@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:wght@300;400;500&display=swap');

/* VARIABLES */
:root {
    --bg:    #13161a;
    --bg2:   #1a1e24;
    --bg3:   #20252d;
    --line:  rgba(255,255,255,.09);
    --w:     #eef0f3;
    --m:     #637080;
    --m2:    #9aaabb;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    color: var(--w);
    margin: 0;
    overflow-x: hidden;
}

/* NAVBAR */
.ep-nav {
    position: fixed;
    top: 0; width: 100%;
    z-index: 900;
    padding: 20px 0;
    transition: background .3s, padding .3s;
}
.ep-nav.scrolled {
    background: rgba(19,22,26,.92);
    backdrop-filter: blur(16px);
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
}
.ep-brand {
    font-family: 'Syne', sans-serif;
    font-size: 1rem; font-weight: 800;
    color: var(--w); text-decoration: none; letter-spacing: .06em;
}
.nl {
    color: var(--m); font-size: .72rem; font-weight: 500;
    letter-spacing: .1em; text-transform: uppercase;
    text-decoration: none; padding: 6px 12px; transition: color .2s;
}
.nl:hover { color: var(--w); }

/* HERO */
.proj-hero {
    min-height: 52vh;
    display: flex; align-items: flex-end;
    padding: 120px 0 60px;
    border-bottom: 1px solid var(--line);
    position: relative; overflow: hidden;
}
.proj-hero-bg {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 50% 60% at 65% 50%, rgba(160,185,220,.05) 0%, transparent 70%);
    pointer-events: none;
}
.proj-eyebrow {
    font-size: .65rem; font-weight: 500;
    letter-spacing: .25em; text-transform: uppercase;
    color: var(--m); margin-bottom: 14px;
}
.proj-h1 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2.4rem, 6vw, 4.5rem);
    font-weight: 800; line-height: .95;
    margin-bottom: 20px;
}
.proj-lead {
    max-width: 560px; font-size: .95rem;
    font-weight: 300; color: var(--m2); line-height: 1.8;
}

/* SECTIONS */
.proj-section { padding: 80px 0; border-bottom: 1px solid var(--line); }
.proj-section:last-of-type { border-bottom: none; }
.proj-section-alt { background: var(--bg2); }

.s-label {
    font-size: .62rem; font-weight: 500;
    letter-spacing: .25em; text-transform: uppercase;
    color: var(--m); margin-bottom: 8px;
}
.s-title {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700; line-height: 1.1;
}

/* BODY TEXT */
.proj-body {
    font-size: .93rem; font-weight: 300;
    color: var(--m2); line-height: 1.9;
}
.proj-body strong { color: var(--w); font-weight: 500; }

/* IMAGE */
.proj-img {
    border-radius: 6px; overflow: hidden;
    border: 1px solid var(--line);
}
.proj-img img {
    width: 100%; display: block;
    filter: grayscale(15%);
    transition: filter .4s, transform .4s;
}
.proj-img:hover img { filter: grayscale(0%); transform: scale(1.02); }

/* FEATURE CARDS */
.feat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1px;
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
    margin-top: 32px;
}
.feat-card {
    background: var(--bg2);
    padding: 28px 24px;
    transition: background .25s;
}
.feat-card:hover { background: var(--bg3); }
.feat-card-icon {
    font-size: 1.2rem; color: var(--m);
    margin-bottom: 12px;
    transition: color .25s;
}
.feat-card:hover .feat-card-icon { color: var(--w); }
.feat-card-title {
    font-family: 'Syne', sans-serif;
    font-size: .85rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .06em;
    margin-bottom: 8px;
}
.feat-card-text {
    font-size: .82rem; font-weight: 300;
    color: var(--m2); line-height: 1.7;
}

/* TECH TAGS */
.tech-tag {
    display: inline-block;
    border: 1px solid var(--line); color: var(--m2);
    font-size: .72rem; font-weight: 500;
    letter-spacing: .07em; padding: 5px 13px;
    border-radius: 2px; margin: 4px;
    transition: all .2s;
}
.tech-tag:hover { border-color: rgba(238,240,243,.28); color: var(--w); }

/* RELATED */
.related-section {
    padding: 80px 0;
    background: var(--bg2);
    border-top: 1px solid var(--line);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 36px;
}
.related-card {
    border: 1px solid var(--line);
    border-radius: 4px; overflow: hidden;
    text-decoration: none;
    background: var(--bg);
    transition: border-color .3s, transform .3s;
    display: block;
}
.related-card:hover {
    border-color: rgba(238,240,243,.22);
    transform: translateY(-4px);
}
.related-card img {
    width: 100%; height: 130px;
    object-fit: cover; display: block;
    filter: grayscale(20%);
    transition: filter .35s, transform .35s;
}
.related-card:hover img { filter: grayscale(0%); transform: scale(1.04); }
.related-card-body { padding: 14px 16px; }
.related-card-cat {
    font-size: .6rem; font-weight: 500;
    letter-spacing: .18em; text-transform: uppercase;
    color: var(--m); margin-bottom: 5px;
}
.related-card-name {
    font-family: 'Syne', sans-serif;
    font-size: .95rem; font-weight: 700;
    color: var(--w);
}

/* BACK BUTTON */
.back-link {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: .75rem; font-weight: 500;
    letter-spacing: .1em; text-transform: uppercase;
    color: var(--m); text-decoration: none;
    padding: 40px 0 20px;
    transition: color .2s, gap .2s;
}
.back-link:hover { color: var(--w); gap: 12px; }

/* REVEAL */
.rv { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.rv.on { opacity: 1; transform: translateY(0); }

/* RESPONSIVE */
@media (max-width: 768px) {
    .related-grid { grid-template-columns: 1fr; }
    .feat-grid { grid-template-columns: 1fr; }
}