/* ── Базовые настройки ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0d0d0d;
    --border: #222222;
    --border-hover: #333333;
    --text: #efefef;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --accent: #c8f135;
    --font: 'Inter', -apple-system, sans-serif;
    --mono: 'JetBrains Mono', monospace;
    --max-w: 860px;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ── Навигация ── */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 14px 40px;
    display: flex;
    justify-content: center;
    background: rgba(13, 13, 13, 0.6);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.nav.scrolled {
    border-bottom-color: var(--border);
}

.nav-inner {
    width: 100%;
    max-width: var(--max-w);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--mono);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text);
    letter-spacing: -0.02em;
}

.nav-logo .dot { color: var(--accent); }

.nav-contact {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 7px 16px;
    border: 1px solid var(--border);
    border-radius: 7px;
    transition: all 0.2s;
}

.nav-contact:hover {
    color: var(--text);
    border-color: var(--border-hover);
}

/* ── Hero ── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 40px 80px;
}

.hero-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    width: 100%;
}

.hero-label {
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 28px;
}

.hero-name {
    font-size: clamp(3.5rem, 10vw, 7.5rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
    color: var(--text);
}

.hero-bio {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 480px;
    line-height: 1.75;
    margin-bottom: 40px;
}

.hero-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hero-stack span {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: #c0c0c0;
    padding: 6px 13px;
    border: 1px solid #3a3a3a;
    border-radius: 5px;
    letter-spacing: 0.02em;
    transition: all 0.2s;
    cursor: default;
    user-select: none;
}

.hero-stack span:hover {
    color: var(--text);
    border-color: #555555;
    background: rgba(255,255,255,0.04);
}

/* ── Проекты ── */
.projects {
    padding: 40px 40px 100px;
}

.projects-inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

/* ── Строка проекта ── */
.project {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-rows: auto auto auto;
    gap: 18px;
    position: relative;
    transition: padding 0.25s;
}

.project:last-child {
    border-bottom: 1px solid var(--border);
}

/* Акцентная полоска слева при hover */
.project::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: var(--accent);
    border-radius: 2px;
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project:hover::before {
    transform: scaleY(1);
}

/* ── Шапка проекта: номер + название + категория ── */
.project-head {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.project-title-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.project-num {
    font-family: var(--mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.06em;
    flex-shrink: 0;
}

.project-name {
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text);
    line-height: 1.1;
    transition: color 0.2s;
}

.project:hover .project-name {
    color: var(--accent);
}

.project-category {
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: #b0b0b0;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 3px 9px;
    border: 1px solid #3a3a3a;
    border-radius: 4px;
    align-self: center;
    transition: border-color 0.2s, color 0.2s;
    cursor: default;
    user-select: none;
}

.project:hover .project-category {
    border-color: #555555;
    color: #d0d0d0;
}

/* Стек технологий — горизонтальная строка с разделителями */
.project-stack {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
}

.project-stack span {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: #b0b0b0;
    letter-spacing: 0.02em;
    transition: color 0.2s;
    cursor: default;
    user-select: none;
}

.project-stack span + span::before {
    content: '·';
    margin: 0 10px;
    color: #444444;
}

.project:hover .project-stack span {
    color: #d0d0d0;
}

/* ── Описание ── */
.project-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 640px;
}

/* ── Кнопки ── */
.project-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    text-decoration: none;
    padding: 9px 18px;
    border-radius: 7px;
    border: 1px solid var(--accent);
    transition: all 0.2s;
}

.btn-demo:hover {
    background: transparent;
    color: var(--accent);
}

.btn-demo svg {
    transition: transform 0.2s;
}

.btn-demo:hover svg {
    transform: translateX(3px);
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.875rem;
    font-weight: 500;
    color: #b0b0b0;
    text-decoration: none;
    padding: 9px 18px;
    border-radius: 7px;
    border: 1px solid #3a3a3a;
    transition: all 0.2s;
}

.btn-github:hover {
    color: #d0d0d0;
    border-color: #555555;
}

.btn-github[data-disabled] {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* ── Футер ── */
.footer {
    padding: 28px 40px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
}

.footer-inner {
    width: 100%;
    max-width: var(--max-w);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-inner span {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* ── Адаптивность ── */
@media (max-width: 768px) {
    .nav { padding: 12px 20px; }

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero-name { font-size: clamp(2.75rem, 14vw, 5rem); }
    .hero-bio { font-size: 1rem; }

    .projects { padding: 20px 20px 80px; }

    .project::before { display: none; }

    .project-name { font-size: 1.5rem; }

    .footer { padding: 24px 20px; }
    .footer-inner { flex-direction: column; gap: 6px; text-align: center; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2.5rem; }
    .project-name { font-size: 1.375rem; }
    .project-title-row { gap: 10px; }
    .btn-demo, .btn-github { width: 100%; justify-content: center; }
}