:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --bg-color: #ffffff;
    --section-bg: #f9fafb;
    --container-width: 1100px;
}

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

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

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

/* Header & Navigation */
header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #e5e7eb;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: color 0.3s;
}

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

.lang-switch a {
    background: #f3f4f6;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Hero Section */
.hero {
    padding: 100px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}

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

.hero p {
    font-size: 1.25rem;
    color: var(--light-text);
    max-width: 700px;
    margin: 0 auto 40px;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background-color: var(--secondary-color);
}

/* Apps Section */
.apps {
    padding: 80px 20px;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
}

.app-card {
    background: var(--section-bg);
    border-radius: 20px;
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    border: 1px solid #e5e7eb;
}

.app-info h3 {
    font-size: 1.75rem;
    margin-bottom: 15px;
}

.app-info p {
    color: var(--light-text);
    margin-bottom: 25px;
}

.app-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.badge {
    background: #dbeafe;
    color: var(--primary-color);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.placeholder-img {
    background: #e5e7eb;
    height: 300px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    font-weight: 600;
}

/* About & Contact */
.about, .contact {
    padding: 60px 20px;
    text-align: center;
}

.about p {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
}

.contact-details {
    margin-top: 20px;
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* Footer */
footer {
    padding: 40px 0;
    border-top: 1px solid #e5e7eb;
    margin-top: 60px;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--light-text);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .app-card { grid-template-columns: 1fr; }
    footer .container { flex-direction: column; gap: 20px; text-align: center; }
}