/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-light);
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

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

.logo {
    font-weight: 800;
    font-size: 1.2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    gap: 24px;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
}

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

.lang-btn {
    padding: 6px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Hero */
.hero {
    margin-top: var(--header-height);
    padding: 100px 0;
    text-align: center;
    background: radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1f2937 0%, #4b5563 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--text-sub);
    margin-bottom: 40px;
}

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

.btn {
    padding: 12px 32px;
    border-radius: 99px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--text-main);
    border: 1px solid #e5e7eb;
}

/* Features */
.features {
    padding: 80px 0;
    background: white;
}

.features h2 {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 32px;
    border-radius: 20px;
    background: var(--bg-light);
    text-align: center;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card .icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.feature-card p {
    color: var(--text-sub);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-sub);
    font-size: 0.9rem;
    border-top: 1px solid #e5e7eb;
}