:root {
    --bg: #0f1419;
    --bg-alt: #161c24;
    --text: #e8edf2;
    --text-muted: #9aa8b5;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --red: #ef4444;
    --border: #243041;
    --card: #1a222d;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 20, 25, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 32px;
}

/* Logo */
.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.logo-mark {
    color: var(--red);
}

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

/* Navigation */
nav {
    display: flex;
    gap: 28px;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.925rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--text);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 4px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 3px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.lang-btn.active {
    background: var(--accent);
    color: white;
}

.lang-btn:hover:not(.active) {
    color: var(--text);
}

/* Hero */
.hero {
    padding: 150px 0 90px;
}

.hero h1 {
    font-size: clamp(2.4rem, 5.2vw, 3.3rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.035em;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 460px;
    line-height: 1.6;
    margin-bottom: 36px;
}

/* Button */
.btn {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 12px 26px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease;
    font-family: inherit;
}

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

/* Sections */
.section {
    padding: 90px 0;
}

.section-alt {
    background: var(--bg-alt);
}

h2 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 40px;
}

/* Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 26px 24px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
    border-color: #334155;
    transform: translateY(-2px);
}

.card-icon {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.08rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.015em;
}

.card p {
    color: var(--text-muted);
    font-size: 0.94rem;
    line-height: 1.6;
}

/* About */
.about {
    display: grid;
    grid-template-columns: 1.45fr 1fr;
    gap: 60px;
    align-items: center;
}

.about p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 1.02rem;
}

.stats {
    display: grid;
    gap: 28px;
}

.stat-num {
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 60px;
}

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

.contact-form input,
.contact-form textarea {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 13px 16px;
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text);
}

/* Mobile */
@media (max-width: 768px) {
    nav {
        display: none;
    }

    .header-right {
        gap: 16px;
    }

    .about,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero {
        padding: 120px 0 70px;
    }

    .hero h1 {
        font-size: 2.3rem;
    }

    h2 {
        margin-bottom: 32px;
    }
}