:root {
    --primary: #25D366;
    --primary-dark: #128C7E;
    --accent: #E8A317;
    --bg-dark: #075E54;
    --text-main: #333;
    --text-light: #666;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background: #f4f7f6;
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

header {
    background: var(--white);
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-dark);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Hero Section --- */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
    clip-path: ellipse(150% 100% at 50% 0%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 10px 20px rgba(232, 163, 23, 0.3);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(232, 163, 23, 0.4);
}

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

/* --- Features --- */
.features {
    padding: 5rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

/* --- Form Support --- */
.register-box {
    max-width: 500px;
    margin: -100px auto 4rem;
    background: var(--white);
    padding: 3rem;
    border-radius: 30px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.1);
    position: relative;
    z-index: 10;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.form-group input {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid #eee;
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

/* --- Download Section --- */
.download-area {
    text-align: center;
    padding: 2rem;
    background: #e8f5e9;
    border-radius: 20px;
    margin-top: 2rem;
    display: none; /* Shown on success */
}

.download-area h2 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .register-box { margin-top: -50px; padding: 2rem; }
}