8;
    --accent-strong: #164783;
    --success: #2f7d57;
    --danger: #b33b35;
    --warning: #a46120;
    --shadow: 0 12px 28px rgba(24, 34, 52, 0.12);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background: #eef1f5;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

button:disabled {
    cursor: default;
    opacity: 0.45;
}

.empty-state {
    min-height: 100vh;
    display: grid;
    place-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
}

.empty-state h1 {
    margin: 0;
    font-size: 1.6rem;
}

.schedule-app {
    display: grid;
    grid-template-rows: auto 1fr;
    height: 100vh;
    min-height: 720px;
    overflow: hidden;
}

.schedule-toolbar {
    display: grid;
    grid-template-columns: minmax(250px, 330px) 1fr;
    gap: 0.55rem 0.75rem;
    align-items: center;
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--line);
    background: #fbfcfe;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset;
}

.brand-block {
    display: grid;
    gap: 0.1rem;
}

.brand-block h1 {
    margin: 0;
    font-size: 1rem;
    line-height: 1.15;
}

.brand-block span,
.toolbar-section label span,
.resize-control span,
.panel-heading span,
.muted,
.program-block small,
.selected-list span {
    color: var(--muted);
}

.toolbar-section {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    min-width: 0;
}

.channel-strip {
    overflow: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.05rem;
}

.filters,
.day-strip,
.controls {
    grid-column: 1 / -1;
}

.filters label,
.details-form label,
.search-box {
    display: grid;
    gap: 0.18rem;
}

.filters label {
    grid-template-columns: auto minmax(84px, 1fr);
    align-items: center;
}

.filters input,
.details-form input,
.details-form textarea,
.search-box input {
    min-width: 0;
    height: 2rem;
    padding: 0.3rem 0.45rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
    color: var(--text);
}

.details-form textarea {
    height: 5.5rem;
    resize: vertical;
}

.button,
.channel-toggle,
.day-toggle,
.segmented button {
    min-height: 2rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
    color: var(--text);
}

.button {
    padding: 0.34rem 0.6rem;
    white-space: nowrap;
}

.button.primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.button.danger {
    border-color: #d1aaa7;
    color: var(--danger);
}

.channel-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.5rem;
    white-space: nowrap;
}

.channel-toggle.selected,
.day-toggle.selected,
.segmented button.selected {
    border-color: var(--accent);
    background: #eaf2ff;
    color: var(--accent-strong);
}

.channel-swatch {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.16);
    flex: 0 0 auto;
}

.day-toggle {
    width: 2rem;
    padding: 0;
}

.segmented {
    display: inline-grid;
    grid-template-columns: 1fr 1fr;
    border-radius: 4px;
    overflow: hidden;
}

.segmented button {
    border-radius: 0;
    border-right-width: 0;
    padding: 0.32rem 0.55rem;
}

.segmented button:last-child {
    border-right-width: 1px;
}

.check {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 2rem;
}

.resize-control {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    height: 2rem;
    padding: 0 0.4rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
}

.resize-control strong {
    min-width: 3.8rem;
    text-align: right;
}

.drag-handle {
    width: 1rem;
    height: 1.35rem;
    border-left: 3px double var(--line-strong);
    border-right: 3px double var(--line-strong);
    cursor: ew-resize;
}

.drag-handle.vertical {
    width: 1.35rem;
    height: 1rem;
    border-left: 0;
    border-right: 0;
    border-top: 3px double var(--line-strong);
    border-bottom: 3px double var(--line-strong);
    cursor: ns-resize;
}

.editor-shell {
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 365px);
    gap: 0.75rem;
    padding: 0.75rem;
}

.schedule-panel,
.details-panel {
    min-width: 0;
    min-height: 0;
}

.schedule-panel {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 0.5rem;
}

.schedule-commandbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    gap: 0.75rem;
}

.toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.search-box,
.target-box {
    grid-template-columns: auto minmax(150px, 240px);
    align-items: center;
}

.target-box {
    display: grid;
    grid-template-columns: auto minmax(150px, 220px) 5.4rem;
    gap: 0.35rem;
    align-items: center;
    min-width: 0;
}

.target-box strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
}

.target-box input {
    min-width: 0;
    height: 2rem;
    padding: 0.3rem 0.45rem;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
    color: var(--text);
}

