:root {
    --bg: #05020a;
    --bg-elevated: #0b0617;
    --bg-elevated-soft: #120b24;
    --accent: #7b2cff;
    --accent-soft: rgba(123, 44, 255, 0.2);
    --accent-strong: #a366ff;
    --text: #f5f3ff;
    --text-muted: #a4a0c4;
    --border-subtle: #261b46;
    --danger: #ff4b81;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-soft: 0 20px 50px rgba(0, 0, 0, 0.6);
    --transition-fast: 0.18s ease-out;
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html, body {
    margin: 0;
    padding: 0;
    background: radial-gradient(circle at top, #190b3b 0, #05020a 40%, #020008 100%);
    color: var(--text);
    font-family: var(--font-main);
    min-height: 100%;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: linear-gradient(to bottom, rgba(5,2,10,0.95), rgba(5,2,10,0.92), rgba(5,2,10,0.8));
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text);
}

.logo-mark {
    width: 18px;
    height: 18px;
    border-radius: 6px;
    background: radial-gradient(circle at 20% 20%, #ff7de5, #7b2cff);
    box-shadow: 0 0 14px rgba(123,44,255,0.8);
}

.logo-text {
    font-size: 14px;
    opacity: 0.9;
}

.nav {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 14px;
    text-decoration: none;
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text);
    border-color: var(--accent-soft);
    background: rgba(10, 7, 25, 0.8);
}

.nav-link.active {
    color: var(--text);
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    box-shadow: 0 10px 30px rgba(123, 44, 255, 0.65);
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-full {
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: var(--text);
    box-shadow: 0 14px 35px rgba(123, 44, 255, 0.6);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 45px rgba(123, 44, 255, 0.8);
}

.btn-secondary {
    background: rgba(11, 6, 23, 0.95);
    border-color: var(--border-subtle);
    color: var(--text-muted);
}

.btn-secondary:hover {
    background: var(--bg-elevated-soft);
    color: var(--text);
    border-color: var(--accent-soft);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--accent-soft);
}

.btn-ghost:hover {
    background: rgba(11, 6, 23, 0.9);
    color: var(--text);
}

.btn:disabled {
    opacity: 0.4;
    cursor: default;
    transform: none;
    box-shadow: none;
}

/* Hero */

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 28px;
    padding: 32px clamp(16px, 4vw, 40px);
}

.hero-content {
    padding-right: 16px;
}

.hero h1 {
    font-size: clamp(26px, 3vw, 34px);
    margin-bottom: 12px;
}

.hero-subtitle {
    color: var(--text-muted);
    max-width: 520px;
    margin-bottom: 20px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-preview {
    display: flex;
    align-items: stretch;
}

.card {
    background: radial-gradient(circle at top left, rgba(123,44,255,0.18), rgba(5,2,10,0.94));
    border-radius: var(--radius-xl);
    padding: 20px 18px;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.hero-steps {
    margin: 0 0 12px;
    padding-left: 18px;
    color: var(--text-muted);
    font-size: 14px;
}

.hero-note {
    font-size: 13px;
    color: var(--accent-strong);
}

/* Page layout */

.page {
    padding: 28px clamp(16px, 4vw, 40px) 40px;
}

.page h1 {
    margin-top: 0;
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--text-muted);
    margin-top: 0;
    margin-bottom: 24px;
}

.layout {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 20px;
}

.panel {
    background: rgba(5, 2, 10, 0.9);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    padding: 18px 18px 20px;
    box-shadow: var(--shadow-soft);
}

.panel-left {
    max-width: 420px;
}

.panel h2, .panel h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

/* Forms */

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

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

input[type="file"],
select {
    padding: 8px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: #070312;
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: var(--transition-fast);
}

input[type="file"]:hover,
select:hover,
input[type="file"]:focus,
select:focus {
    border-color: var(--accent-soft);
}

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

.small {
    font-size: 12px;
}

.divider {
    height: 1px;
    background: radial-gradient(circle, var(--accent-soft), transparent);
    margin: 16px 0;
}

/* Preview */

.preview-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    background: radial-gradient(circle at top left, rgba(123,44,255,0.23), #060311);
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#previewCanvas {
    max-width: 100%;
    height: auto;
    image-rendering: pixelated;
    border-radius: 12px;
    background: #05040c;
    display: block;
}

.preview-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    pointer-events: none;
}

/* Gallery */

.gallery-grid {
    display: grid;
    grid-template-columns: minmax(0, 280px);
    gap: 16px;
    max-width: 640px;
}

