/* --- Глобальные настройки и переменные --- */
:root {
    --bg-color: #0b0b0e;
    --card-bg: #1a1a1f;
    --text-color: #e0e0e0;
    --text-muted: #888;
    --primary-cyan: #38c8d1;
    --primary-blue: #5b79f2;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- Контейнер и секции --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 20px;
    text-align: center;
}

h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 20px;
}

h2 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, var(--primary-cyan), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

/* --- Главный экран (Hero) --- */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('img/desktop_bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* Эффект параллакса */
}

#hero h1 {
    font-size: 5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary-cyan), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

#hero .subtitle {
    font-size: 1.5rem;
    color: #ccc;
    margin-top: 10px;
    margin-bottom: 30px;
}

/* --- Кнопки --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin: 5px;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-cyan);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--primary-cyan);
    color: var(--primary-cyan);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(56, 200, 209, 0.2);
}

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

.btn-secondary:hover {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    color: #fff;
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.2rem;
    margin-top: 30px;
}

/* --- Секция "Преимущества" --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 40px 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature-card h3 {
    color: #fff;
    font-size: 1.5rem;
}

/* --- Секция "Галерея" --- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 50px;
}

.gallery-item img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.gallery-item img:hover {
    transform: scale(1.05);
}

.gallery-item p {
    margin-top: 15px;
    font-size: 1rem;
    color: #ccc;
}

/* --- Секция "Скачать" и подвал --- */
#download .disclaimer {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

footer {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

/* --- Адаптивность для мобильных устройств --- */
@media (max-width: 768px) {
    #hero h1 {
        font-size: 3.5rem;
    }
    h2 {
        font-size: 2rem;
    }
}