:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --accent: #e67e22;
    --bg: #0f172a;
    --card-bg: #1e293b;
    --card-border: #334155;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #2ecc71;
    --error: #e74c3c;
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

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

/* Typography */
h2 { font-size: 2.5rem; font-weight: 800; letter-spacing: -1px; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
h4 { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.5rem; }

.section-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(52, 152, 219, 0.15);
    color: var(--primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

/* Header */
header {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -1px;
    cursor: pointer;
}

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

.header-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.demo-hint {
    font-size: 13px;
    color: var(--text-muted);
}

.demo-hint strong { color: var(--primary); }

/* Hero */
.hero {
    padding: 8rem 0 6rem;
    text-align: center;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    line-height: 1.1;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.4rem;
    color: var(--text-muted);
    max-width: 750px;
    margin: 0 auto 3rem;
}

.hero-password {
    margin-top: 1.5rem;
    font-size: 14px;
    color: var(--text-muted);
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    padding: 0.85rem 2.25rem;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 20px -10px var(--primary); }

.btn-outline { border: 2px solid var(--border); color: white; background: transparent; }
.btn-outline:hover { background: var(--border); transform: translateY(-2px); }

/* Problem Section */
.problem-section {
    padding: 6rem 0;
    background: rgba(255,255,255,0.02);
    text-align: center;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.problem-card {
    background: var(--card-bg);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    text-align: left;
    transition: transform 0.3s ease;
}

.problem-card:hover { transform: translateY(-5px); border-color: var(--primary); }

.problem-icon {
    font-size: 2rem;
    margin-bottom: 1.25rem;
}

.problem-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* Pillars */
.pillars-section {
    padding: 8rem 0;
    text-align: center;
}

.pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.pillar-card {
    background: var(--bg);
    padding: 3rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.pillar-number {
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 6rem;
    font-weight: 900;
    color: rgba(255,255,255,0.03);
    pointer-events: none;
}

.pillar-card h3 { color: var(--primary); font-size: 1.1rem; letter-spacing: 1px; }
.pillar-card p { color: var(--text-muted); margin: 0; }

/* Estimator */
.estimator-section {
    padding: 8rem 0;
    background: #020617;
}

.section-intro {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 4rem;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.inputs {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.service-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.service-item:hover { border-color: var(--primary); background: rgba(52, 152, 219, 0.05); }
.service-item input[type=\"checkbox\"] { width: 20px; height: 20px; cursor: pointer; }
.service-item label { cursor: pointer; flex: 1; font-weight: 500; }
.service-item.special { border-style: dashed; }

.price-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    position: sticky;
    top: 120px;
}

.price-header {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.price-row { display: flex; justify-content: space-between; margin-bottom: 1rem; color: var(--text-muted); }
.price-row span:last-child { color: var(--text); font-weight: 600; }

.total-row {
    border-top: 1px solid var(--border);
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    font-weight: 800;
    font-size: 1.5rem;
    color: white !important;
}

.price-disclaimer {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2rem;
    font-style: italic;
}

/* Signup */
.signup-section {
    padding: 8rem 0;
    text-align: center;
}

.signup-form {
    max-width: 550px;
    margin: 4rem auto 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
}

.signup-form input {
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: white;
    font-size: 1rem;
}

.signup-form input:focus { outline: 2px solid var(--primary); border-color: transparent; }

/* Footer */
footer {
    padding: 6rem 0 4rem;
    background: #020617;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover { color: var(--primary); }

/* Responsive */
@media (max-width: 1024px) {
    .calc-grid { grid-template-columns: 1fr; gap: 3rem; }
    .price-card { position: static; }
}

@media (max-width: 768px) {
    .pillars { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.75rem; }
    .header-right { display: none; }
    .hero { padding: 5rem 0; }
}