:root {
    --bg-body: #020617;
    --bg-panel: #020817;
    --bg-panel-alt: #020617;
    --bg-chip: #020617;
    --bg-chip-active: #22c55e14;
    --bg-preview: #020617;
    --border-subtle: #1f2937;
    --accent: #22c55e;
    --accent-soft: #4ade80;
    --accent-strong: #16a34a;
    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
    --text-soft: #6b7280;
    --danger: #ef4444;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.9);
    --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.6);
    --gap: 24px;
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Global reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    font-family: var(--font-sans);
    background: radial-gradient(circle at top, #0f172a 0, #020617 55%, #000 100%);
    color: var(--text-main);
}

/* Layout */

.shell {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    padding: 24px 0 16px;
}

.logo-block {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: radial-gradient(circle at 30% 20%, #22c55e, #16a34a 40%, #bef264 85%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    letter-spacing: 0.03em;
    font-size: 18px;
    color: #020617;
    box-shadow: 0 12px 25px rgba(34, 197, 94, 0.35);
}

.logo-title {
    display: block;
    font-weight: 600;
    font-size: 18px;
    letter-spacing: 0.04em;
}

.logo-sub {
    display: block;
    font-size: 13px;
    color: var(--text-soft);
}

.tagline {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-soft);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    font-size: 11px;
    border-radius: 999px;
    border: 1px solid rgba(34, 197, 94, 0.35);
    color: var(--accent-soft);
    background: rgba(22, 163, 74, 0.08);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.main-wrapper {
    padding: 12px 0 40px;
}

.main-grid {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(2, 6, 23, 0.98));
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    padding: 24px 20px 26px;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 28px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    backdrop-filter: blur(14px);
}

.panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel-header h1,
.panel-header h2,
.panel-header h3 {
    margin: 0;
}

.panel-header h1 {
    font-size: 22px;
}

.panel-header h2 {
    font-size: 20px;
}

.panel-header p {
    margin: 6px 0 0;
    font-size: 14px;
    color: var(--text-soft);
}

/* Gallery */

.category-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
    margin-bottom: 10px;
}

.chip {
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: var(--bg-chip);
    color: var(--text-muted);
    padding: 4px 12px 5px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.chip:hover {
    border-color: rgba(34, 197, 94, 0.6);
    color: var(--text-main);
}

.chip--active {
    background: var(--bg-chip-active);
    color: var(--accent-soft);
    border-color: rgba(34, 197, 94, 0.9);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 4px;
    max-height: 560px;
    overflow: auto;
    padding-right: 4px;
}

/* custom slim scroll */
.gallery-grid::-webkit-scrollbar {
    width: 6px;
}
.gallery-grid::-webkit-scrollbar-track {
    background: transparent;
}
.gallery-grid::-webkit-scrollbar-thumb {
    background: rgba(55, 65, 81, 0.9);
    border-radius: 999px;
}

.svg-item {
    border-radius: 16px;
    border: 1px solid rgba(51, 65, 85, 0.8);
    background: radial-gradient(circle at top left, rgba(148, 163, 184, 0.08), rgba(15, 23, 42, 0.95));
    padding: 8px 8px 9px;
    color: inherit;
    cursor: pointer;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: all 0.18s ease;
}

.svg-item:hover {
    transform: translateY(-1px);
    border-color: rgba(34, 197, 94, 0.6);
    box-shadow: var(--shadow-sm);
}

.svg-item.selected {
    border-color: rgba(34, 197, 94, 1);
    box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.55), var(--shadow-sm);
}

.svg-thumb-inner {
    border-radius: 12px;
    overflow: hidden;
    background: radial-gradient(circle at 10% 0, #1e293b, #020617);
    display: flex;
    align-items: center;
    justify-content: center;
}

.svg-thumb-inner img {
    display: block;
    width: 100%;
    height: 132px;
    object-fit: cover;
}

.svg-item-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.11em;
    color: var(--text-soft);
}

.svg-item-label {
    font-weight: 500;
}

.svg-item-code {
    font-weight: 600;
    color: #9ca3ff;
}

/* Right side: preview & palettes */

.preview-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 16px;
}

.preview-column {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.preview-card {
    background: var(--bg-preview);
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    padding: 12px 12px 14px;
    box-shadow: var(--shadow-sm);
}

.preview-header {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 8px;
}

.preview-title {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.13em;
    color: var(--text-soft);
}

.preview-sub {
    font-size: 13px;
    color: var(--text-muted);
}

.preview-stage {
    border-radius: 14px;
    background: radial-gradient(circle at top, #111827, #020617);
    padding: 10px;
    border: 1px solid rgba(55, 65, 81, 0.9);
}

.svg-canvas {
    position: relative;
    border-radius: 12px;
    background: #020617;
    border: 1px solid rgba(55, 65, 81, 0.8);
    min-height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.svg-canvas svg {
    width: 100%;
    height: 100%;
    max-width: 260px;
    max-height: 260px;
}

