style.css

/* ================================================================
   MTG Proxy Builder — Design System
   Inspired by shadcn/ui theming with custom colour palette.
   Uses CSS custom properties (OKLCH) + semantic tokens.
   ================================================================ */

/* ── Colour Palette ──────────────────────────────────────── */
:root {
    /* Mauve — primary accent */
    --mauve-50:  oklch(93.91% 0.037 306.42);
    --mauve-100: oklch(88.14% 0.074 306.26);
    --mauve-200: oklch(76.63% 0.149 304.80);
    --mauve-300: oklch(65.96% 0.220 302.08);
    --mauve-400: oklch(57.39% 0.272 297.96);
    --mauve-500: oklch(52.08% 0.293 290.98);
    --mauve-600: oklch(44.15% 0.248 291.47);
    --mauve-700: oklch(35.85% 0.200 292.27);
    --mauve-800: oklch(27.17% 0.150 294.52);
    --mauve-900: oklch(17.60% 0.095 298.87);
    --mauve-950: oklch(14.56% 0.077 301.86);

    /* Lavender Purple — secondary */
    --lavender-purple-50:  oklch(95.25% 0.012 291.29);
    --lavender-purple-100: oklch(90.49% 0.023 294.03);
    --lavender-purple-200: oklch(80.63% 0.051 294.15);
    --lavender-purple-300: oklch(70.73% 0.077 292.97);
    --lavender-purple-400: oklch(60.41% 0.108 291.09);
    --lavender-purple-500: oklch(50.25% 0.137 288.76);
    --lavender-purple-600: oklch(42.96% 0.115 288.90);
    --lavender-purple-700: oklch(35.57% 0.089 289.75);
    --lavender-purple-800: oklch(27.54% 0.065 290.42);
    --lavender-purple-900: oklch(19.07% 0.034 290.91);
    --lavender-purple-950: oklch(16.35% 0.025 291.01);

    /* Deep Sky Blue — accent / highlights */
    --deep-sky-blue-50:  oklch(96.32% 0.022 230.54);
    --deep-sky-blue-100: oklch(93% 0.042 229.44);
    --deep-sky-blue-200: oklch(86.41% 0.083 230.61);
    --deep-sky-blue-300: oklch(80.39% 0.119 232.69);
    --deep-sky-blue-400: oklch(75.13% 0.148 236.31);
    --deep-sky-blue-500: oklch(70.72% 0.168 242.04);
    --deep-sky-blue-600: oklch(59.98% 0.141 241.55);
    --deep-sky-blue-700: oklch(48.74% 0.113 240.76);
    --deep-sky-blue-800: oklch(36.80% 0.083 239.21);
    --deep-sky-blue-900: oklch(23.78% 0.050 235);
    --deep-sky-blue-950: oklch(19.63% 0.040 231.93);

    /* Taupe — neutral base */
    --taupe-50:  oklch(96.16% 0.002 67.80);
    --taupe-100: oklch(92.37% 0.004 56.37);
    --taupe-200: oklch(84.53% 0.007 53.43);
    --taupe-300: oklch(76.56% 0.012 54.45);
    --taupe-400: oklch(68.32% 0.015 53.25);
    --taupe-500: oklch(59.69% 0.020 48.36);
    --taupe-600: oklch(51.07% 0.016 53.13);
    --taupe-700: oklch(41.91% 0.014 54.22);
    --taupe-800: oklch(32.13% 0.009 53.17);
    --taupe-900: oklch(21.61% 0.006 56.04);
    --taupe-950: oklch(17.96% 0.004 48.50);

    /* Charcoal Brown — card / sidebar surfaces */
    --charcoal-brown-50:  oklch(96.31% 0.002 145.56);
    --charcoal-brown-100: oklch(92.39% 0.002 145.56);
    --charcoal-brown-200: oklch(84.79% 0.006 137.78);
    --charcoal-brown-300: oklch(76.92% 0.008 132.43);
    --charcoal-brown-400: oklch(68.77% 0.010 134.90);
    --charcoal-brown-500: oklch(60.36% 0.012 136.59);
    --charcoal-brown-600: oklch(51.54% 0.010 134.93);
    --charcoal-brown-700: oklch(42.32% 0.009 132.52);
    --charcoal-brown-800: oklch(32.46% 0.008 137.81);
    --charcoal-brown-900: oklch(21.63% 0.002 145.49);
    --charcoal-brown-950: oklch(18.18% 0.002 106.60);

    /* ── Semantic Tokens (shadcn-style) ───────────────────── */
    --background:           var(--taupe-950);
    --foreground:           var(--taupe-100);

    --card:                 var(--charcoal-brown-900);
    --card-foreground:      var(--taupe-100);

    --popover:              var(--charcoal-brown-900);
    --popover-foreground:   var(--taupe-100);

    --primary:              var(--mauve-500);
    --primary-foreground:   var(--mauve-50);

    --secondary:            var(--lavender-purple-800);
    --secondary-foreground: var(--lavender-purple-100);

    --muted:                var(--taupe-800);
    --muted-foreground:     var(--taupe-400);

