:root {
    /* --- СВЕТЛАЯ ТЕМА (оставлена для возможного переключателя) --- */
    --bg-body: #f8fafc;
    --bg-nav: rgba(255, 255, 255, 0.9);
    --bg-card: #ffffff;
    --bg-section-alt: #f1f5f9;
    
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    --accent: #ef4444;          /* основной красный */
    --accent-hover: #dc2626;
    
    --secondary: #f97316;       /* оранжевый для второй кнопки */
    --secondary-hover: #ea580c;
    
    --free-green: #22c55e;      /* зелёный для "бесплатный тест" */
    --free-green-hover: #55e98b;
    
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    
    --radius: 12px;
    --nav-height: 70px;
}

/* --- ТЕМНАЯ ТЕМА (основная для твоего сайта сейчас) --- */
[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-nav: rgba(15, 23, 42, 0.92);
    --bg-card: #1e293b;
    --bg-section-alt: #162032;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent: #ef4444;
    --accent-hover: #dc2626;
    
    --secondary: #f97316;
    --secondary-hover: #ea580c;
    
    --free-green: #22c55e;
    
    --border: #334155;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Geologica', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- НАВИГАЦИЯ --- */
nav {
    background: var(--bg-nav);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background 0.3s, border-color 0.3s;
}

nav .container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

.nav-right { display: flex; align-items: center; gap: 20px; }

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent); }

.btn-acc {
    background: var(--accent);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.2s;
}
.btn-acc:hover { background: var(--accent-hover); }

/* Кнопка темы */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    display: flex;
    align-items: center;
    transition: transform 0.2s;
}
.theme-toggle:hover { transform: rotate(15deg); color: var(--accent); }

/* --- HERO СЕКЦИЯ --- */
.hero {
    position: relative;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.78), rgba(239, 68, 68, 0.25)),
                url('hero-main.jpg');
    background-size: cover;
    background-position: center;
    min-height: 650px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
    padding-top: var(--nav-height);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(90deg, #ef4444, #f97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: var(--radius);
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary { 
    background: var(--accent); 
    color: #fff; 
    border: 2px solid var(--accent); 
}
.btn-primary:hover { 
    background: var(--accent-hover); 
    transform: translateY(-3px); 
    box-shadow: 0 10px 20px rgba(239, 68, 68, 0.35); 
}

.btn-secondary { 
    background: var(--secondary); 
    color: #fff; 
    border: 2px solid var(--secondary); 
}
.btn-secondary:hover { 
    background: var(--secondary-hover); 
    transform: translateY(-3px); 
    box-shadow: 0 10px 20px rgba(249, 115, 22, 0.35); 
}

.btn-outline-white { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3); }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* --- СЕКЦИИ --- */
section { padding: 100px 0; border-bottom: 1px solid var(--border); }
section.bg-alt { background-color: var(--bg-section-alt); }

.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { 
    font-size: 2.5rem; 
    font-weight: 800; 
    margin-bottom: 16px; 
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-title p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* --- ТАРИФЫ --- */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.plan-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 24px;
    text-align: center;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.plan-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.plan-card.featured {
    border: 2px solid var(--accent);
    transform: scale(1.02);
    z-index: 2;
}

[data-theme="dark"] .plan-card.featured { background: rgba(239, 68, 68, 0.08); }

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
}

.plan-name { font-size: 1.2rem; font-weight: 700; margin-bottom: 15px; }
.plan-price { font-size: 2rem; font-weight: 800; color: var(--secondary); margin-bottom: 24px; }
.plan-price span { font-size: 0.9rem; font-weight: 500; color: var(--text-muted); }

.plan-specs {
    margin-bottom: 24px;
    text-align: left;
    font-size: 0.95rem;
    color: var(--text-muted);
}
.plan-specs div { margin-bottom: 10px; display: flex; justify-content: space-between; border-bottom: 1px dashed var(--border); padding-bottom: 4px;}
.plan-specs b { color: var(--text-main); }

.btn-plan {
    width: 100%;
    display: block;
    padding: 12px 0;
    border: 1px solid var(--free-green);
    color: var(--free-green-hover);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: 0.2s;
}
.btn-plan:hover { background: var(--free-green); color: #fff; }

/* --- ПРЕИМУЩЕСТВА --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-item {
    background: var(--bg-card);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.feature-item:hover { transform: translateY(-5px); border-color: var(--accent); }

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--accent);
}

.feature-item h3 { margin-bottom: 10px; font-weight: 700; }
.feature-item p { color: var(--text-muted); font-size: 0.95rem; }

/* --- ПОДДЕРЖКА --- */
.support-box {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-section-alt) 100%);
    padding: 60px 20px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--border);
    max-width: 900px;
    margin: 0 auto;
}

.support-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}
.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 16px 32px;
    font-weight: 700;
    border-radius: var(--radius);
    text-decoration: none;
    transition: 0.2s;
}
.btn-secondary:hover { 
    border-color: var(--secondary); 
    color: var(--secondary); 
    background: var(--bg-card); 
}

/* --- FOOTER --- */
footer {
    background: var(--bg-card);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* --- АНИМАЦИИ --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- МОБИЛЬНЫЙ АДАПТИВ --- */
@media (max-width: 800px) {
    .nav-links { display: none; }
    .hero-content h1 { font-size: 2.5rem; }
    .plans-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
    .hero-btns, .support-actions { flex-direction: column; }
    .btn-lg, .btn-secondary { width: 100%; text-align: center; }
}
/* --- АВТОРИЗАЦИЯ (Войти / Регистрация) --- */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-auth {
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-login {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}

.btn-login:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-1px);
}

.btn-register {
    background: var(--secondary);           /* оранжевый, как "Посмотреть тарифы" */
    color: #fff;
    border: 1px solid var(--secondary);
    box-shadow: 0 2px 8px rgba(249, 115, 22, 0.2);
}

.btn-register:hover {
    background: var(--secondary-hover);
    border-color: var(--secondary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.35);
}

/* Мобильная адаптация */
@media (max-width: 800px) {
    .auth-buttons {
        gap: 10px;
    }
    
    .btn-auth {
        padding: 7px 14px;
        font-size: 0.85rem;
    }
    
    /* Если места совсем мало — можно сделать кнопки ещё компактнее */
    /* .btn-auth { padding: 6px 12px; font-size: 0.8rem; } */
}

.btn-plan {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;          /* расстояние между иконкой и текстом */
    padding: 12px 0;   /* оставляем как было */
}

.btn-plan i {
    font-size: 1.1rem; /* чуть больше текста, можно 1em */
}

.faq-section {
    padding: 100px 0;
    background: var(--bg-section-alt);
}

.faq-intro {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 60px;
    font-size: 1.1rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.faq-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all 0.3s;
}

.faq-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.faq-icon {
    width: 32px;
    height: 32px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: bold;
}

.faq-answer {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
}