/* CSS Variables for theming */
:root {
    --bg-primary: #f0f2f5;
    --bg-card: #fff;
    --bg-settings: #f8f9fa;
    --bg-input: #fff;
    --text-primary: #333;
    --text-heading: #1a1a2e;
    --text-heading-2: #16213e;
    --text-muted: #666;
    --text-muted-2: #777;
    --text-muted-3: #888;
    --text-muted-4: #999;
    --text-table-head: #555;
    --border-color: #e0e0e0;
    --border-light: #ddd;
    --border-settings: #e9ecef;
    --btn-secondary-bg: #e9ecef;
    --btn-secondary-hover: #dee2e6;
    --btn-danger-bg: #fff0f0;
    --btn-danger-border: #fcd;
    --btn-danger-hover: #fde8e8;
    --btn-delete-hover-bg: #fde8e8;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 4px 20px rgba(0, 0, 0, 0.1);
    --paste-zone-bg: #fafbfc;
    --paste-zone-hover-bg: #f0f4ff;
    --code-bg: #f0f2f5;
    --modal-overlay: rgba(0, 0, 0, 0.4);
    --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    --chart-wrapper-bg: #fff;
    --drag-hover-bg: #e8f0fe;
    --divider-bg: #ddd;
    --slider-track: #ddd;
    --range-thumb: #4361ee;
    --accent: #4361ee;
    --accent-hover: #3a56d4;
    --accent-light: rgba(67, 97, 238, 0.08);
    --row-alt-bg: rgba(0, 0, 0, 0.015);
    --row-hover-bg: rgba(67, 97, 238, 0.04);
    --footer-color: #bbb;
}

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-card: #16213e;
    --bg-settings: #1c2a4a;
    --bg-input: #0f1729;
    --text-primary: #e0e0e0;
    --text-heading: #e8e8e8;
    --text-heading-2: #d0d0d0;
    --text-muted: #aaa;
    --text-muted-2: #999;
    --text-muted-3: #888;
    --text-muted-4: #777;
    --text-table-head: #bbb;
    --border-color: #2a3a5c;
    --border-light: #2a3a5c;
    --border-settings: #253555;
    --btn-secondary-bg: #253555;
    --btn-secondary-hover: #2e4470;
    --btn-danger-bg: #2a1520;
    --btn-danger-border: #5a2030;
    --btn-danger-hover: #3a1a28;
    --btn-delete-hover-bg: #3a1a28;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.25);
    --shadow-card-hover: 0 4px 20px rgba(0, 0, 0, 0.35);
    --paste-zone-bg: #0f1729;
    --paste-zone-hover-bg: #1a2540;
    --code-bg: #0f1729;
    --modal-overlay: rgba(0, 0, 0, 0.6);
    --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --chart-wrapper-bg: #16213e;
    --drag-hover-bg: #1a2540;
    --divider-bg: #2a3a5c;
    --slider-track: #2a3a5c;
    --range-thumb: #5a7bff;
    --accent: #5a7bff;
    --accent-hover: #4a6aee;
    --accent-light: rgba(90, 123, 255, 0.1);
    --row-alt-bg: rgba(255, 255, 255, 0.02);
    --row-hover-bg: rgba(90, 123, 255, 0.06);
    --footer-color: #555;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 2rem 1rem;
    transition: background 0.3s, color 0.3s;
    line-height: 1.5;
}

.container {
    max-width: 860px;
    margin: 0 auto;
}

/* ==================== Header ==================== */
.header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-bottom: 1.5rem;
}

.header-text {
    text-align: center;
}

h1 {
    text-align: center;
    color: var(--text-heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: color 0.3s;
}

.header-tagline {
    font-size: 0.85rem;
    color: var(--text-muted-3);
    margin-top: 0.2rem;
    font-weight: 400;
}

h2 {
    margin-bottom: 1.2rem;
    color: var(--text-heading-2);
    font-size: 1.1rem;
    font-weight: 600;
    transition: color 0.3s;
}

/* ==================== Dark Mode Toggle ==================== */
.dark-mode-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: var(--btn-secondary-bg);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    width: 48px;
    height: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 3px;
    transition: background 0.3s, border-color 0.3s;
}

