@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Crimson+Pro:ital,wght@0,400;1,400&display=swap');

:root {
    --bg: #050505;
    --copper: #b87333;
    --phosphor: #00ff41;
    --iron: #1a1a1a;
    --steel: #4a4a4a;
    --max-width: 1200px;
}

* {
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
    max-width: 100%;
}

body {
    background-color: var(--bg);
    color: #ccc;
    font-family: 'JetBrains Mono', monospace;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    scroll-behavior: smooth;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

/* Единая сетка на фоне */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(var(--iron) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    opacity: 0.3;
}

/* Шапка с навигацией */
#main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--iron);
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.main-nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
    width: 100%;
}

.nav-brand {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: bold;
    color: var(--copper);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--steel);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s;
    padding: 5px 0;
    border-bottom: 1px solid transparent;
}

.nav-menu a:hover {
    color: var(--phosphor);
    border-bottom-color: var(--phosphor);
}

/* Глобальный ограничитель ширины для всех секций */
section, footer {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 40px;
    border-left: 1px solid var(--iron);
    border-right: 1px solid var(--iron);
    border-bottom: 1px solid var(--iron);
    display: block;
    box-sizing: border-box;
}

/* Типографика */
h1, h2, h3 {
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--copper);
    margin: 0 0 20px 0;
}

strong, b {
    color: var(--copper);
}

h1 {
    font-size: 0.9rem;
    line-height: 1.2;
    color: var(--copper);
    border-bottom: 2px solid var(--steel);
    padding-bottom: 10px;
}

h2 {
    font-size: 1.5rem;
    border-bottom: 1px solid var(--iron);
    padding-bottom: 10px;
}

h3 {
    font-size: 1.2rem;
    border-bottom: 1px solid var(--iron);
    padding-bottom: 8px;
}

.highlight {
    color: var(--phosphor);
}

.copper {
    color: var(--copper);
}

.label {
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: var(--steel);
    text-transform: uppercase;
    margin-bottom: 15px;
    display: block;
}

.desc-box, .lead-text {
    line-height: 1.8;
    margin-top: 20px;
    font-size: 1rem;
    max-width: 100%;
}

/* Сетки */
.grid-2, .grid-3, .spec-grid, .stack-grid, .feature-grid, .grid-container {
    display: grid;
    gap: 20px;
    margin: 30px 0;
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

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

.full-width {
    grid-column: span 2;
}

/* Карточки */
.card, .feat {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--iron);
    padding: 25px;
    transition: border-color 0.3s;
}

.card:hover, .feat:hover {
    border-color: var(--steel);
}

.card h3, .feat h3 {
    color: var(--copper);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.spec-item, .stack-item {
    border: 1px solid var(--iron);
    background: #080808;
    padding: 25px;
    transition: border-color 0.3s;
}

.spec-item:hover {
    border-color: var(--steel);
}

.metric {
    font-size: 1.3rem;
    font-weight: bold;
    color: #fff;
    margin: 5px 0;
}

/* Кнопки */
.btn, .btn.secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: #0a0a0a;
    border: 1px solid var(--steel);
    color: var(--steel);
    cursor: pointer;
    font-family: inherit;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 1px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn.secondary {
    background: transparent;
    border-color: var(--steel);
    color: var(--steel);
}

.btn:hover, .btn.secondary:hover {
    border-color: var(--phosphor);
    color: var(--phosphor);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.1);
    transform: translateY(-1px);
}

/* Формы */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--steel);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input:not([type="submit"]):not([type="button"]):not([type="checkbox"]):not([type="radio"]),
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--iron);
    color: #ccc;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--phosphor);
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.1);
}

.form-group input[type="submit"],
.form-group input[type="button"] {
    width: auto;
    padding: 12px 24px;
    background: #0a0a0a;
    border: 1px solid var(--steel);
    color: var(--steel);
    cursor: pointer;
    font-family: inherit;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 1px;
    transition: all 0.3s;
}

.form-group input[type="submit"]:hover,
.form-group input[type="button"]:hover {
    border-color: var(--phosphor);
    color: var(--phosphor);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.1);
}

/* Бейджи */
.badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 0 0 18px;
}

.badge {
    padding: 8px 12px;
    border-radius: 999px;
    background: #0f1420;
    border: 1px solid var(--iron);
    color: #cfe1ff;
    font-size: 13px;
}

