/* ============================================================
   OVERKNIGHT / GameWaveStudios — Design System v2
   One UI–inspired dark theme: deep navy/black, Samsung blue,
   large soft rounded corners, system font stack.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;600;700;900&display=swap');

:root {
  /* Color tokens — One UI dark */
  --bg-0:          #0a0d12;   /* deepest background */
  --bg-1:          #111621;   /* page background */
  --bg-card:       #1a2030;   /* card / sheet surface */
  --bg-card-hi:    #212940;   /* raised card / hover */
  --stroke:        rgba(255,255,255,0.07);
  --stroke-hi:      rgba(255,255,255,0.14);

  --blue:          #4c8dff;   /* Samsung-style accent blue */
  --blue-hi:       #6ea2ff;
  --blue-dim:      #2a5cc9;
  --grad-accent:   linear-gradient(135deg, #5b93ff 0%, #3a6ee8 100%);

  --text-hi:       #f5f7fb;
  --text-mid:      #aab3c5;
  --text-dim:      #6b7488;

  --ok:            #38d38f;
  --warn:          #ffb648;

  /* Radii — the signature: large, smooth, consistent */
  --r-xl: 28px;
  --r-lg: 22px;
  --r-md: 16px;
  --r-sm: 12px;
  --r-pill: 999px;

  --shadow-card: 0 10px 30px rgba(0,0,0,0.35);
  --shadow-float: 0 16px 44px rgba(76,141,255,0.18);

  --f-sys: 'Roboto', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg-1);
  color: var(--text-mid);
  font-family: var(--f-sys);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Ambient glow — soft, not gridded */
body::before {
  content: '';
  position: fixed;
  top: -20%; left: 50%;
  transform: translateX(-50%);
  width: 900px; height: 900px;
  background: radial-gradient(circle, rgba(76,141,255,0.10) 0%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--blue-hi); text-decoration: none; }
a:hover { color: var(--text-hi); }
img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--f-sys);
  color: var(--text-hi);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--blue-hi);
  margin-bottom: 0.75rem;
}

.section-head { max-width: 640px; margin: 0 0 2.4rem; }
.section-head h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
.section-head p { margin-top: 0.8rem; color: var(--text-mid); font-size: 1.02rem; }

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 clamp(1.2rem, 4vw, 2.5rem);
  position: relative;
  z-index: 1;
}

section { padding: clamp(3rem, 6vw, 5.5rem) 0; position: relative; z-index: 1; }

/* ---------- Buttons — One UI pill buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-sys);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.9rem 1.7rem;
  border: none;
  cursor: pointer;
  border-radius: var(--r-pill);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, opacity 0.16s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--grad-accent); color: #fff; box-shadow: var(--shadow-float); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost {
  background: var(--bg-card);
  color: var(--text-hi);
  border: 1px solid var(--stroke-hi);
}
.btn-ghost:hover { background: var(--bg-card-hi); }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled], .btn.is-disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

/* ---------- Card — signature surface ---------- */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--r-xl);
  padding: 1.8rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.panel:hover { border-color: var(--stroke-hi); }

/* ---------- Top Navigation ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,13,18,0.72);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--stroke);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem clamp(1.2rem, 4vw, 2.5rem);
  max-width: 1160px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--f-sys);
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--text-hi);
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 9px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 0.3rem;
  list-style: none;
  font-weight: 500;
  font-size: 0.92rem;
}
.nav-links a {
  color: var(--text-mid);
  padding: 0.5rem 0.85rem;
  border-radius: var(--r-pill);
  display: inline-block;
}
.nav-links a:hover { color: var(--text-hi); background: var(--bg-card); }
.nav-links a.active { color: #fff; background: var(--blue-dim); }
.nav-cta { display: flex; align-items: center; gap: 0.8rem; }
.nav-toggle {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--stroke-hi);
  color: var(--text-hi);
  width: 42px; height: 40px;
  border-radius: var(--r-md);
  cursor: pointer;
  font-size: 1.1rem;
}

