/* ═══════════════════════════════════════════════════════════════════════════
   Stomata Landing Page — Design System
   ═══════════════════════════════════════════════════════════════════════════ */

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

:root {
    --bg-primary: #060a13;
    --bg-elevated: rgba(15, 23, 42, 0.6);
    --border-subtle: rgba(56, 189, 248, 0.1);
    --border-hover: rgba(56, 189, 248, 0.3);
    --accent-cyan: #38bdf8;
    --accent-green: #34d399;
    --accent-amber: #f59e0b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --radius-lg: 20px;
    --radius-md: 12px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Background layers ─────────────────────────────────────────────────── */

.bg-mesh {
    position: fixed;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(52, 211, 153, 0.05), transparent),
        radial-gradient(ellipse 50% 30% at 10% 60%, rgba(245, 158, 11, 0.04), transparent);
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(rgba(56, 189, 248, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.025) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 100%);
}

/* ── Page container ────────────────────────────────────────────────────── */

.page-container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
    text-align: center;
    padding: 4rem 0 3rem;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--text-secondary);
}

.hero-title {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.035em;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto;
}

/* ── Pathway cards ─────────────────────────────────────────────────────── */

.pathways {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    width: 100%;
    max-width: 960px;
    margin-top: 1rem;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

@media (max-width: 768px) {
    .pathways {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.pathway-card {
    position: relative;
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition:
        border-color var(--transition-smooth),
        transform var(--transition-smooth),
        box-shadow var(--transition-smooth);
    cursor: pointer;
}

.pathway-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 24px 80px -12px rgba(0, 0, 0, 0.5);
}

#card-arr:hover {
    border-color: rgba(52, 211, 153, 0.35);
    box-shadow: 0 24px 80px -12px rgba(52, 211, 153, 0.1);
}

#card-biochar:hover {
    border-color: rgba(245, 158, 11, 0.35);
    box-shadow: 0 24px 80px -12px rgba(245, 158, 11, 0.1);
}

.card-glow {
    position: absolute;
    top: -60%;
    left: 50%;
    transform: translateX(-50%);
    width: 200%;
    height: 200%;
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-smooth);
    pointer-events: none;
}

.card-glow--arr {
    background: radial-gradient(ellipse, rgba(52, 211, 153, 0.06) 0%, transparent 60%);
}

.card-glow--biochar {
    background: radial-gradient(ellipse, rgba(245, 158, 11, 0.06) 0%, transparent 60%);
}

.pathway-card:hover .card-glow {
    opacity: 1;
}

.card-content {
    position: relative;
    z-index: 1;
    padding: 2.25rem 2rem 2rem;
}

.card-icon {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.card-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: 999px;
    background: rgba(52, 211, 153, 0.12);
    color: var(--accent-green);
    border: 1px solid rgba(52, 211, 153, 0.2);
    margin-bottom: 1rem;
}

.card-badge--amber {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent-amber);
    border-color: rgba(245, 158, 11, 0.2);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.card-description {
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.card-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 1rem;
    margin-bottom: 2rem;
}

.card-features li {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding-left: 1.1rem;
    position: relative;
}

.card-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent-green);
    opacity: 0.7;
}

#card-biochar .card-features li::before {
    background: var(--accent-amber);
}

.card-cta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-green);
    transition: gap var(--transition-fast);
}

.card-cta--amber {
    color: var(--accent-amber);
}

.pathway-card:hover .card-cta {
    gap: 0.85rem;
}

/* ── Footer ────────────────────────────────────────────────────────────── */

.footer {
    margin-top: auto;
    padding: 3rem 0 1rem;
    text-align: center;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}