/* --- Easy-ITIN Premium Design System --- */
:root {
    --primary: #0a84ff;
    --primary-hover: #0070e3;
    --secondary: #5e5ce6;
    --bg-dark: #000000;
    --bg-card: rgba(28, 28, 30, 0.7);
    --text-main: #ffffff;
    --text-muted: #8e8e93;
    --accent: #64d2ff;
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient: linear-gradient(135deg, #0a84ff 0%, #5e5ce6 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* --- Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
}

/* --- Header --- */
header {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    background: rgba(0,0,0,0.5);
    border-bottom: 1px solid var(--glass-border);
    padding: 0 40px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--text-main);
}

/* --- Hero Section --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-image: url('assets/img/hero.png');
    background-size: cover;
    background-position: center;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.9) 20%, rgba(0,0,0,0.4) 100%);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero h1 {
    font-size: 64px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 540px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 8px 30px rgba(10, 132, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(10, 132, 255, 0.5);
}

/* --- Cards & Components --- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 32px;
    transition: transform 0.3s;
}

.glass-card:hover {
    transform: translateY(-10px);
}

.section-title {
    text-align: center;
    font-size: 40px;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 60px;
}

/* --- FAQ --- */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.faq-item {
    cursor: pointer;
}

.faq-question {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--accent);
}

/* --- Form --- */
.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.input-group input {
    width: 100%;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px;
    color: white;
    outline: none;
    transition: border-color 0.3s;
}

.input-group input:focus {
    border-color: var(--primary);
}

/* --- Footer --- */
footer {
    padding: 60px 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* --- Responsive --- */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero h1 { font-size: 48px; }
    .hero p { margin: 0 auto 40px; }
    nav { display: none; }
}