:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --text: #1e293b;
    --bg: #f8fafc;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background-color: var(--bg);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Hero */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 20px 0 80px;
    border-bottom: 1px solid #bfdbfe;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 80px;
}

.logo {
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-selector select {
    padding: 8px 12px;
    border: 1px solid #bfdbfe;
    border-radius: 6px;
    background-color: white;
    font-family: inherit;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
}

.lang-selector select:hover {
    border-color: var(--primary);
}

.btn-nav {
    background-color: var(--primary);
    color: white !important;
    padding: 8px 16px;
    border-radius: 6px;
    transition: background 0.3s;
}

.btn-nav:hover {
    background-color: var(--primary-dark);
}

.hero-content {
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--primary);
}

.hero-content p {
    font-size: 1.2rem;
    color: #475569;
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.4);
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background-color: var(--primary-dark);
}

.small-note {
    font-size: 0.9rem;
    color: #94a3b8;
    margin-top: 10px;
}

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

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

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

.card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-align: left;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary);
}

/* Download */
.download-section {
    background-color: #1e293b;
    color: white;
    text-align: center;
    padding: 80px 0;
}

.download-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.btn-large {
    display: inline-block;
    background-color: white;
    color: #1e293b;
    font-size: 1.5rem;
    font-weight: 900;
    padding: 20px 50px;
    border-radius: 12px;
    text-decoration: none;
    margin-top: 30px;
    border: 4px solid #cbd5e1;
    transition: all 0.3s;
}

.btn-large:hover {
    background-color: #e2e8f0;
    border-color: white;
}

.disclaimer {
    color: #94a3b8;
    margin-top: 20px;
    font-size: 0.9rem;
}

footer {
    text-align: center;
    padding: 40px 0;
    color: #64748b;
}

footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: bold;
}