    --accent:               var(--deep-sky-blue-700);
    --accent-foreground:    var(--deep-sky-blue-50);

    --destructive:          var(--mauve-600);
    --destructive-foreground: var(--mauve-50);

    --border:               var(--taupe-800);
    --input:                var(--taupe-800);
    --ring:                 var(--mauve-500);

    --radius:               0.5rem;

    /* ── Derived helpers ──────────────────────────────────── */
    --sidebar-bg:           var(--charcoal-brown-900);
    --sidebar-border:       var(--taupe-800);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 Helvetica, Arial, sans-serif;
    background: var(--background);
    color: var(--foreground);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Layout ===== */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.5px;
}

header .subtitle {
    font-size: 0.8rem;
    color: var(--muted-foreground);
}

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ===== Sidebar (Input & Settings) ===== */
.sidebar {
    width: 340px;
    min-width: 340px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar-section {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-section h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted-foreground);
    margin-bottom: 10px;
}

/* ===== Card List Input ===== */
textarea#cardList {
    width: 100%;
    height: 140px;
    background: var(--background);
    border: 1px solid var(--input);
    border-radius: var(--radius);
    color: var(--foreground);
    font-family: 'Consolas', 'Fira Code', monospace;
    font-size: 0.85rem;
    padding: 10px;
    resize: vertical;
    line-height: 1.5;
    transition: border-color 0.15s, box-shadow 0.15s;
}

textarea#cardList::placeholder {
    color: var(--taupe-600);
}

textarea#cardList:focus {
    outline: none;
    border-color: var(--ring);
    box-shadow: 0 0 0 2px oklch(52.08% 0.293 290.98 / 0.2);
}

.input-help {
    font-size: 0.72rem;
    color: var(--taupe-600);
    margin-top: 6px;
    line-height: 1.4;
}

/* ===== Settings Controls ===== */
.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

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

.setting-row label {
    font-size: 0.82rem;
    color: var(--taupe-200);
}

.setting-row select,
.setting-row input[type="color"],
.setting-row input[type="range"] {
    background: var(--background);
    border: 1px solid var(--input);
    color: var(--foreground);
    border-radius: calc(var(--radius) - 2px);
    padding: 4px 8px;
    font-size: 0.8rem;
}

.setting-row select {
    min-width: 130px;
    cursor: pointer;
}

.setting-row select:focus {
    outline: none;
    border-color: var(--ring);
}

.setting-row input[type="color"] {
    width: 36px;
    height: 28px;
    padding: 2px;
    cursor: pointer;
    border-radius: calc(var(--radius) - 2px);
}

.setting-row input[type="range"] {
    width: 100px;
    cursor: pointer;
    accent-color: var(--primary);
}

.range-value {
    font-size: 0.75rem;
    color: var(--muted-foreground);
    min-width: 36px;
    text-align: right;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    border-radius: var(--radius);
    padding: 10px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-foreground);
}

.btn-primary:hover:not(:disabled) {
    background: var(--mauve-600);
}

.btn-download {
    background: var(--secondary);
    color: var(--secondary-foreground);
    border: 1px solid var(--lavender-purple-700);
}

.btn-download:hover:not(:disabled) {
    background: var(--lavender-purple-700);
}

.btn-clear {
    background: transparent;
    color: var(--muted-foreground);
    border: 1px solid var(--border);
    margin-top: 8px;
}

.btn-clear:hover:not(:disabled) {
    background: var(--muted);
    color: var(--taupe-200);
}

/* ===== Progress ===== */
.progress-container {
    margin-top: 12px;
    display: none;
}

.progress-container.active {
    display: block;
}

.progress-bar-track {
    width: 100%;
    height: 6px;
    background: var(--muted);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    width: 0%;
    transition: width 0.2s ease;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--muted-foreground);
    margin-top: 4px;
}

/* ===== Error Log ===== */
.error-log {
    margin-top: 10px;
}

.error-item {
    background: oklch(52.08% 0.293 290.98 / 0.1);
    border-left: 3px solid var(--primary);
    padding: 6px 10px;
    margin-bottom: 4px;
    font-size: 0.75rem;
    color: var(--mauve-400);
    border-radius: 0 calc(var(--radius) - 2px) calc(var(--radius) - 2px) 0;
}

/* ===== Preview Area ===== */
.preview-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

/* ===== Stats Bar ===== */
.stats-bar {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--card);
    padding: 12px 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 960px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted-foreground);
}

.stats-bar .divider {
    width: 1px;
    height: 32px;
    background: var(--border);
}

/* ===== Page Previews ===== */
.page-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    width: 100%;
    max-width: 700px;
}

.page-wrapper {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.page-canvas {
    background: #fff;
    border-radius: calc(var(--radius) - 2px);
    box-shadow: 0 4px 24px oklch(0% 0 0 / 0.5);
    max-width: 100%;
    height: auto;
}

/* ===== Empty State ===== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--taupe-600);
    gap: 12px;
    text-align: center;
    padding: 40px;
}

