/* --- Premium Typography & Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Color Palette */
    --bg-deep: #020617;           /* Deepest Space */
    --card-bg: #0f172a;           /* Slate Blue */
    --accent: #3b82f6;            /* Electric Blue */
    --accent-glow: rgba(59, 130, 246, 0.4);
    --text-primary: #ffffff;
    --text-muted: #94a3b8;
    --success: #10b981;
    --border: rgba(255, 255, 255, 0.08);
    
    /* Animation Speeds */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* --- Million-Dollar Glass Navigation --- */
.glass-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 10%;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    color: #fff;
    letter-spacing: -1px;
}

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

.logo-icon {
    color: var(--accent);
    filter: drop-shadow(0 0 10px var(--accent-glow));
}

.nav-links .nav-item {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    margin: 0 15px;
    transition: var(--transition);
}

.nav-links .nav-item:hover {
    color: #fff;
}

/* --- Layout Containers --- */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 100px auto;
    text-align: center;
}

/* --- Hero Typography --- */
h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.6) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p.subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.5);
    filter: brightness(1.1);
}

.btn-ghost {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    margin-right: 20px;
    transition: var(--transition);
}

.btn-nav {
    background: var(--accent);
    color: white;
    padding: 10px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition);
}

/* --- Device Selector (Dashboard Style) --- */
.dev-selector {
    display: inline-flex;
    background: #1e293b;
    padding: 6px;
    border-radius: 50px;
    gap: 5px;
    margin-bottom: 50px;
    border: 1px solid var(--border);
}

.dev-btn {
    color: var(--text-muted);
    padding: 10px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.dev-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* --- Pricing Cards --- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.card {
    background: var(--card-bg);
    padding: 48px 32px;
    border-radius: 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-align: left;
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.5), 0 0 20px var(--accent-glow);
}

.popular {
    position: absolute;
    top: 25px;
    right: -35px;
    background: var(--accent);
    color: white;
    padding: 6px 40px;
    transform: rotate(45deg);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 20px 0;
    letter-spacing: -2px;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 0;
}

ul.features {
    list-style: none;
    margin-bottom: 30px;
}

ul.features li {
    margin-bottom: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

/* --- Input Fields (Login/Checkout) --- */
input {
    width: 100%;
    padding: 14px;
    background: #020617;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: white;
    margin-bottom: 20px;
    font-family: inherit;
    transition: var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

/* --- Responsive Layout --- */
@media (max-width: 768px) {
    .glass-nav { padding: 1rem 5%; }
    .nav-links, .btn-ghost { display: none; }
    h1 { font-size: 2.8rem; }
    .container { margin: 60px auto; }
}