/* foto-neiro — единые стили уроков курса
   Палитра: пастельный розовый + золото + фиалковый на глубоком чёрном */

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

:root {
    --bg: #0a0a0f;
    --bg-soft: #1a0f1a;
    --bg-surface: #141420;
    --bg-surface-2: #1e1e2c;
    --bg-card: rgba(255,255,255,0.04);
    --bg-card-hover: rgba(255,255,255,0.07);
    --glass-border: rgba(255,255,255,0.08);

    --text: #e4e4e7;
    --text-dim: #a1a1aa;
    --text-bright: #fafafa;

    --accent: #f9a8d4;
    --accent-dim: rgba(249,168,212,0.12);
    --accent-glow: rgba(249,168,212,0.35);
    --accent-soft: #fce7f3;

    --gold: #fbbf24;
    --gold-dim: rgba(251,191,36,0.12);
    --gold-glow: rgba(251,191,36,0.35);

    --violet: #c4b5fd;
    --violet-dim: rgba(196,181,253,0.12);
    --violet-glow: rgba(196,181,253,0.3);

    --green: #86efac;
    --green-dim: rgba(134,239,172,0.12);
    --yellow: #fde68a;
    --yellow-dim: rgba(253,230,138,0.12);
    --red: #fda4af;
    --red-dim: rgba(253,164,175,0.12);

    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Onest', -apple-system, sans-serif;
    --mono: 'JetBrains Mono', 'Consolas', monospace;
    --sidebar-w: 260px;
    --header-h: 64px;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Фоновые орбы для эстетики */
body::before {
    content: '';
    position: fixed;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
}
body::after {
    content: '';
    position: fixed;
    bottom: -200px;
    left: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--violet-glow), transparent 70%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-soft); }

/* HEADER */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    padding: 0 24px;
}
.header-inner {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--text-bright);
    letter-spacing: -0.01em;
}
.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #0a0a0f;
    font-weight: 800;
    box-shadow: 0 0 20px var(--accent-glow);
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-dim);
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--text); }

/* LAYOUT */
.layout {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - var(--header-h));
}

/* SIDEBAR */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    padding: 32px 0 32px 24px;
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 3px; }

.toc-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    margin-bottom: 16px;
}
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 4px; }
.toc-list a {
    display: block;
    padding: 6px 12px;
    font-size: 0.82rem;
    color: var(--text-dim);
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: all 0.2s;
    line-height: 1.4;
}
.toc-list a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.03);
}
.toc-list a.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: var(--accent-dim);
}
.toc-list .toc-h3 { padding-left: 24px; font-size: 0.78rem; }

/* CONTENT */
.content {
    flex: 1;
    min-width: 0;
    max-width: 820px;
    padding: 40px 48px 80px;
}

.lesson-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.lesson-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid rgba(249,168,212,0.25);
}
.reading-time {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-dim);
}

.lesson-title {
    font-family: var(--font-display);
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--text-bright);
    line-height: 1.2;
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}
.lesson-title span {
    background: linear-gradient(135deg, var(--accent), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* TYPOGRAPHY */
.content h2 {
    font-family: var(--font-display);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-bright);
    margin: 48px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--glass-border);
    letter-spacing: -0.01em;
    scroll-margin-top: 80px;
}
.content h3 {
    font-family: var(--font-display);
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--text-bright);
    margin: 32px 0 12px;
    scroll-margin-top: 80px;
}
.content p { margin-bottom: 16px; color: var(--text); }
.content strong { color: var(--text-bright); font-weight: 600; }
.content em { color: var(--accent-soft); font-style: italic; }
.content ul, .content ol { margin-bottom: 16px; padding-left: 24px; }
.content li { margin-bottom: 8px; }
.content img {
    max-width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    margin: 24px 0;
}

.content code:not(pre code) {
    font-family: var(--mono);
    font-size: 0.88em;
    background: var(--bg-surface-2);
    color: var(--accent-soft);
    padding: 2px 7px;
    border-radius: 5px;
    border: 1px solid var(--glass-border);
}

/* CODE BLOCKS */
.code-block {
    position: relative;
    margin: 24px 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}
.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--glass-border);
}
.code-lang {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.code-copy, .prompt-copy {
    background: none;
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    font-size: 0.75rem;
    font-family: var(--font);
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}
.code-copy:hover {
    color: var(--text);
    border-color: rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
}
.code-block pre {
    padding: 20px;
    background: var(--bg-surface);
    overflow-x: auto;
    margin: 0;
}
.code-block code {
    font-family: var(--mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: #d4d4d8;
    white-space: pre;
}

/* PROMPT BLOCK */
.prompt-block {
    position: relative;
    margin: 28px 0;
    background: linear-gradient(135deg, rgba(249,168,212,0.08), rgba(251,191,36,0.04));
    border: 1px solid rgba(249,168,212,0.25);
    border-left: 4px solid var(--accent);
    border-radius: var(--radius);
    overflow: hidden;
}
.prompt-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: rgba(249,168,212,0.08);
    border-bottom: 1px solid rgba(249,168,212,0.15);
}
.prompt-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
}
.prompt-copy {
    border-color: rgba(249,168,212,0.3);
    color: var(--accent);
}
.prompt-copy:hover {
    background: rgba(249,168,212,0.15);
    border-color: rgba(249,168,212,0.5);
}
.prompt-body {
    padding: 20px;
    font-family: var(--mono);
    font-size: 0.88rem;
    line-height: 1.7;
    color: #fce7f3;
    white-space: pre-wrap;
}

