/* Copper State AI — Landing Page */

:root {
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a26;
    --copper: #c87533;
    --copper-light: #e8a460;
    --copper-glow: rgba(200, 117, 51, 0.15);
    --text: #e4e4e8;
    --text-muted: #8888a0;
    --text-dim: #555568;
    --border: #1e1e2e;
    --white: #ffffff;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.02em;
}

.logo-icon {
    color: var(--copper);
    margin-right: 4px;
}

.nav-tagline {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* Hero */

.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, var(--copper-glow) 0%, transparent 60%);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--white);
    margin-bottom: 24px;
}

.highlight {
    color: var(--copper-light);
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    padding: 8px 20px;
    border: 1px solid var(--copper);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--copper-light);
    background: rgba(200, 117, 51, 0.08);
}

/* Sections */

section {
    padding: 100px 0;
}

section h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--white);
    margin-bottom: 16px;
    text-align: center;
}

.section-sub {
    text-align: center;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 48px;
    font-size: 1.05rem;
}

/* Problem Section */

.problem {
    border-top: 1px solid var(--border);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.problem-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.problem-icon {
    font-size: 1.4rem;
    margin-bottom: 12px;
    opacity: 0.6;
}

.problem-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.problem-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Solution Section */

.solution {
    border-top: 1px solid var(--border);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: border-color 0.2s, background 0.2s;
}

.solution-card:hover {
    border-color: var(--copper);
    background: var(--bg-card-hover);
}

.solution-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--copper);
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.solution-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.solution-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* Verticals */

.verticals {
    border-top: 1px solid var(--border);
}

.vertical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.vertical-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: border-color 0.2s;
}

.vertical-card:hover {
    border-color: var(--copper);
}

.vertical-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--copper-light);
    margin-bottom: 8px;
}

.vertical-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* How It Works */

.how-it-works {
    border-top: 1px solid var(--border);
}

.steps {
    max-width: 640px;
    margin: 48px auto 0;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}

.step:last-child {
    border-bottom: none;
}

.step-num {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(200, 117, 51, 0.12);
    border: 1px solid var(--copper);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--copper-light);
}

.step-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.step-content p {
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* Comparison Table */

.differentiators {
    border-top: 1px solid var(--border);
}

.diff-table-wrap {
    margin-top: 48px;
    overflow-x: auto;
}

.diff-table {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.diff-table th,
.diff-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.diff-table thead th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.diff-table thead th.us {
    color: var(--copper-light);
}

.diff-table td:first-child {
    font-weight: 500;
    color: var(--white);
}

.diff-table td {
    color: var(--text-muted);
}

.diff-table td.us {
    color: var(--copper-light);
    font-weight: 500;
}

/* Footer */

footer {
    border-top: 1px solid var(--border);
    padding: 48px 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-align: right;
    line-height: 1.5;
}

/* Mobile */

@media (max-width: 640px) {
    .nav-tagline {
        display: none;
    }

    .hero {
        padding: 120px 0 80px;
    }

    section {
        padding: 72px 0;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-text {
        text-align: center;
    }

    .step {
        flex-direction: column;
        gap: 12px;
    }
}