/* ── Theme Variables ───────────────────────────────────────── */
:root {
    --bg: #0f0f14;
    --bg-card: #1a1a24;
    --bg-card-deep: #13131a;
    --bg-hover: #252535;
    --border: #2a2a3a;
    --border-hover: #3a3a4a;
    --text: #e0e0e0;
    --text-secondary: #aaa;
    --text-muted: #888;
    --text-dim: #666;
    --text-faint: #555;
    --text-subtle: #ccc;
    --grid-line: #1f1f2e;
    --drag-color: #444;
    --shadow: rgba(0,0,0,0.5);
    --overlay-bg: rgba(0,0,0,0.5);
    --tip-underline: rgba(255,255,255,0.3);
    --cal-invert: invert(0.7);
    --gauge-empty: #1f1f2e;
    --sortable-glow: rgba(59, 130, 246, 0.3);
}

[data-theme="light"] {
    --bg: #f0f2f5;
    --bg-card: #ffffff;
    --bg-card-deep: #f0f0f5;
    --bg-hover: #e4e4ec;
    --border: #d0d0da;
    --border-hover: #b8b8c8;
    --text: #1a1a2e;
    --text-secondary: #555;
    --text-muted: #777;
    --text-dim: #999;
    --text-faint: #aaa;
    --text-subtle: #444;
    --grid-line: #e0e0ea;
    --drag-color: #bbb;
    --shadow: rgba(0,0,0,0.08);
    --overlay-bg: rgba(0,0,0,0.25);
    --tip-underline: rgba(0,0,0,0.25);
    --cal-invert: invert(0);
    --gauge-empty: #e0e0ea;
    --sortable-glow: rgba(59, 130, 246, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 20px;
    min-height: 100vh;
}

body, body *, body *::before, body *::after {
    transition: background 0.4s ease, background-color 0.4s ease,
                color 0.4s ease, border-color 0.4s ease,
                box-shadow 0.4s ease;
}

/* ── Header ────────────────────────────────────────────────── */
h1 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #6ee7b7, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ── Toolbar ──────────────────────────────────────────────── */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 20px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.toolbar-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.toolbar-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
    font-weight: 500;
}

.toolbar-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
    flex-shrink: 0;
}

.date-range-picker {
    display: flex;
    align-items: center;
    gap: 6px;
}

.date-range-picker input[type="date"] {
    background: var(--bg-card-deep);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.date-range-picker input[type="date"]:focus {
    outline: none;
    border-color: #3b82f6;
}

.date-range-picker input[type="date"]::-webkit-calendar-picker-indicator {
    filter: var(--cal-invert);
}

.date-separator {
    color: var(--text-faint);
    font-size: 0.9rem;
}

.btn-row {
    display: flex;
    gap: 6px;
}

.day-picker-wrap {
    position: relative;
}

.day-picker-wrap input[type="date"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    opacity: 0;
    pointer-events: none;
}

.btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

select.btn {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
}

select.btn option {
    background: var(--bg-card);
    color: var(--text);
}

.btn-primary {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #fff;
}

.btn-primary:hover {
    background: #2563eb;
}

.btn-active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #fff;
}

.btn-sync.syncing {
    opacity: 0.6;
    pointer-events: none;
}

/* ── Theme Toggle ─────────────────────────────────────────── */
.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
    line-height: 1;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.subtitle {
    text-align: center;
    color: var(--text-dim);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

/* ── Profile ───────────────────────────────────────────────── */
.profile {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.profile-item {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 12px 20px;
    border: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.profile-item span { color: var(--text); font-weight: 600; }

/* ── Score Cards ───────────────────────────────────────────── */
.score-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 24px;
}

.score-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 14px 10px;
    text-align: center;
    border: 1px solid var(--border);
    transition: transform 0.2s, background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.score-card:hover { transform: translateY(-2px); }
.score-card .label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.score-card .value { font-size: 1.8rem; font-weight: 700; }
.score-card .unit { font-size: 0.7rem; color: var(--text-dim); margin-top: 2px; }
.value-unit { font-size: 0.9rem; font-weight: 500; opacity: 0.6; margin-left: 2px; }

.color-green  { color: #6ee7b7; }
.color-blue   { color: #60a5fa; }
.color-purple { color: #a78bfa; }
.color-orange { color: #fbbf24; }
.color-red    { color: #f87171; }
.color-cyan   { color: #22d3ee; }

/* ── Chart Grid ────────────────────────────────────────────── */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.chart-box {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border);
    position: relative;
    transition: opacity 0.3s, transform 0.3s, background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
    display: flex;
    flex-direction: column;
}

.chart-box h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.chart-box canvas {
    max-height: 300px;
}

.chart-container {
    position: relative;
    height: 280px;
}

.full-width {
    grid-column: 1 / -1;
}

/* ── Drag Handle ───────────────────────────────────────────── */
.drag-handle {
    position: absolute;
    top: 12px;
    right: 12px;
    cursor: grab;
    color: var(--drag-color);
    font-size: 1.1rem;
    padding: 4px;
    line-height: 1;
    user-select: none;
    transition: color 0.4s ease;
}