.gallery-placeholder {
    text-align: center;
    font-size: 14px;
}

/* Footer */

.site-footer {
    padding: 18px 24px 24px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-subtle);
    background: rgba(5, 2, 10, 0.95);
}

/* Responsive */

@media (max-width: 960px) {
    .hero {
        grid-template-columns: minmax(0, 1fr);
    }
    .hero-preview {
        order: -1;
    }
    .layout {
        grid-template-columns: minmax(0, 1fr);
    }
    .panel-left {
        max-width: none;
    }
}

@media (max-width: 640px) {
    .site-header {
        padding-inline: 16px;
    }
    .hero,
    .page {
        padding-inline: 16px;
    }
    .nav {
        gap: 6px;
    }
    .nav-link {
        padding-inline: 10px;
    }
}
.legend {
    margin-top: 12px;
    padding: 10px;
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
}

.legend-color {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 1px solid #ffffff44;
}
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    padding-top: 10px;
}

.scheme-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 16px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    transition: 0.2s ease;
}

.scheme-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(123,44,255,0.3);
    border-color: var(--accent);
}

.scheme-thumb {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #0c0618;
    border: 1px solid var(--border-subtle);
    margin-bottom: 12px;
}

.scheme-thumb img {
    width: 100%;
    display: block;
    image-rendering: pixelated;
}

.scheme-info {
    flex-grow: 1;
}

.scheme-title {
    margin: 0;
    font-size: 18px;
}

.scheme-meta {
    font-size: 13px;
    opacity: 0.7;
    margin-bottom: 14px;
}

.scheme-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn.small {
    padding: 6px 12px;
    font-size: 13px;
}

/* Заглушка */
.scheme-card.placeholder {
    text-align: center;
    opacity: 0.7;
    justify-content: center;
}
/* === Галерея карточек === */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.scheme-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 16px;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    transition: 0.2s ease;
}

.scheme-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(123,44,255,0.25);
    border-color: var(--accent);
}

.scheme-thumb {
    width: 100%;
    background: #0b0615;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    margin-bottom: 14px;
}

.scheme-thumb img {
    width: 100%;
    height: auto;
    display: block;
    image-rendering: pixelated;
}

.scheme-info {
    flex-grow: 1;
}

.scheme-title {
    margin: 0;
    font-size: 18px;
}

.scheme-meta {
    margin: 8px 0 16px;
    font-size: 13px;
    opacity: 0.8;
}

.scheme-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn.small {
    padding: 6px 12px;
    font-size: 13px;
}

/* Плейсхолдер */
.scheme-card.placeholder {
    text-align: center;
    opacity: 0.7;
    justify-content: center;
}
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.submit-block {
    background: rgba(255,255,255,0.04);
    padding: 20px;
    margin: 20px 0;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
    text-align: center;
}

.submit-block p {
    margin: 0 0 12px;
    font-size: 15px;
    opacity: 0.85;
}

.submit-btn {
    font-size: 14px;
    padding: 10px 20px;
}
/* === Главная страница === */

.home-page .hero {
    display: flex;
    gap: 40px;
    margin: 40px 0;
}

.hero-left {
    flex: 1;
}

.hero-desc {
    font-size: 16px;
    opacity: 0.85;
    margin: 10px 0 20px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 12px;
}

.hero-main-btn {
    padding: 14px 24px;
    font-size: 18px;
}

.hero-right {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.hero-box {
    padding: 20px;
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
    width: 500px;
}

.hero-box ul {
    margin: 0;
    padding-left: 20px;
}

.home-submit {
    margin-top: 40px;
}
.examples-block {
    margin: 40px 0 20px;
}

.examples-title {
    font-size: 20px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.examples-grid {
    display: flex;
    gap: 20px;
}

.example-card {
    background: rgba(255,255,255,0.04);
    padding: 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    width: 160px;
    text-align: center;
    box-shadow: var(--shadow-soft);
}

.example-card img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}
/* Расположение примеров */
.examples-block {
    margin-top: 30px;
}

.examples-title {
    font-size: 18px;
    margin-bottom: 12px;
    opacity: 0.9;
}

.examples-grid {
    display: flex;
    gap: 20px;
}

.example-card {
    background: rgba(255,255,255,0.04);
    padding: 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    width: 160px;
    text-align: center;
    box-shadow: var(--shadow-soft);
}

.example-card img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
}