/* ── RESET & VARIABLES ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0B1120;
  --surface: #111827;
  --surface2: #1F2937;
  --border: #263244;
  --accent: #2DD4BF;
  --accent2: #3B82F6;
  --accent3: #14B8A6;
  --text: #E5E7EB;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --nav-h: 68px;
}

html {
  scroll-behavior: smooth;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── SKIP TO CONTENT ── */
.skip-link {
  position: fixed; top: -100%; left: 1rem; z-index: 10000;
  background: var(--accent); color: var(--bg);
  padding: 0.75rem 1.25rem; border-radius: var(--radius-sm);
  font-weight: 600; text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0.75rem; }

/* ── FOCUS RING ── */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  height: var(--nav-h);
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
nav.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.4); }

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.05rem; font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--accent); transition: color var(--transition); }

.nav-right { display: flex; align-items: center; gap: 0.5rem; }

.nav-links {
  display: flex; gap: 0.25rem; list-style: none; align-items: center;
}
.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.875rem; font-weight: 500;
  padding: 0.5rem 0.75rem; border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative; white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--accent); }
.nav-links a[aria-current="page"] { color: var(--accent); }

.nav-cta {
  padding: 0.5rem 1.25rem !important;
  background: var(--accent) !important; color: var(--bg) !important;
  border-radius: var(--radius-sm) !important; font-weight: 600 !important;
  margin-left: 0.5rem;
}
.nav-cta:hover { background: #fff !important; color: var(--bg) !important; transform: translateY(-1px); }

/* Mobile hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; background: none; border: none;
  padding: 8px; border-radius: var(--radius-sm);
  transition: background var(--transition);
  z-index: 1001;
}
.hamburger:hover { background: rgba(255,255,255,0.06); }
.hamburger span {
  width: 22px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all 0.3s ease;
  display: block;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer overlay */
.nav-overlay {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
}
.nav-overlay.open { display: block; }

/* MAIN */
main { padding-top: var(--nav-h); }

main:focus-visible { outline: none; }

/* SECTIONS */
section { padding: clamp(3rem, 8vw, 5rem) 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 3px;
  margin-bottom: 0.75rem;
}

h1, h2, h3 { font-weight: 700; line-height: 1.15; }
h1 { font-size: clamp(2.2rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1rem, 2vw, 1.2rem); }

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.card:hover {
  border-color: rgba(31,191,138,0.4);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(31, 191, 138, 0.07);
}

.card img { aspect-ratio: 16 / 9; object-fit: cover; background: var(--surface2); display: block; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.875rem;
  text-decoration: none; cursor: pointer;
  transition: all var(--transition); border: none;
  font-family: var(--font-display);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(31,191,138,0.25); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(31,191,138,0.05); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--accent); }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.8rem; }

/* TAGS */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 100px; font-size: 0.72rem;
  color: var(--text-muted); font-family: var(--font-mono);
}
.tag-accent { background: rgba(31,191,138,0.08); border-color: rgba(31,191,138,0.25); color: var(--accent); }

/* GRID */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 1.25rem; }

/* MESSAGES / TOASTS */
.messages {
  position: fixed; top: calc(var(--nav-h) + 12px); right: 1rem; z-index: 2000;
  display: flex; flex-direction: column; gap: 0.5rem; max-width: calc(100vw - 2rem);
}
.msg {
  padding: 0.875rem 1.25rem; border-radius: var(--radius);
  font-size: 0.875rem; font-weight: 500;
  animation: slideIn 0.3s ease;
}
.msg-success { background: rgba(23, 168, 110, 0.12); border: 1px solid var(--accent3); color: var(--accent3); }
.msg-error { background: rgba(239, 68, 68, 0.12); border: 1px solid #EF4444; color: #EF4444; }
@keyframes slideIn { from { transform: translateX(110%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* FOOTER */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: clamp(1.5rem, 4vw, 2.5rem) 0;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 1.25rem; text-align: center; }
.footer-links { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; row-gap: 0.4rem; }
.footer-links a {
  color: var(--text-muted); text-decoration: none; font-size: 0.85rem;
  padding: 0.35rem 0.7rem; border-radius: var(--radius-sm);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
footer p { color: var(--text-dim); font-size: 0.8rem; }

/* UTILS */
.glow { filter: drop-shadow(0 0 20px rgba(31, 191, 138, 0.4)); }
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* SCROLL REVEAL */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* PAGE HERO (shared) */
.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(2rem, 4vw, 3rem);
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.page-hero-sub { color: var(--text-muted); margin-top: 0.6rem; max-width: 520px; font-size: clamp(0.9rem, 2vw, 1rem); line-height: 1.7; }

/* DIVIDER */
.section-divider { height: 1px; background: var(--border); margin: 0; }

/* PAGINATION */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 0.375rem; margin-top: 2.25rem; flex-wrap: wrap;
}
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px; padding: 0 0.625rem;
  border-radius: var(--radius-sm); font-size: 0.825rem;
  text-decoration: none; transition: all var(--transition);
}
.pagination a { background: var(--surface); border: 1px solid var(--border); color: var(--text-muted); }
.pagination a:hover { border-color: var(--accent); color: var(--accent); background: rgba(31,191,138,0.05); }
.pagination .current { background: var(--accent); color: var(--bg); font-weight: 700; border: 1px solid var(--accent); }
.pagination .disabled { opacity: 0.4; pointer-events: none; }
.pagination .step-links { display: flex; align-items: center; gap: 0.25rem; }
.pagination .step-links a, .pagination .step-links span { min-width: 36px; height: 36px; }

/* SCROLL INDICATORS FOR FILTER BARS */
.filter-bar-scroll, .tag-filter-scroll {
  position: relative;
}
.filter-bar-scroll::after, .tag-filter-scroll::after {
  content: ''; position: absolute; top: 0; right: 0; bottom: 0.5rem; width: 40px;
  background: linear-gradient(90deg, transparent, var(--bg));
  pointer-events: none; opacity: 0;
  transition: opacity 0.3s ease;
  opacity: calc(var(--scrollable, 0) * 1);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column; gap: 0.25rem;
    position: fixed; top: var(--nav-h); right: 0; bottom: 0;
    width: min(280px, 85vw);
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: 1.5rem 1rem;
    overflow-y: auto;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .nav-links.open { display: flex; transform: translateX(0); }
  .nav-links a { font-size: 1rem; padding: 0.75rem 1rem; border-radius: var(--radius-sm); }
  .nav-cta { margin: 0.5rem 0 0 0 !important; padding: 0.75rem 1rem !important; }
  .hamburger { display: flex; }
  .nav-right { gap: 0; }
}

@media (max-width: 480px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}