/* ===== COMMON STYLES — Grammers ===== */

/* Базовые переменные — Grammers Theme */
:root {
    --bg-dark: #080b10;
    --bg-card: rgba(16, 20, 28, 0.8);
    --bg-card-solid: #10141c;
    --bg-card-hover: #161b26;
    --primary: #0D9373;
    --primary-light: #00D4AA;
    --primary-glow: rgba(0, 212, 170, 0.25);
    --primary-subtle: rgba(0, 212, 170, 0.08);
    --secondary-gold: #00D4AA;
    --secondary-gold-glow: rgba(0, 212, 170, 0.2);
    --text-main: #edf2f7;
    --text-muted: #718096;
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 212, 170, 0.15);
    --success: #10B981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --gradient-brand: linear-gradient(135deg, #00D4AA 0%, #0D9373 100%);
    --glass-bg: rgba(16, 20, 28, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-main); background-color: var(--bg-dark); color: var(--text-main); line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { text-decoration: none; color: inherit; -webkit-transition: var(--transition); transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

/* Кнопки — Safari safe */
.btn-primary, .btn-primary-outline, .btn-secondary {
    display: inline-flex; justify-content: center; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 15px;
    cursor: pointer; -webkit-transition: var(--transition); transition: var(--transition);
    border: none; text-align: center;
    -webkit-appearance: none; -moz-appearance: none; appearance: none;
    -webkit-tap-highlight-color: transparent;
    min-height: 48px; touch-action: manipulation;
}
.btn-primary { background: var(--primary-light); color: #080b10; font-weight: 700; box-shadow: 0 4px 20px var(--primary-glow), inset 0 1px 0 rgba(255,255,255,0.2); }
.btn-primary:hover { -webkit-transform: translateY(-2px); transform: translateY(-2px); box-shadow: 0 8px 30px var(--primary-glow), 0 0 40px rgba(0, 212, 170, 0.15); background: #00e5b8; }
.btn-primary-outline { background-color: transparent; border: 1.5px solid var(--primary-light); color: var(--primary-light); font-weight: 700; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.btn-primary-outline:hover { background-color: var(--primary-light); color: #080b10; box-shadow: 0 4px 20px var(--primary-glow); }
.btn-secondary { background-color: rgba(255, 255, 255, 0.04); color: var(--text-main); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border: 1px solid var(--glass-border); }
.btn-secondary:hover { background-color: rgba(255, 255, 255, 0.08); -webkit-transform: translateY(-2px); transform: translateY(-2px); border-color: rgba(255,255,255,0.15); }
.btn-gold { background: var(--primary-light); color: #080b10; font-weight: 700; box-shadow: 0 4px 14px var(--primary-glow); -webkit-appearance: none; appearance: none; }
.btn-gold:hover { -webkit-transform: translateY(-2px); transform: translateY(-2px); box-shadow: 0 8px 25px var(--primary-glow); }
.w-100 { width: 100%; }
.nav-login-link { color: var(--text-main); text-decoration: none; font-weight: 600; font-size: 15px; transition: var(--transition); padding: 8px 4px; }
.nav-login-link:hover { color: var(--primary-light); }

/* Навигация — Safari safe */
.navbar { position: fixed; top: 0; width: 100%; background-color: rgba(8, 11, 16, 0.75); -webkit-backdrop-filter: blur(20px) saturate(1.2); backdrop-filter: blur(20px) saturate(1.2); border-bottom: 1px solid rgba(255, 255, 255, 0.04); z-index: 1000; -webkit-transition: box-shadow 0.3s ease, background-color 0.3s ease; transition: box-shadow 0.3s ease, background-color 0.3s ease; }
.navbar.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.5); background-color: rgba(8, 11, 16, 0.92); }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 64px; }
.logo { font-size: 22px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: var(--text-main); flex-shrink: 0; display: inline-flex; align-items: center; gap: 10px; }
.logo-icon { flex-shrink: 0; }
.logo-img { height: 38px; width: auto; display: block; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-muted); font-size: 15px; font-weight: 500; position: relative; white-space: nowrap; letter-spacing: 0.2px; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--primary-light); -webkit-transition: var(--transition); transition: var(--transition); border-radius: 1px; box-shadow: 0 0 8px var(--primary-glow); }
.nav-links a:hover { color: var(--text-main); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--text-main); }
.nav-actions { display: flex; align-items: center; gap: 20px; }
.nav-actions .btn-primary-outline { padding: 10px 24px; font-size: 14px; min-height: auto; }

/* Language dropdown */
.lang-dropdown { position: relative; }
.lang-toggle { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08); border-radius: 8px; padding: 7px 12px; color: var(--text-muted); cursor: pointer; font-size: 13px; font-weight: 600; -webkit-transition: var(--transition); transition: var(--transition); -webkit-appearance: none; appearance: none; -webkit-tap-highlight-color: transparent; }
.lang-toggle:hover { background: rgba(255,255,255,0.1); color: var(--text-main); border-color: rgba(255,255,255,0.15); }
.lang-toggle svg { flex-shrink: 0; }
.lang-current { min-width: 18px; text-align: center; }
.lang-chevron { -webkit-transition: transform 0.2s ease; transition: transform 0.2s ease; }
.lang-dropdown.open .lang-chevron { -webkit-transform: rotate(180deg); transform: rotate(180deg); }
.lang-dropdown.open .lang-toggle { background: rgba(255,255,255,0.1); border-color: var(--primary-light); color: var(--text-main); }
.lang-menu { position: absolute; top: calc(100% + 8px); right: 0; min-width: 160px; background: var(--bg-card-solid); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; padding: 6px; opacity: 0; visibility: hidden; -webkit-transform: translateY(-8px) scale(0.96); transform: translateY(-8px) scale(0.96); -webkit-transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1); transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1); box-shadow: 0 12px 40px rgba(0,0,0,0.5); z-index: 1100; }
.lang-dropdown.open .lang-menu { opacity: 1; visibility: visible; -webkit-transform: translateY(0) scale(1); transform: translateY(0) scale(1); }
.lang-option { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 14px; border: none; background: transparent; color: var(--text-muted); font-size: 14px; font-weight: 500; border-radius: 6px; cursor: pointer; -webkit-transition: var(--transition); transition: var(--transition); -webkit-appearance: none; appearance: none; text-align: left; }
.lang-option:hover { background: rgba(255,255,255,0.06); color: var(--text-main); }
.lang-option.active { color: var(--primary-light); background: var(--primary-subtle); }
.lang-flag { font-weight: 700; font-size: 13px; min-width: 24px; text-align: center; padding: 2px 4px; border-radius: 4px; background: rgba(255,255,255,0.06); }

