:root {
    --bg-dark: #07090f;
    --bg-card: rgba(26, 35, 50, 0.6);
    --bg-card-hover: rgba(30, 42, 60, 0.8);
    --border-glass: rgba(255, 255, 255, 0.08);
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent-blue: #2D5AA0;
    --accent-blue-hover: #4A7CC9;
    --accent-orange: #E65100;
    --accent-orange-hover: #FF7043;
    
    --success: #10b981;
    --font-stack: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-stack);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    /* Soft grid background for technical feel */
    background-image: 
        linear-gradient(rgba(45, 90, 160, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(45, 90, 160, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
}

/* Typography */
h1, h2, h3 { font-weight: 700; letter-spacing: -0.5px; }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.1; margin-bottom: 1.5rem; }
h2 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 1.5rem; }
p { color: var(--text-muted); font-size: 1.1rem; }

.text-gradient-blue {
    background: linear-gradient(135deg, #60a5fa, #2D5AA0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.text-gradient-orange {
    background: linear-gradient(135deg, #FF7043, #E65100);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Nav */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(7, 9, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.logo i { color: var(--accent-orange); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--accent-orange);
    color: white;
    box-shadow: 0 4px 15px rgba(230, 81, 0, 0.3);
}
.btn-primary:hover {
    background: var(--accent-orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 81, 0, 0.4);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Sections */
section { padding: 6rem 0; }

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}
.hero-content {
    max-width: 650px;
    position: relative;
    z-index: 2;
}

/* Grid Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    transition: transform 0.3s;
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(45, 90, 160, 0.5); }
.feature-icon {
    width: 50px; height: 50px;
    background: rgba(45, 90, 160, 0.2);
    color: #60a5fa;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.5rem;
}

/* Pricing Card */
.pricing-card {
    background: linear-gradient(145deg, var(--bg-card), rgba(7, 9, 15, 0.9));
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}
.pricing-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-orange));
}

/* Forms (Checkout) */
.checkout-wrapper {
    display: flex;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: 4rem 5%;
}
.checkout-box {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    max-width: 600px;
    backdrop-filter: blur(12px);
}
.form-group { margin-bottom: 1.5rem; }
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-muted);
}
.form-control {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    color: white;
    padding: 1rem;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s;
}
.form-control:focus { outline: none; border-color: var(--accent-orange); }

.type-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}
.type-btn {
    flex: 1;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}
.type-btn.active {
    background: rgba(45, 90, 160, 0.2);
    border-color: var(--accent-blue);
    color: white;
}

.device-id-badge {
    background: rgba(230, 81, 0, 0.1);
    border: 1px solid rgba(230, 81, 0, 0.3);
    color: #FF7043;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: monospace;
    font-size: 1.1rem;
    text-align: center;
    letter-spacing: 2px;
    margin-bottom: 2rem;
}