/* Sprint 13: Yeni section tiplerinin (metrics / media / timeline) görsel stili.
   Tokens.css'i (--bg, --fg, --accent, ...) referans alır — light/dark/auto
   modlarda otomatik dönüşür. Templates'in kendi site.css'inden tamamen bağımsız;
   class isimleri `erp-*` prefiksi ile sandbox'lanmış (Bootstrap class'larıyla
   çatışmaz). */

/* ===== Metrics ===== */
.erp-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}
.erp-metric {
    text-align: center;
    padding: 1.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
    transition: transform .25s var(--ease-out), border-color .25s;
}
.erp-metric:hover {
    transform: translateY(-3px);
    border-color: var(--border-strong);
}
.erp-metric__value {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2rem, 3.5vw, 3rem);
    line-height: 1;
    color: var(--accent);
    letter-spacing: -.02em;
}
.erp-metric__label {
    margin-top: .5rem;
    color: var(--fg-muted);
    font-size: .95rem;
}

/* ===== Media Showcase ===== */
.erp-media {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
    align-items: center;
}
@media (min-width: 768px) {
    .erp-media--split { grid-template-columns: 1fr 1fr; }
}
.erp-media__frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-soft);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    aspect-ratio: 16 / 9;
}
.erp-media__frame iframe,
.erp-media__frame video,
.erp-media__frame img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    border: 0;
}
.erp-media__caption {
    color: var(--fg);
}
.erp-media__caption h3 {
    font-size: var(--type-h2);
    margin: 0 0 1rem;
    color: var(--fg);
    letter-spacing: -.02em;
}
.erp-media__caption p {
    color: var(--fg-muted);
    line-height: 1.65;
    margin: 0 0 1rem;
}
.erp-media__cta {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.5rem;
    background: var(--accent);
    color: var(--accent-fg);
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform .2s var(--ease-out);
}
.erp-media__cta:hover { transform: translateY(-2px); color: var(--accent-fg); }

/* ===== Timeline ===== */
.erp-timeline {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
}
.erp-timeline::before {
    content: "";
    position: absolute;
    left: 1.5rem;
    top: 0; bottom: 0;
    width: 2px;
    background: var(--border);
}
.erp-timeline__item {
    position: relative;
    padding-left: 4rem;
    padding-bottom: 2.5rem;
}
.erp-timeline__item::before {
    content: "";
    position: absolute;
    left: calc(1.5rem - 6px);
    top: .35rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--bg);
}
.erp-timeline__year {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--accent);
    letter-spacing: .02em;
}
.erp-timeline__title {
    margin: .15rem 0 .35rem;
    color: var(--fg);
    font-size: 1.15rem;
    font-weight: 600;
}
.erp-timeline__desc {
    color: var(--fg-muted);
    line-height: 1.6;
    margin: 0;
}

/* ===== Scroll Reveal ===== */
[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity .8s var(--ease-out),
        transform .8s var(--ease-out);
    will-change: opacity, transform;
}
[data-reveal="fade-right"] { transform: translateX(-24px); }
[data-reveal="fade-left"]  { transform: translateX(24px); }
[data-reveal="fade-in"]    { transform: none; }
[data-reveal="zoom-in"]    { transform: scale(.95); }

[data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

/* prefers-reduced-motion: animasyonu tamamen kapat, ama içerik görünür kalsın */
@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}