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

:root {
    --bg:           #0b0b12;
    --surface:      #111119;
    --surface-2:    #17171f;
    --border:       #1e1e2c;
    --border-hover: #2a2a3c;

    --text:         #b8b8cc;
    --text-muted:   #606075;
    --text-heading: #eeeef8;

    --tsunami:      #00b4d8;
    --volcano:      #ff6030;
    --earthquake:   #a0a0b8;
    --landslide:    #b08060;
    --flood:        #4096ff;
    --drought:      #e8a820;

    --radius:       8px;
    --transition:   0.18s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* ---------- Header ---------- */

.site-header {
    padding: 4.5rem 0 3.5rem;
    border-bottom: 1px solid var(--border);
}

.header-kicker {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.site-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.site-subtitle {
    max-width: 600px;
    font-size: 0.975rem;
    color: var(--text-muted);
    line-height: 1.75;
}

/* ---------- Section label ---------- */

.section-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 3rem;
    margin-bottom: 1.25rem;
}

/* ---------- Grid ---------- */

.sim-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding-bottom: 4rem;
}

/* ---------- Card ---------- */

.sim-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

/* top accent bar */
.sim-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    opacity: 0.8;
    transition: opacity var(--transition);
}

.sim-card--tsunami::before    { background: var(--tsunami); }
.sim-card--volcano::before    { background: var(--volcano); }
.sim-card--earthquake::before { background: var(--earthquake); }
.sim-card--landslide::before  { background: var(--landslide); }
.sim-card--flood::before      { background: var(--flood); }
.sim-card--drought::before    { background: var(--drought); }

/* hover state */
.sim-card:hover {
    background: var(--surface-2);
    transform: translateY(-3px);
}

.sim-card--tsunami:hover    { border-color: var(--tsunami); }
.sim-card--volcano:hover    { border-color: var(--volcano); }
.sim-card--earthquake:hover { border-color: var(--earthquake); }
.sim-card--landslide:hover  { border-color: var(--landslide); }
.sim-card--flood:hover      { border-color: var(--flood); }
.sim-card--drought:hover    { border-color: var(--drought); }

.sim-card:hover::before {
    opacity: 1;
}

/* card internals */
.sim-card__top {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.sim-card__tag {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.sim-card--tsunami    .sim-card__tag { color: var(--tsunami); }
.sim-card--volcano    .sim-card__tag { color: var(--volcano); }
.sim-card--earthquake .sim-card__tag { color: var(--earthquake); }
.sim-card--landslide  .sim-card__tag { color: var(--landslide); }
.sim-card--flood      .sim-card__tag { color: var(--flood); }
.sim-card--drought    .sim-card__tag { color: var(--drought); }

.sim-card__title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.015em;
}

.sim-card__desc {
    font-size: 0.855rem;
    color: var(--text-muted);
    line-height: 1.7;
    flex: 1;
}

.sim-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.85rem;
    margin-top: auto;
    border-top: 1px solid var(--border);
}

.sim-card__cta {
    font-size: 0.775rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color var(--transition);
}

.sim-card__arrow {
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: transform var(--transition), color var(--transition);
}

.sim-card:hover .sim-card__cta  { color: var(--text); }
.sim-card:hover .sim-card__arrow { transform: translateX(5px); color: var(--text); }

/* ---------- Footer ---------- */

.site-footer {
    margin-top: auto;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
}

.site-footer p {
    font-size: 0.775rem;
    color: var(--text-muted);
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
    .sim-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 580px) {
    .container {
        padding: 0 1.25rem;
    }

    .site-header {
        padding: 3rem 0 2.5rem;
    }

    .sim-grid {
        grid-template-columns: 1fr;
    }
}