.preview-placeholder {
    color: var(--text-soft);
    font-size: 13px;
    text-align: center;
}

/* Palettes */

.palette-card {
    background: var(--bg-panel-alt);
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    padding: 10px 10px 12px;
}

.palette-card h3 {
    margin: 0 0 2px;
    font-size: 14px;
}

.help-text {
    margin: 0 0 10px;
    font-size: 12px;
    color: var(--text-soft);
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 4px;
}

.swatch-btn {
    border-radius: 6px;
    border: 1px solid rgba(31, 41, 55, 0.9);
    padding: 0;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    background: transparent;
    transition: all 0.14s ease;
}

.swatch-btn span {
    position: absolute;
    left: 4px;
    bottom: 4px;
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(15, 23, 42, 0.9);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.6);
}

.swatch-btn[data-tone="dark"] span {
    color: rgba(249, 250, 251, 0.95);
    text-shadow: 0 1px 3px rgba(15, 23, 42, 0.85);
}

.swatch-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.8);
}

.swatch-btn.is-active {
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.95);
    border-color: rgba(34, 197, 94, 0.95);
}

/* Combos */

.palette-card--combos {
    min-height: 200px;
}

.combo-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 210px;
    overflow: auto;
    padding-right: 4px;
}

.combo-list::-webkit-scrollbar {
    width: 6px;
}
.combo-list::-webkit-scrollbar-track {
    background: transparent;
}
.combo-list::-webkit-scrollbar-thumb {
    background: rgba(55, 65, 81, 0.9);
    border-radius: 999px;
}

.combo-item {
    border-radius: 12px;
    border: 1px solid rgba(55, 65, 81, 0.9);
    padding: 8px 10px;
    background: radial-gradient(circle at top left, rgba(148, 163, 184, 0.16), #020617);
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.16s ease;
}

.combo-item:hover {
    border-color: rgba(34, 197, 94, 0.6);
    transform: translateY(-1px);
}

.combo-item.is-active {
    border-color: rgba(34, 197, 94, 1);
    box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.6), var(--shadow-sm);
}

.combo-swatches {
    display: flex;
    gap: 4px;
}

.combo-swatch {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    border: 1px solid rgba(31, 41, 55, 0.9);
}

.combo-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 12px;
}

.combo-name {
    font-weight: 500;
}

.combo-desc {
    font-size: 11px;
    color: var(--text-soft);
}

/* Form */

.form-card {
    background: var(--bg-panel-alt);
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    padding: 12px 12px 14px;
    margin-top: 6px;
}

.config-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 4px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.field label {
    font-size: 13px;
    color: var(--text-muted);
}

.field input,
.field textarea {
    border-radius: 10px;
    border: 1px solid rgba(55, 65, 81, 0.9);
    background: #020617;
    color: var(--text-main);
    padding: 8px 9px;
    font-family: inherit;
    font-size: 13px;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.field input::placeholder,
.field textarea::placeholder {
    color: #6b7280;
}

.field input:focus,
.field textarea:focus {
    border-color: var(--accent-soft);
    box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.6);
    background: #020617;
}

.btn-primary {
    appearance: none;
    border-radius: 999px;
    border: none;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    cursor: pointer;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #020617;
    box-shadow: 0 14px 30px rgba(34, 197, 94, 0.45);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    filter: brightness(1.02);
    box-shadow: 0 18px 35px rgba(34, 197, 94, 0.55);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 10px 22px rgba(34, 197, 94, 0.40);
}

.form-footnote {
    margin: 4px 0 0;
    font-size: 11px;
    color: var(--text-soft);
}

/* Footer */

.site-footer {
    padding: 16px 0 20px;
    font-size: 12px;
    color: var(--text-soft);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 6px;
    border-top: 1px solid rgba(31, 41, 55, 0.8);
    padding-top: 10px;
}

.footer-meta {
    color: var(--text-muted);
}

/* Responsive */

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1.1fr 1fr;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .preview-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 840px) {
    .main-grid {
        grid-template-columns: 1fr;
        padding: 18px 16px 20px;
    }

    .gallery-grid {
        max-height: 280px;
    }

    .preview-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .gallery-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .palette-grid {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }
}


/* Top navigation */
.site-nav {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 11px 6px;
    border-radius: 999px;
    border: 1px solid rgba(55, 65, 81, 0.9);
    font-size: 12px;
    color: var(--text-muted);
    text-decoration: none;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    transition: all 0.16s ease;
}

.nav-link:hover {
    color: var(--text-main);
    border-color: rgba(148, 163, 184, 0.9);
    background: rgba(15, 23, 42, 1);
    transform: translateY(-1px);
}

.nav-link--primary {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #020617;
    border-color: rgba(34, 197, 94, 0.9);
    box-shadow: 0 10px 26px rgba(34, 197, 94, 0.5);
}

.nav-link--primary:hover {
    filter: brightness(1.05);
    border-color: rgba(34, 197, 94, 1);
}

@media (max-width: 600px) {
    .site-nav {
        flex-direction: row;
    }
}