/* Код */
pre {
    margin: 0;
    background: #0a0f19;
    border: 1px solid var(--iron);
    border-radius: 4px;
    padding: 14px;
    overflow: auto;
}

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

.code-card {
    padding: 16px;
}

/* Таблицы */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--iron);
    border-radius: 4px;
    overflow: hidden;
    margin: 20px 0;
}

th, td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--iron);
}

th {
    font-size: 14px;
    color: var(--copper);
    background: rgba(255, 255, 255, 0.03);
    text-transform: uppercase;
    letter-spacing: 1px;
}

tr:last-child td {
    border-bottom: none;
}

.tick {
    color: var(--phosphor);
    font-weight: 700;
}

.dash {
    color: #ff9b9b;
    font-weight: 700;
}

/* Текст */
p {
    margin: 0 0 10px;
    line-height: 1.8;
}

.note {
    font-size: 13px;
    color: var(--steel);
}

.text-block {
    line-height: 1.8;
    margin: 20px 0;
}

/* KPI */
.kpi {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.kpi .item {
    flex: 1 1 160px;
    padding: 16px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--iron);
}

.kpi .num {
    font-size: 20px;
    font-weight: 800;
    color: var(--copper);
}

.kpi .lbl {
    color: var(--steel);
    font-size: 13px;
}

/* Hero секция */
.hero {
    padding: 48px 0 24px;
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 28px;
    align-items: center;
}

.hero h1 {
    font-size: clamp(18px, 2.1vw, 24px);
    line-height: 1.15;
    margin: 0 0 14px;
}

.hero p.lead {
    color: var(--steel);
    font-size: clamp(16px, 2vw, 18px);
    margin: 0 0 22px;
}

/* CTA */
.cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Footer */
footer {
    margin-top: 32px;
    padding: 28px 40px 18px;
    color: var(--steel);
    border-top: 1px solid var(--iron);
}

footer > * {
    margin: 0;
}

.footer-note {
    margin-top: 10px;
    font-size: 0.7rem;
    color: var(--steel);
    text-align: center;
}

/* Языковой переключатель */
.lang {
    margin-left: 6px;
    font-size: 14px;
    opacity: 0.9;
}

.lang a {
    color: var(--steel);
    text-decoration: none;
}

.lang a.active {
    color: var(--copper);
    font-weight: 700;
}

.lang a:hover {
    color: var(--phosphor);
}

/* Thumbs */
.thumbs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.thumbs a {
    display: block;
    flex: 0 0 120px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--iron);
}

.thumbs img {
    display: block;
    width: 100%;
    height: 72px;
    object-fit: cover;
}

/* Цвета для кода */
.code-key {
    color: deepskyblue;
}

.code-str {
    color: orangered;
}

.code-prep {
    color: dimgray;
}

.code-comment {
    color: forestgreen;
}

.code-class {
    color: lawngreen;
}

.code-func {
    color: yellow;
}

.code-var {
    color: mediumpurple;
}

/* Мобильная адаптация */
@media (max-width: 980px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .grid-3, .grid-2, .spec-grid, .stack-grid, .feature-grid, .grid-container {
        grid-template-columns: 1fr;
    }

    .full-width {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    #main-header {
        position: sticky;
        top: 0;
        width: 100%;
    }

    .main-nav {
        padding: 8px 15px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 8px;
    }

    .nav-brand {
        font-size: 0.8rem;
        letter-spacing: 1px;
    }

    .nav-menu {
        gap: 8px;
        justify-content: flex-end;
    }

    .nav-menu a {
        font-size: 0.6rem;
        padding: 2px 0;
        letter-spacing: 0.5px;
    }

    section, footer {
        padding: 40px 20px;
        border-left: none;
        border-right: none;
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }

    h1 {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }

    h2 {
        font-size: 1.3rem;
        letter-spacing: 2px;
    }

    h3 {
        font-size: 1.1rem;
        letter-spacing: 2px;
    }
}

@media (max-width: 480px) {
    .main-nav {
        padding: 6px 10px;
        gap: 5px;
    }

    .nav-brand {
        font-size: 0.7rem;
    }

    .nav-menu {
        gap: 6px;
    }

    .nav-menu a {
        font-size: 0.55rem;
    }

    section, footer {
        padding: 30px 15px;
    }

    h1 {
        font-size: 1.3rem;
    }

    h2 {
        font-size: 1.1rem;
    }

    .hero h1 {
        font-size: 1.3rem;
    }
}