.empty-state .icon {
    font-size: 3rem;
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.9rem;
    max-width: 320px;
    line-height: 1.5;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--background); }
::-webkit-scrollbar-thumb { background: var(--taupe-800); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--taupe-700); }

/* ===== Database Status Footer ===== */
.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    border-bottom: none;
}

.db-status {
    font-size: 0.7rem;
    color: var(--taupe-600);
    text-align: center;
    line-height: 1.4;
}

/* ===== Responsive ===== */
@media (max-width: 800px) {
    .main-content {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        min-width: unset;
        max-height: 50vh;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

/* ================================================================
   Card List Panel — Variant Selection View
   ================================================================ */

.card-list-panel {
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 960px;
    gap: 12px;
}

/* ── Stats summary row ── */
.cl-stats {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--muted-foreground);
    padding: 10px 14px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
}

.cl-stats strong {
    color: var(--foreground);
}

.cl-stats-sep {
    color: var(--taupe-600);
}

/* ── Card list container ── */
.cl-container {
    display: grid;
    grid-template-columns: repeat(3, minmax(300px, 1fr));
    gap: 15px;
    width: 100%;
}

@media (max-width: 900px) {
    .cl-container {
        grid-template-columns: repeat(2, minmax(300px, 1fr));
    }
}

@media (max-width: 600px) {
    .cl-container {
        grid-template-columns: minmax(300px, 1fr);
    }
}

/* ── Individual card row ── */
.cl-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    transition: border-color 0.15s;
}

.cl-row:hover {
    border-color: var(--taupe-700);
}

.cl-row-error {
    border-color: var(--mauve-700);
    opacity: 0.7;
}

/* ── Thumbnail wrapper ── */
.cl-thumb-wrap {
    position: relative;
    width: 100%;
    cursor: pointer;
    border-radius: calc(var(--radius) - 2px);
    overflow: visible;
}

.cl-thumb {
    width: 100%;
    height: auto;
    aspect-ratio: 488 / 680;
    object-fit: cover;
    border-radius: calc(var(--radius) - 2px);
    display: block;
    background: var(--muted);
}

.cl-variant-btn {
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--primary-foreground);
    border: none;
    border-radius: 10px;
    font-size: 0.62rem;
    font-weight: 600;
    padding: 1px 6px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
    line-height: 1.4;
}

.cl-variant-btn:hover {
    background: var(--mauve-600);
}

/* ── Row info ── */
.cl-row-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    min-width: 0;
    flex-wrap: wrap;
}

.cl-qty {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary);
    min-width: 28px;
}

.cl-name {
    font-size: 0.82rem;
    color: var(--foreground);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    text-align: center;
}

.cl-set {
    font-size: 0.7rem;
    color: var(--muted-foreground);
    background: var(--muted);
    padding: 1px 6px;
    border-radius: 8px;
    white-space: nowrap;
}

.cl-dfc-badge {
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--deep-sky-blue-300);
    background: oklch(48.74% 0.113 240.76 / 0.15);
    padding: 1px 5px;
    border-radius: 6px;
}

.cl-error-badge {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--mauve-400);
    background: oklch(52.08% 0.293 290.98 / 0.1);
    padding: 1px 6px;
    border-radius: 6px;
}

/* ================================================================
   Variant Popover
   ================================================================ */

.variant-popover {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 100;
    margin-top: 6px;
    background: var(--popover);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px oklch(0% 0 0 / 0.5);
    min-width: 280px;
    max-width: 420px;
    max-height: 360px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: popoverIn 0.12s ease-out;
}

@keyframes popoverIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.vp-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.vp-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--foreground);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vp-count {
    font-size: 0.7rem;
    color: var(--muted-foreground);
    white-space: nowrap;
}

.vp-close {
    background: none;
    border: none;
    color: var(--muted-foreground);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
    transition: color 0.15s;
}

.vp-close:hover {
    color: var(--foreground);
}

/* ── Variant Grid ── */
.vp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    padding: 10px;
    overflow-y: auto;
    max-height: 300px;
}

.vp-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    padding: 6px;
    border: 2px solid transparent;
    border-radius: calc(var(--radius) - 1px);
    transition: border-color 0.15s, background 0.15s;
}

.vp-option:hover {
    background: var(--muted);
    border-color: var(--taupe-700);
}

.vp-option-selected {
    border-color: var(--primary);
    background: oklch(52.08% 0.293 290.98 / 0.08);
}

.vp-thumb {
    width: 70px;
    height: 98px;
    object-fit: cover;
    border-radius: calc(var(--radius) - 2px);
    background: var(--muted);
    display: block;
}

.vp-label {
    font-size: 0.62rem;
    color: var(--muted-foreground);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* ================================================================
   Preview Panel
   ================================================================ */

.preview-panel {
    flex-direction: column;
    align-items: center;
    width: 100%;
}

/* ── Secondary button (Back to Cards) ── */
.btn-secondary {
    background: transparent;
    color: var(--muted-foreground);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--muted);
    color: var(--foreground);
}

/* ── Button spacing within actions section ── */
.sidebar-section .btn + .btn {
    margin-top: 8px;
}