.dark-mode-toggle .toggle-knob {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: transform 0.3s, background 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

[data-theme="dark"] .dark-mode-toggle .toggle-knob {
    transform: translateX(20px);
}

/* ==================== Shortcut Hints ==================== */
.shortcut-hints {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.shortcut-hint {
    font-size: 0.72rem;
    color: var(--text-muted-4);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.shortcut-hint kbd {
    background: var(--bg-settings);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 1px 5px;
    font-family: inherit;
    font-size: 0.68rem;
    box-shadow: 0 1px 0 var(--border-color);
}

/* ==================== Input Section ==================== */
.input-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: var(--shadow-card);
    margin-bottom: 2rem;
    transition: background 0.3s, box-shadow 0.3s;
}

/* ==================== Settings Panel ==================== */
.settings-panel {
    background: var(--bg-settings);
    border-radius: 12px;
    padding: 1.2rem 1.4rem;
    margin-bottom: 1.4rem;
    border: 1px solid var(--border-settings);
    transition: background 0.3s, border-color 0.3s;
}

.settings-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.settings-row:last-child {
    margin-bottom: 0;
}

.setting-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.setting-group label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
}

.setting-group input[type="text"],
.setting-group select {
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    font-size: 0.88rem;
    background: var(--bg-input);
    color: var(--text-primary);
    transition: border-color 0.2s, background 0.3s, color 0.3s, box-shadow 0.2s;
}

.setting-group input[type="text"]:focus,
.setting-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* ==================== Collapsible Details ==================== */
.settings-details {
    margin-top: 0.6rem;
    border-top: 1px solid var(--divider-bg);
}

.settings-summary {
    display: flex;
    align-items: center;
    padding: 0.6rem 0;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted-3);
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: color 0.2s;
}

.settings-summary::-webkit-details-marker {
    display: none;
}

.settings-summary::before {
    content: '▸';
    display: inline-block;
    margin-right: 0.5rem;
    font-size: 0.7rem;
    transition: transform 0.2s;
}

.settings-details[open] > .settings-summary::before {
    transform: rotate(90deg);
}

.settings-summary:hover {
    color: var(--accent);
}

.settings-details-content {
    padding-bottom: 0.4rem;
}

.settings-details-content .settings-row:first-child {
    margin-top: 0.2rem;
}

/* ==================== Divider (kept for compatibility) ==================== */
.settings-divider {
    text-align: center;
    margin: 0.8rem 0 0.6rem;
    position: relative;
}

.settings-divider::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background: var(--divider-bg);
}

.settings-divider span {
    position: relative;
    background: var(--bg-settings);
    padding: 0 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted-3);
    transition: background 0.3s;
}

.setting-group input[type="color"] {
    width: 100%;
    height: 34px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    cursor: pointer;
    padding: 2px;
    background: var(--bg-input);
}

.setting-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--slider-track);
    border-radius: 3px;
    outline: none;
    margin-top: 0.4rem;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--range-thumb);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--range-thumb);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* ==================== Palette Section ==================== */
.palette-section {
    margin-bottom: 1.4rem;
}

.palette-section > label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.palette-list {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.palette-btn {
    display: flex;
    gap: 3px;
    padding: 6px 8px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-card);
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.palette-btn:hover {
    border-color: #aaa;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.palette-btn.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.palette-btn-save {
    border-style: dashed;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-muted-4);
    padding: 6px 14px;
    align-items: center;
    justify-content: center;
}

.palette-btn-save:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.saved-palettes {
    margin-top: 0.5rem;
}

.saved-palette-wrapper {
    position: relative;
    display: inline-flex;
}

.saved-palette-delete {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #e63946;
    color: #fff;
    border: none;
    font-size: 0.7rem;
    line-height: 1;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.saved-palette-wrapper:hover .saved-palette-delete {
    display: flex;
}

.palette-btn span {
    display: block;
    width: 18px;
    height: 18px;
    border-radius: 4px;
}

/* ==================== Paste Zone ==================== */
#paste-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    margin-bottom: 1.4rem;
    background: var(--paste-zone-bg);
    outline: none;
}