/* Гамбургер-меню (мобильное) — Safari safe */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 10px; z-index: 1100; -webkit-appearance: none; appearance: none; -webkit-tap-highlight-color: transparent; min-width: 44px; min-height: 44px; touch-action: manipulation; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-main); margin: 5px 0; -webkit-transition: var(--transition); transition: var(--transition); border-radius: 2px; }
.hamburger.active span:nth-child(1) { -webkit-transform: rotate(45deg) translate(5px, 5px); transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { -webkit-transform: rotate(-45deg) translate(5px, -5px); transform: rotate(-45deg) translate(5px, -5px); }

.mobile-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 1050; opacity: 0; visibility: hidden; -webkit-transition: var(--transition); transition: var(--transition); }
.mobile-overlay.active { opacity: 1; visibility: visible; }

.mobile-sidebar { position: fixed; top: 0; right: -85vw; width: 80vw; max-width: 300px; height: 100%; background: var(--bg-card); z-index: 1060; -webkit-transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1); transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1); padding: 80px 20px 24px; display: flex; flex-direction: column; gap: 4px; border-left: 1px solid var(--border-color); -webkit-overflow-scrolling: touch; overflow-y: auto; }
.mobile-sidebar.active { right: 0; }
.mobile-sidebar a { display: block; padding: 14px 16px; color: var(--text-main); font-size: 16px; font-weight: 500; border-radius: 8px; -webkit-transition: var(--transition); transition: var(--transition); -webkit-tap-highlight-color: transparent; min-height: 48px; display: flex; align-items: center; }
.mobile-sidebar a:hover, .mobile-sidebar a.active { background: rgba(49, 130, 206, 0.1); color: var(--primary-light); }
.mobile-sidebar .mobile-lang { display: flex; gap: 8px; margin-top: 16px; padding: 14px 16px; }
.mobile-sidebar .mobile-lang button { background: none; border: 1px solid var(--border-color); color: var(--text-muted); font-weight: 600; cursor: pointer; padding: 8px 14px; border-radius: 6px; -webkit-transition: var(--transition); transition: var(--transition); -webkit-appearance: none; appearance: none; min-height: 44px; touch-action: manipulation; font-size: 14px; }
.mobile-sidebar .mobile-lang button.active { color: #fff; background: var(--primary-light); border-color: var(--primary-light); }
.mobile-sidebar .mobile-cta { margin-top: auto; display: flex; flex-direction: column; gap: 12px; padding-bottom: env(safe-area-inset-bottom, 0); }

/* Общие заголовки секций */
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: clamp(24px, 4vw, 36px); font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.section-header p { color: var(--text-muted); font-size: clamp(15px, 2vw, 17px); max-width: 700px; margin: 0 auto; }

/* Подвал */
footer { padding: 48px 0 24px; border-top: 1px solid rgba(255,255,255,0.04); background-color: #060810; }
.footer-container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-info p { color: var(--text-muted); margin-top: 16px; font-size: 14px; max-width: 300px; }
.footer-links h4, .footer-contact h4 { margin-bottom: 16px; font-size: 16px; color: var(--text-main); }
.footer-links a, .footer-contact a, .footer-contact p { display: block; color: var(--text-muted); margin-bottom: 12px; font-size: 14px; -webkit-transition: var(--transition); transition: var(--transition); }
.footer-links a:hover, .footer-contact a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 24px; text-align: center; color: #4a5568; font-size: 14px; }

/* Анимации появления */
.fade-in { opacity: 0; -webkit-transform: translateY(30px); transform: translateY(30px); -webkit-transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), -webkit-transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.fade-in.visible { opacity: 1; -webkit-transform: translateY(0); transform: translateY(0); }

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
    .fade-in { opacity: 1; transform: none; }
}

/* ===== АДАПТИВ ===== */

/* Планшет */
@media (max-width: 1024px) {
    .nav-links { gap: 20px; }
    .nav-links a { font-size: 14px; }
    .nav-actions .btn-primary-outline { display: none; }
    .footer-container { gap: 24px; }
}

/* Мобильный — навигация */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-actions .btn-primary-outline,
    .nav-actions .btn-primary { display: none; }
    .hamburger { display: flex; align-items: center; justify-content: center; }
    .nav-container { height: 56px; }
    .container { padding: 0 16px; }
    .footer-container { grid-template-columns: 1fr; gap: 32px; }
    footer { padding: 32px 0 16px; }
    .section-header { margin-bottom: 32px; }
}

/* Малые мобилки */
@media (max-width: 480px) {
    .container { padding: 0 12px; }
    .section-header h2 { font-size: clamp(20px, 5vw, 28px); }
    .btn-primary, .btn-primary-outline, .btn-secondary { padding: 12px 20px; font-size: 14px; width: 100%; }
}

@media (max-width: 360px) {
    .container { padding: 0 10px; }
}