/* ============================================================
   Boss Mana — Base: reset, typography, atmosphere, header
   ============================================================ */

*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  font-weight: 300;
  color: var(--text-soft);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(120% 75% at 50% -12%, oklch(22% 0.025 78 / 0.5), transparent 58%),
    radial-gradient(70% 55% at 105% 105%, oklch(40% 0.06 168 / 0.16), transparent 55%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: 0.01em;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
em { font-style: normal; }

::selection { background: var(--gold-3); color: var(--on-gold); }

:focus-visible {
  outline: 2px solid var(--gold-2);
  outline-offset: 3px;
  border-radius: 2px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

/* --- Film grain overlay --- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.038;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--dur-slow) var(--ease-out) var(--d, 0s),
    transform var(--dur-slow) var(--ease-out) var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============ Buttons ============ */
.btn {
  --pad-y: 0.7em;
  --pad-x: 1.55em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: var(--pad-y) var(--pad-x);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease-out),
    box-shadow var(--dur) var(--ease-out),
    background var(--dur) var(--ease-out),
    color var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
}
.btn-lg { --pad-y: 0.9em; --pad-x: 1.9em; font-size: var(--text-sm); }

.btn-gold {
  background: var(--grad-gold);
  color: var(--on-gold);
  box-shadow: var(--shadow-gold);
}
.btn-gold:hover {
  transform: translateY(-1.5px);
  box-shadow: 0 20px 50px -22px var(--gold-glow);
}

.btn-line {
  border-color: var(--color-line);
  color: var(--text);
  background: oklch(100% 0 0 / 0.015);
  backdrop-filter: blur(4px);
}
.btn-line:hover {
  border-color: var(--gold-line);
  color: var(--gold-1);
  transform: translateY(-1.5px);
}

.btn-ghost {
  color: var(--text-soft);
  padding-inline: 0.6em;
}
.btn-ghost:hover { color: var(--gold-1); }

/* ============ Header ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out),
    backdrop-filter var(--dur) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: oklch(13% 0.012 70 / 0.82);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--color-line-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 76px;
}

.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand-mark { display: grid; place-items: center; transition: transform var(--dur) var(--ease-out); }
.brand:hover .brand-mark { transform: rotate(45deg); }
.brand-word { display: flex; flex-direction: column; line-height: 0.86; }
.brand-top {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: var(--tracking-wider);
  color: var(--text);
}
.brand-bottom {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: var(--tracking-wider);
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-left: 0.1em;
}

.nav { display: flex; gap: 2rem; }
.nav a {
  position: relative;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--text-soft);
  padding: 0.3rem 0;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: var(--grad-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.nav a:hover { color: var(--gold-1); }
.nav a:hover::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 0.9rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}
.nav-toggle span {
  display: block; width: 18px; height: 1.6px;
  background: var(--gold-1);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur-fast);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ---- Mobile nav ---- */
@media (max-width: 860px) {
  .nav {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: oklch(13% 0.012 70 / 0.97);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--color-line);
    padding: 0.5rem var(--shell-pad) 1.4rem;
    transform: translateY(-130%);
    transition: transform var(--dur) var(--ease-in-out);
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 0.95rem 0; border-bottom: 1px solid var(--color-line-soft); font-size: var(--text-lg); }
  .nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-ghost { display: none; }
}
@media (max-width: 480px) {
  .header-actions .btn-gold { padding-inline: 1.1em; }
}