#paste-zone:hover,
#paste-zone:focus {
    border-color: var(--accent);
    background: var(--paste-zone-hover-bg);
}

#paste-zone.paste-active {
    border-color: #2a9d8f;
    background: #edfcf5;
}

#paste-zone.paste-error {
    border-color: #e63946;
    background: #fff5f5;
}

[data-theme="dark"] #paste-zone.paste-active {
    background: #0a2a20;
}

[data-theme="dark"] #paste-zone.paste-error {
    background: #2a1015;
}

.paste-icon {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.paste-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

.paste-hint {
    font-size: 0.75rem;
    color: var(--text-muted-4);
}

.paste-feedback {
    margin-top: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    min-height: 1.2em;
}

.paste-feedback.success {
    color: #2a9d8f;
}

.paste-feedback.error {
    color: #e63946;
}

/* ==================== Data Table ==================== */
.table-wrapper {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.7rem 0.8rem;
    text-align: left;
}

th {
    background: var(--bg-settings);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-table-head);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s, color 0.3s;
}

th.col-drag {
    width: 30px;
    padding: 0.7rem 0.3rem;
}

td {
    border-bottom: 1px solid var(--border-color);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:nth-child(even) {
    background: var(--row-alt-bg);
}

tbody tr {
    transition: background 0.15s;
}

tbody tr:hover {
    background: var(--row-hover-bg);
}

td.col-drag-cell {
    width: 30px;
    padding: 0.7rem 0.3rem;
    cursor: grab;
    color: #bbb;
    font-size: 1.1rem;
    user-select: none;
}

td.col-drag-cell:active {
    cursor: grabbing;
}

tr.dragging {
    opacity: 0.4;
    background: var(--drag-hover-bg);
}

tr.drag-over {
    border-top: 2px solid var(--accent);
}

td input[type="text"],
td input[type="number"] {
    width: 100%;
    padding: 0.45rem 0.5rem;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 0.9rem;
    background: var(--bg-input);
    color: var(--text-primary);
    transition: border-color 0.2s, background 0.3s, color 0.3s, box-shadow 0.2s;
}

td input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

td input[type="color"] {
    width: 40px;
    height: 34px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 2px;
}

.btn-delete {
    background: none;
    border: none;
    color: #e63946;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    transition: background 0.2s;
}

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

/* ==================== Buttons ==================== */
.btn-group-secondary {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.8rem;
}

.btn {
    padding: 0.55rem 1.1rem;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
}

.btn:active {
    transform: scale(0.97);
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 2px 8px rgba(67, 97, 238, 0.3);
}

.btn-generate {
    display: block;
    width: 100%;
    padding: 0.75rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.78rem;
}

.settings-btn-row {
    display: flex;
    gap: 0.4rem;
}

.setting-group-btns {
    flex: 0 0 auto;
}

.settings-save-row {
    align-items: flex-end;
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--btn-secondary-hover);
}

.btn-danger {
    background: var(--btn-danger-bg);
    color: #e63946;
    border: 1px solid var(--btn-danger-border);
}

.btn-danger:hover {
    background: var(--btn-danger-hover);
}

/* ==================== Modal ==================== */
.modal {
    position: fixed;
    inset: 0;
    background: var(--modal-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--modal-shadow);
    transition: background 0.3s;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
}

.modal-header h3 {
    font-size: 1.1rem;
    color: var(--text-heading-2);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted-3);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

.modal-close:hover {
    background: var(--bg-settings);
}

.modal-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.modal-hint code {
    background: var(--code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.82rem;
}

#csv-input {
    width: 100%;
    height: 140px;
    padding: 0.8rem;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    font-family: monospace;
    font-size: 0.9rem;
    resize: vertical;
    margin-bottom: 1rem;
    background: var(--bg-input);
    color: var(--text-primary);
}

#csv-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.modal-actions {
    display: flex;
    gap: 0.6rem;
    justify-content: flex-end;
}

/* ==================== Chart Section ==================== */
.chart-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: var(--shadow-card);
    text-align: center;
    transition: background 0.3s, box-shadow 0.3s;
}

