:root {
    --primary: #0a192f;
    --accent: #64ffda;
    --accent-dark: #00d2ff;
    --text-main: #ccd6f6;
    --text-dim: #8892b0;
    --white: #ffffff;
    --bg-light: #112240;
    --transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--primary);
    overflow-x: hidden;
}

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

.container.narrow {
    max-width: 800px;
}

.section-padding {
    padding: 100px 0;
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--white);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2.section-title { 
    font-size: 2.5rem; 
    text-align: center;
    margin-bottom: 3rem;
}

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

.lead {
    font-size: 1.25rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 2rem;
}

/* Header */
header {
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--white);
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Buttons */
.btn-primary {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: var(--transition);
}

.btn-primary:hover {
    background: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

.btn-secondary {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 1.5rem;
    border-bottom: 1px solid var(--accent);
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at top right, #112240, #0a192f);
}

.badge {
    color: var(--accent);
    font-family: monospace;
    display: block;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-dim);
    max-width: 700px;
    margin-bottom: 2.5rem;
}

/* Grid & Cards */
.feature-grid, .problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
}

.card-icon {
    font-family: monospace;
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.alt {
    background-color: #0f172a;
}

/* Problem Items */
.problem-item {
    padding: 1.5rem;
    border-left: 3px solid var(--accent);
    background: rgba(100, 255, 218, 0.05);
}

/* Vision */
.vision-section {
    padding: 150px 0;
    text-align: center;
    background: linear-gradient(rgba(10, 25, 47, 0.9), rgba(10, 25, 47, 0.9)), 
                url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-attachment: fixed;
}

.vision-text {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(to right, #64ffda, #00d2ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Forms */
.glass-form {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.form-row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

input, select {
    background: #1d2d50;
    border: 1px solid #233554;
    padding: 0.8rem;
    color: white;
    border-radius: 4px;
}

.full-width { width: 100%; cursor: pointer; margin-top: 1rem;}

/* Footer */
footer {
    padding: 80px 0 30px;
    border-top: 1px solid #233554;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 3rem;
    margin-bottom: 50px;
}

footer strong { color: var(--white); display: block; margin-bottom: 1.2rem;}
footer ul { list-style: none; }
footer ul li { margin-bottom: 0.8rem; color: var(--text-dim); font-size: 0.9rem;}

.input-group {
    display: flex;
    margin-top: 1rem;
}

.input-group input { border-radius: 4px 0 0 4px; flex: 1; }
.btn-sm { 
    background: var(--accent); 
    border: none; 
    padding: 0 1rem; 
    border-radius: 0 4px 4px 0;
    font-weight: 600;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid #233554;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner { flex-direction: column; gap: 1rem; }
    nav ul { gap: 1rem; font-size: 0.7rem; }
    .form-row { flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .vision-text { font-size: 2rem; }
}