.schedule-grid-shell {
    position: relative;
    display: grid;
    grid-template-columns: 76px minmax(0, 1fr);
    grid-template-rows: 52px minmax(0, 1fr);
    min-height: 0;
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.corner-cell {
    grid-column: 1;
    grid-row: 1;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: #e4e8ee;
    z-index: 4;
}

.column-header-layer {
    grid-column: 2;
    grid-row: 1;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background: #f8fafc;
    z-index: 3;
}

.time-header-layer {
    grid-column: 1;
    grid-row: 2;
    position: relative;
    overflow: hidden;
    border-right: 1px solid var(--line);
    background: #f8fafc;
    z-index: 3;
}

.column-header {
    position: absolute;
    top: 0;
    height: 52px !important;
    display: grid;
    align-content: center;
    gap: 0.05rem;
    padding: 0.25rem 0.45rem;
    border-left: 1px solid;
    border-right: 1px solid;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.column-header strong,
.column-header span {
    overflow: hidden;
    text-overflow: ellipsis;
}

.column-header span {
    font-size: 0.77rem;
    color: var(--muted);
}

.column-header.row-header {
    width: 76px !important;
    border-left: 0;
    border-right: 0;
    border-top: 1px solid;
    border-bottom: 1px solid;
    white-space: normal;
}

.time-label {
    position: absolute;
    left: 0.25rem;
    width: 4.2rem;
    height: 1.1rem;
    text-align: right;
    font-size: 0.76rem;
    color: var(--muted);
}

.time-label.top {
    top: 0.35rem;
    width: 4.8rem;
    text-align: center;
}

.schedule-scroll {
    grid-column: 2;
    grid-row: 2;
    overflow: auto;
    position: relative;
    background:
        linear-gradient(#f1f4f8 1px, transparent 1px),
        linear-gradient(90deg, #eef2f7 1px, transparent 1px),
        #fff;
    background-size: 100% 36px, 120px 100%;
}

.schedule-canvas {
    position: relative;
    min-width: 100%;
    min-height: 100%;
}

.schedule-loading {
    padding: 1rem;
    color: var(--muted);
}

.schedule-column {
    position: absolute;
    padding: 0;
    border: 0 solid;
    border-left-width: 1px;
    border-right-width: 1px;
    opacity: 0.55;
}

.schedule-column.active {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    opacity: 0.82;
}

.time-rule {
    position: absolute;
    background: rgba(101, 112, 134, 0.22);
    pointer-events: none;
}

.time-rule.major {
    background: rgba(36, 94, 168, 0.34);
}

.program-block {
    position: absolute;
    display: grid;
    align-content: start;
    gap: 0.15rem;
    padding: 0.35rem 0.45rem;
    border: 1px solid;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(24, 34, 52, 0.12);
    overflow: hidden;
    text-align: left;
}

.program-block.selected {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.program-block span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 650;
}

.program-block small {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.75rem;
}

.details-panel {
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr);
    align-content: start;
    gap: 0.75rem;
    overflow: auto;
}

.details-panel section {
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: 0 4px 14px rgba(24, 34, 52, 0.08);
}

.panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    min-height: 2.5rem;
    padding: 0.55rem 0.65rem;
    border-bottom: 1px solid var(--line);
    background: var(--surface-alt);
}

.panel-heading h2 {
    margin: 0;
    font-size: 0.96rem;
}

.details-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
    padding: 0.65rem;
}

.details-form .full,
.details-form button {
    grid-column: 1 / -1;
}

.muted {
    margin: 0;
    padding: 0.75rem;
}

.selected-list {
    display: grid;
    max-height: 240px;
    overflow: auto;
}

.selected-list button {
    display: grid;
    gap: 0.1rem;
    width: 100%;
    padding: 0.55rem 0.65rem;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: #fff;
    text-align: left;
}

.selected-list button:hover {
    background: #f3f6fa;
}

.status-message {
    margin: 0;
    padding: 0.65rem;
    border-left: 4px solid var(--success);
    background: #eef8f2;
}

.blazor-error-boundary {
    background: #b32121;
    color: #fff;
    padding: 1rem;
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}

@media (max-width: 960px) {
    .schedule-app {
        height: auto;
        min-height: 100vh;
        overflow: visible;
    }

    .schedule-toolbar {
        grid-template-columns: 1fr;
    }

    .editor-shell {
        grid-template-columns: 1fr;
        height: calc(100vh - 240px);
    }

    .schedule-commandbar {
        grid-template-columns: 1fr;
    }

    .details-panel {
        display: none;
    }
}