.chart-hint {
    font-size: 0.78rem;
    color: var(--text-muted-4);
    margin-bottom: 0.8rem;
}

#chart-wrapper {
    display: inline-block;
    padding: 1.5rem;
    background: var(--chart-wrapper-bg);
    border-radius: 12px;
    transition: background 0.3s;
}

#chart-title-display {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.2rem;
    transition: color 0.3s;
}

#chart-title-display:empty {
    display: none;
}

#chart-subtitle-display {
    font-size: 0.9rem;
    color: var(--text-muted-2);
    margin-bottom: 1rem;
    transition: color 0.3s;
}

#chart-subtitle-display:empty {
    display: none;
}

#waffle-chart-container {
    position: relative;
    display: inline-block;
    margin: 0 auto 1.2rem;
    overflow: hidden;
    border-radius: 0;
}

#waffle-chart {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 3px;
    width: 320px;
    height: 320px;
}

.waffle-cell {
    border-radius: 4px;
    transition: transform 0.15s, opacity 0.3s;
    cursor: pointer;
}

.waffle-cell:hover {
    transform: scale(1.15);
    z-index: 1;
}

/* Cell dim state for interactive legend */
.waffle-cell.cell-dimmed {
    opacity: 0.15;
    transform: scale(0.95);
}

.waffle-cell.cell-highlighted {
    transform: scale(1.05);
    box-shadow: 0 0 6px rgba(0,0,0,0.3);
}

/* Staggered Animation */
@keyframes cellFadeIn {
    from {
        opacity: 0;
        transform: scale(0.3);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.waffle-cell.animate-in {
    animation: cellFadeIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    opacity: 0;
}

/* Chart Labels */
.chart-label-overlay {
    position: absolute;
    pointer-events: none;
    font-weight: 700;
    text-align: center;
    line-height: 1.2;
    transform: translate(-50%, -50%);
    white-space: nowrap;
    z-index: 2;
}

.chart-label-overlay.has-bg {
    padding: 2px 6px;
    border-radius: 4px;
}

.waffle-cell.shape-square {
    border-radius: 0;
}

.waffle-cell.shape-rounded {
    border-radius: 4px;
}

.waffle-cell.shape-circle {
    border-radius: 50%;
}

/* ==================== Interactive Legend ==================== */
#legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: opacity 0.3s, border-color 0.3s, background 0.2s;
    user-select: none;
}

.legend-item:hover {
    background: var(--bg-settings);
}

.legend-item.legend-active {
    border-color: var(--accent);
    background: var(--paste-zone-hover-bg);
}

.legend-item.legend-dimmed {
    opacity: 0.35;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* ==================== Tooltip ==================== */
.waffle-tooltip {
    position: fixed;
    z-index: 9999;
    pointer-events: none;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 8px 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    font-size: 0.82rem;
    line-height: 1.5;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.15s, transform 0.15s;
    max-width: 200px;
}

.waffle-tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.waffle-tooltip .tooltip-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
    font-weight: 600;
    color: var(--text-heading);
}

.waffle-tooltip .tooltip-swatch {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

.waffle-tooltip .tooltip-detail {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.export-group {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    margin-top: 1.2rem;
}

/* ==================== Footer ==================== */
.app-footer {
    text-align: center;
    padding: 2rem 0 0.5rem;
    font-size: 0.72rem;
    color: var(--footer-color);
    letter-spacing: 0.03em;
}

/* ==================== Responsive ==================== */
@media (max-width: 600px) {
    body {
        padding: 1rem 0.5rem;
    }

    .input-section, .chart-section {
        padding: 1.2rem;
        border-radius: 12px;
    }

    .settings-row {
        flex-direction: column;
        gap: 0.6rem;
    }

    #waffle-chart {
        width: 260px;
        height: 260px;
    }

    th, td {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    .btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.82rem;
    }

    .btn-generate {
        padding: 0.65rem 1rem;
        font-size: 0.9rem;
    }

    .shortcut-hints {
        display: none;
    }

    .header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .dark-mode-toggle {
        position: static;
        transform: none;
    }
}