.drag-handle:hover { color: var(--text-muted); }
.drag-handle:active { cursor: grabbing; }

.sortable-ghost {
    opacity: 0.3;
}

.sortable-chosen {
    box-shadow: 0 0 20px var(--sortable-glow);
}

/* ── Widget Size Popup ─────────────────────────────────────── */
.size-popup {
    position: absolute;
    top: 40px;
    right: 12px;
    background: var(--bg-hover);
    border: 1px solid var(--border-hover);
    border-radius: 10px;
    padding: 8px 0;
    z-index: 100;
    box-shadow: 0 4px 20px var(--shadow);
    min-width: 160px;
    display: none;
}

.size-popup.open {
    display: block;
}

.size-popup-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    color: var(--text-subtle);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.4s ease, color 0.4s ease;
}

.size-popup-item:hover {
    background: var(--bg-card);
}

.size-popup-item .check {
    width: 16px;
    color: #3b82f6;
    font-weight: 700;
}

/* ── Widget Panel ──────────────────────────────────────────── */
.widget-panel {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100vh;
    background: var(--bg-card);
    border-left: 1px solid var(--border);
    padding: 24px;
    z-index: 1000;
    transition: right 0.3s ease, background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
    overflow-y: auto;
}

.widget-panel.open {
    right: 0;
}

.widget-panel h3 {
    color: var(--text);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.widget-panel-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
}

.widget-panel-close:hover { color: var(--text); }

.widget-panel-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-small {
    padding: 5px 12px;
    font-size: 0.78rem;
    flex: 1;
}

.widget-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.widget-toggle label {
    color: var(--text-subtle);
    font-size: 0.9rem;
    cursor: pointer;
    flex: 1;
}

.wt-unavailable {
    font-size: 0.7rem;
    color: var(--text-dim);
    font-style: italic;
}

.widget-toggle input[type="checkbox"]:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.widget-toggle input[type="checkbox"] {
    accent-color: #3b82f6;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.widget-panel-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-bg);
    z-index: 999;
}

.widget-panel-overlay.open {
    display: block;
}

/* ── Sleep Legend ───────────────────────────────────────────── */
.sleep-legend {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.sleep-legend > span::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 3px;
    margin-right: 4px;
    vertical-align: middle;
}

.leg-deep::before  { background: #6366f1; }
.leg-light::before { background: #60a5fa; }
.leg-rem::before   { background: #a78bfa; }
.leg-awake::before { background: #f87171; }

/* ── Tooltips ──────────────────────────────────────────────── */
.tip {
    position: relative;
    cursor: help;
    border-bottom: 1px dotted var(--tip-underline);
}

.tip .tip-text {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-hover);
    color: var(--text-subtle);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 400;
    line-height: 1.5;
    width: max-content;
    max-width: 300px;
    box-shadow: 0 4px 24px var(--shadow);
    border: 1px solid var(--border-hover);
    transition: opacity 0.2s, visibility 0.2s;
    z-index: 1000;
    pointer-events: none;
    text-transform: none;
    letter-spacing: normal;
}

.tip:hover .tip-text {
    visibility: visible;
    opacity: 1;
}

.tip .tip-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border-hover);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 600px) {
    .grid { grid-template-columns: 1fr; }
    .score-cards { grid-template-columns: repeat(2, 1fr); }
    body { padding: 10px; }
    .widget-panel { width: 260px; }
    .toolbar { padding: 10px 12px; gap: 10px; }
    .toolbar-divider { display: none; }
    .toolbar-label { display: none; }
}

/* ── Loading spinner ───────────────────────────────────────── */
.loading {
    text-align: center;
    color: var(--text-faint);
    padding: 40px;
    font-size: 0.9rem;
}

/* ── Score Cards in Widget ─────────────────────────────────── */
.score-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 10px;
    height: 100%;
}

.widget-content {
    flex: 1;
}

.score-cards-grid .score-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.score-cards-grid .score-card .label {
    font-size: 0.85rem;
}

.score-cards-grid .score-card .value {
    font-size: 2.4rem;
}

/* ── Overview Widget ───────────────────────────────────────── */
.overview-summary {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.overview-stat {
    flex: 1;
    min-width: 140px;
    background: var(--bg-card-deep);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    border: 1px solid var(--border);
}

.overview-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.overview-stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: #6ee7b7;
}

.overview-table {
    overflow-x: auto;
}

.overview-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.overview-table th {
    text-align: left;
    color: var(--text-muted);
    font-weight: 500;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.overview-table td {
    padding: 8px 12px;
    color: var(--text-subtle);
    border-bottom: 1px solid var(--grid-line);
}

.overview-table tr:hover td {
    background: var(--bg-card-deep);
}

.chart-box.hidden {
    display: none;
}