/* TRY BLOCK */
.try-block {
    margin: 28px 0;
    padding: 24px;
    background: linear-gradient(135deg, var(--violet-dim), rgba(196,181,253,0.04));
    border: 1px solid rgba(196,181,253,0.25);
    border-left: 4px solid var(--violet);
    border-radius: var(--radius);
}
.try-block-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--violet);
    margin-bottom: 12px;
    font-family: var(--font-display);
}
.try-block p { color: var(--text); margin-bottom: 8px; }
.try-block p:last-child { margin-bottom: 0; }
.try-block ol, .try-block ul { padding-left: 20px; margin-bottom: 8px; }
.try-block li { margin-bottom: 6px; }

/* WARNING */
.warning-block {
    margin: 28px 0;
    padding: 24px;
    background: linear-gradient(135deg, var(--yellow-dim), rgba(253,230,138,0.04));
    border: 1px solid rgba(253,230,138,0.25);
    border-left: 4px solid var(--yellow);
    border-radius: var(--radius);
}
.warning-block-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--yellow);
    margin-bottom: 12px;
    font-family: var(--font-display);
}
.warning-block p, .warning-block li { color: var(--text); }
.warning-block ul, .warning-block ol { padding-left: 20px; margin-bottom: 8px; }
.warning-block li { margin-bottom: 6px; }

/* SUCCESS */
.success-block {
    margin: 28px 0;
    padding: 24px;
    background: linear-gradient(135deg, var(--green-dim), rgba(134,239,172,0.04));
    border: 1px solid rgba(134,239,172,0.25);
    border-left: 4px solid var(--green);
    border-radius: var(--radius);
}
.success-block-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--green);
    margin-bottom: 12px;
    font-family: var(--font-display);
}
.success-block p, .success-block li { color: var(--text); }
.success-block ul, .success-block ol { padding-left: 20px; margin-bottom: 8px; }
.success-block li { margin-bottom: 6px; }

/* STEPS */
.steps {
    list-style: none;
    counter-reset: step-counter;
    padding: 0;
    margin: 24px 0;
}
.steps li {
    counter-increment: step-counter;
    position: relative;
    padding: 20px 20px 20px 72px;
    margin-bottom: 12px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    min-height: 64px;
    backdrop-filter: blur(10px);
}
.steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 20px;
    top: 18px;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    color: #0a0a0f;
    border-radius: 50%;
    font-weight: 800;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.steps li strong { color: var(--text-bright); display: block; margin-bottom: 4px; font-family: var(--font-display); }

/* TABLE */
.table-wrap {
    margin: 24px 0;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    overflow: hidden;
}
.content table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
}
.content th {
    background: var(--bg-surface);
    color: var(--text-bright);
    text-align: left;
    padding: 12px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid var(--glass-border);
    font-family: var(--font-display);
}
.content td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 0.9rem;
}
.content tr:last-child td { border-bottom: none; }

/* CHECKLIST */
.checklist {
    list-style: none;
    padding-left: 0;
}
.checklist li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 10px;
}
.checklist li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    width: 22px;
    height: 22px;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
}

/* CTA BLOCK */
.cta-block {
    margin: 40px 0;
    padding: 32px;
    background: linear-gradient(135deg, rgba(249,168,212,0.08), rgba(251,191,36,0.05));
    border: 1px solid rgba(249,168,212,0.2);
    border-radius: var(--radius);
    text-align: center;
}
.cta-block h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--text-bright);
    margin-bottom: 8px;
}
.cta-block p { color: var(--text-dim); margin-bottom: 20px; }
.cta-btn {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    color: #0a0a0f;
    font-weight: 700;
    border-radius: 999px;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 0 30px var(--accent-glow);
}
.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px var(--accent-glow);
    color: #0a0a0f;
}

/* LESSON NAV */
.lesson-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--glass-border);
}
.lesson-nav a {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    transition: all 0.25s;
    backdrop-filter: blur(10px);
}
.lesson-nav a:hover {
    border-color: rgba(249,168,212,0.3);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}
.lesson-nav .nav-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 6px;
}
.lesson-nav .nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-bright);
}
.lesson-nav .nav-next { text-align: right; }

/* FOOTER */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 32px 24px;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.85rem;
}
.footer a { color: var(--accent); }

/* MOBILE */
@media (max-width: 1024px) {
    .sidebar { display: none; }
    .content { padding: 24px 20px 60px; max-width: 100%; }
    .lesson-title { font-size: 1.7rem; }
}
@media (max-width: 640px) {
    .header { padding: 0 16px; }
    .breadcrumb { display: none; }
    .lesson-title { font-size: 1.4rem; }
    .content h2 { font-size: 1.25rem; }
    .lesson-nav { grid-template-columns: 1fr; }
    .steps li { padding-left: 60px; }
    .steps li::before { left: 14px; width: 32px; height: 32px; font-size: 0.8rem; }
    .prompt-body { font-size: 0.8rem; }
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--bg-surface-2); border-radius: 3px; }