/* ============================================================
   INDEX PAGE
   ============================================================ */

/* ---- HERO (asymmetric) ---- */
.hero {
    padding: 4rem 3rem 3rem;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 3rem;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 3rem;
    width: 120px;
    height: 1px;
    background: var(--accent);
    opacity: 0.5;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
    opacity: 0.85;
}

.hero h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    letter-spacing: -0.045em;
    line-height: 0.95;
    margin-bottom: 1.25rem;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-sub {
    color: var(--muted);
    font-size: 0.83rem;
    max-width: 380px;
    line-height: 1.6;
}

/* Stats right panel */
.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    overflow: hidden;
    flex-shrink: 0;
    min-width: 140px;
    align-self: end;
    margin-bottom: 0.25rem;
}

.hero-stat {
    padding: 0.9rem 1.25rem;
    border-bottom: 1px solid var(--border);
    text-align: right;
}

.hero-stat:last-child { border-bottom: none; }

.hero-stat-value {
    display: block;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.5rem;
    color: var(--text);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.2rem;
}

.hero-stat-label {
    display: block;
    font-size: 0.6rem;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ---- GRID ---- */
main {
    padding: 2.5rem 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

/* ---- SCENARIO CARD ---- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

.scenario-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    opacity: 0;
    animation: fadeUp 0.5s var(--ease-out) forwards;
    animation-delay: calc(var(--i, 0) * 45ms + 80ms);
    transition: border-color 0.25s, transform 0.25s var(--ease-out);
}

.scenario-card:hover {
    border-color: var(--border2);
    transform: translateY(-2px);
}

/* Spotlight border */
.scenario-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 50%), rgba(74,143,212,0.12), transparent 75%);
    z-index: 0;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

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

.card-heading {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--surface2);
    z-index: 1;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.65;
    transition: opacity 0.4s, transform 0.5s var(--ease-out);
}

.card-img-placeholder {
    width: 100%;
    height: 100%;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(28,43,68,0.35) 39px, rgba(28,43,68,0.35) 40px),
        repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(28,43,68,0.35) 39px, rgba(28,43,68,0.35) 40px),
        linear-gradient(160deg, #080f1e 0%, #0f1a30 60%, #080e1c 100%);
}

.scenario-card:hover .card-img {
    opacity: 0.82;
    transform: scale(1.04);
}

.card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.1rem 1.2rem 1rem;
    background: linear-gradient(transparent, rgba(7,13,26,0.98));
}

.card-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
    line-height: 1.2;
}

.card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.7rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

.total-pts { color: var(--yellow); }

/* ---- CARD BODY ---- */
.card-body {
    padding: 0.9rem 1.2rem 1.1rem;
    position: relative;
    z-index: 1;
}

.card-desc {
    font-size: 0.77rem;
    color: var(--text-dim);
    line-height: 1.65;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

/* Ensure hidden attribute works even when display is set */
[hidden] { display: none !important; }

/* ---- CHALLENGES GRID (tag filter view) ---- */
#challenges-grid {
    padding: 2rem 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.challenge-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    opacity: 0;
    animation: fadeUp 0.4s var(--ease-out) forwards;
    animation-delay: calc(var(--i, 0) * 35ms + 40ms);
    transition: border-color 0.2s;
}

.challenge-card-img {
    height: 90px;
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    transition: opacity 0.3s;
}
.challenge-card:hover .challenge-card-img { opacity: 0.65; }

.challenge-card-body { padding: 0.9rem 1.1rem; }

.challenge-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), rgba(74,143,212,0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.challenge-card:hover { border-color: var(--border2); }
.challenge-card:hover::before { opacity: 1; }

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.35rem;
}

.challenge-scenario {
    font-size: 0.65rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.challenge-pts {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--yellow);
}

.challenge-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.93rem;
    margin-bottom: 0.4rem;
    color: var(--text);
    line-height: 1.3;
}

.challenge-desc {
    font-size: 0.74rem;
    color: var(--text-dim);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.challenge-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .hero { grid-template-columns: 1fr; gap: 2rem; padding: 2rem 1.25rem 1.75rem; }
    .hero-stats { align-self: start; flex-direction: row; min-width: 0; }
    .hero-stat { border-bottom: none; border-right: 1px solid var(--border); flex: 1; text-align: center; }
    .hero-stat:last-child { border-right: none; }
    main { padding: 1.25rem; grid-template-columns: 1fr; }
    #challenges-grid { padding: 1.25rem; grid-template-columns: 1fr; }
}