@media (max-width: 940px) {
  .nav-links {
    position: fixed;
    top: 64px; left: 0.8rem; right: 0.8rem;
    flex-direction: column;
    gap: 0.2rem;
    background: var(--bg-card);
    border: 1px solid var(--stroke);
    border-radius: var(--r-lg);
    padding: 0.5rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.28s ease, opacity 0.2s ease;
    box-shadow: var(--shadow-card);
  }
  .nav-links.open { max-height: 560px; opacity: 1; }
  .nav-links a { display: block; padding: 0.85rem 1rem; border-radius: var(--r-md); }
  .nav-toggle { display: block; }
  .nav-cta .btn:not(.nav-toggle) { display: none; }
}

/* ---------- Stat row ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.7rem;
  margin-top: 2.6rem;
}
.stat-cell {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
  padding: 1.2rem 1rem;
  text-align: center;
}
.stat-cell .k {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}
.stat-cell .v { font-weight: 700; color: var(--text-hi); font-size: 1rem; }
@media (max-width: 800px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Grids ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.55rem;
  display: flex; align-items: center; gap: 0.65rem;
}
.feature-card .ic {
  width: 38px; height: 38px;
  flex-shrink: 0;
  background: rgba(76,141,255,0.12);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-hi);
  font-size: 1.05rem;
}
.feature-card p { font-size: 0.94rem; color: var(--text-mid); }
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border-radius: var(--r-pill);
  background: rgba(76,141,255,0.15);
  color: var(--blue-hi);
  margin-top: 0.8rem;
}
.tag.soon { color: var(--text-dim); background: rgba(255,255,255,0.05); }
.tag.done { color: var(--ok); background: rgba(56,211,143,0.12); }

/* ---------- Media frame — for real screenshots ---------- */
.shot {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: var(--bg-0);
}
.shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.shot-caption {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 0.6rem;
  text-align: center;
}

/* ---------- Placeholder art blocks (only where no real art exists) ---------- */
.art-block {
  aspect-ratio: 16/9;
  background: linear-gradient(160deg, var(--bg-card-hi), var(--bg-0));
  border: 1px solid var(--stroke);
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  text-align: center;
  padding: 1rem;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--stroke);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  position: relative; z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.2rem;
}
.footer-grid h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 0.9rem;
}
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 0.5rem; }
.footer-grid a { color: var(--text-mid); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--blue-hi); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--stroke);
  font-size: 0.82rem;
  color: var(--text-dim);
  flex-wrap: wrap; gap: 1rem;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- Changelog list (patch notes) ---------- */
.change-list { list-style: none; }
.change-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--stroke);
  font-size: 0.95rem;
  color: var(--text-mid);
}
.change-list li:last-child { border-bottom: none; }
.change-list .dot-done {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: rgba(56,211,143,0.15);
  color: var(--ok);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  margin-top: 0.1rem;
}
/* ---------- Weapon stats table ---------- */
.weapon-table-wrap { overflow-x: auto; border-radius: var(--r-lg); border: 1px solid var(--stroke); }
.weapon-table { width: 100%; border-collapse: collapse; min-width: 620px; font-size: 0.9rem; }
.weapon-table caption {
  text-align: left; padding: 0.9rem 1.1rem; font-weight: 700; font-size: 1rem;
  color: var(--text-hi); background: var(--bg-card-hi);
}
.weapon-table th, .weapon-table td { padding: 0.6rem 1.1rem; text-align: left; white-space: nowrap; }
.weapon-table thead th {
  color: var(--text-dim); font-weight: 600; font-size: 0.78rem;
  text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom: 1px solid var(--stroke-hi);
}
.weapon-table tbody tr { border-bottom: 1px solid var(--stroke); }
.weapon-table tbody tr:last-child { border-bottom: none; }
.weapon-table tbody tr:hover { background: rgba(255,255,255,0.03); }
.weapon-table td:first-child, .weapon-table th:first-child { color: var(--text-hi); font-weight: 600; }
.weapon-table td { color: var(--text-mid); }

.change-list .dot-progress {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: rgba(255,182,72,0.15);
  color: var(--warn);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  margin-top: 0.1rem;
}

/* ---------- Utility ---------- */
.text-center { text-align: center; margin-left: auto; margin-right: auto; }
.mt-lg { margin-top: 2.6rem; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

::selection { background: var(--blue); color: #fff; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--blue-dim); border-radius: var(--r-pill); border: 2px solid var(--bg-1); }