/* intro.css (agent #10): loading screen, "?" button, about overlay. Motion stays on deliberately. */

/* ---------- loader ---------- */
#intro-loader {
  position: fixed; inset: 0; z-index: 2000;
  display: grid; place-items: center;
  background:
    radial-gradient(120% 90% at 50% 40%, var(--navy-3, #12273F) 0%, var(--navy-1, #060D18) 55%, var(--navy-0, #04080F) 100%);
  transition: opacity 0.9s ease, visibility 0s linear 0.9s;
  overflow: hidden;
}
#intro-loader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
#intro-loader.is-done .intro-center { transform: scale(1.06); filter: blur(2px); }

.intro-rays {
  position: absolute; left: 50%; top: 42%; width: 160vmax; height: 160vmax;
  transform: translate(-50%, -50%);
  background: repeating-conic-gradient(from 0deg, rgba(242, 199, 102, 0.07) 0deg 4deg, transparent 4deg 18deg);
  -webkit-mask-image: radial-gradient(circle, #000 0%, rgba(0, 0, 0, 0.5) 25%, transparent 55%);
  mask-image: radial-gradient(circle, #000 0%, rgba(0, 0, 0, 0.5) 25%, transparent 55%);
  animation: intro-rays 40s linear infinite;
  pointer-events: none;
}
@keyframes intro-rays { to { transform: translate(-50%, -50%) rotate(360deg); } }

.intro-center {
  position: relative; display: flex; flex-direction: column; align-items: center;
  padding: 0 16px; text-align: center;
  transition: transform 1s cubic-bezier(.2, .7, .2, 1), filter 1s ease;
}
.intro-mark {
  display: flex; flex-direction: column; align-items: center; gap: 0.08em;
  font-family: var(--font-title, "Cinzel", Georgia, serif); font-weight: 700;
  font-size: clamp(30px, 8.2vw, 76px); line-height: 1.02; letter-spacing: 0.14em;
  padding-left: 0.14em; /* optically balance the letter-spacing */
}
.intro-word {
  background: linear-gradient(100deg, #b8862f 0%, #F2C766 30%, #fff4d2 45%, #F2C766 60%, #b8862f 100%);
  background-size: 250% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 18px rgba(242, 199, 102, 0.35)) drop-shadow(0 2px 0 rgba(90, 60, 10, 0.6));
  animation: intro-shine 2.8s ease-in-out infinite, intro-rise 1s cubic-bezier(.2, .7, .2, 1) both;
}
.intro-word-2 { font-size: 0.78em; letter-spacing: 0.32em; padding-left: 0.32em; animation-delay: 0.15s, 0.12s; }
@keyframes intro-shine { 0% { background-position: 120% 0; } 60%, 100% { background-position: -30% 0; } }
@keyframes intro-rise { from { opacity: 0; transform: translateY(14px); letter-spacing: 0.3em; } to { opacity: 1; transform: none; } }

.intro-sub {
  margin-top: 18px; font-family: var(--font-ui, system-ui, sans-serif); font-size: 12px; font-weight: 600;
  letter-spacing: 0.42em; text-transform: uppercase; color: var(--muted, #9AA3AE);
  padding-left: 0.42em; animation: intro-rise 1s 0.3s cubic-bezier(.2, .7, .2, 1) both;
}
.intro-bar {
  position: relative; margin-top: 26px; width: min(240px, 60vw); height: 2px;
  background: rgba(242, 199, 102, 0.14); border-radius: 2px; overflow: hidden;
}
.intro-bar i {
  position: absolute; inset: 0; transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--gold-3, #C99A3F), var(--gold, #F2C766), #fff2cc);
  box-shadow: 0 0 10px rgba(242, 199, 102, 0.8);
  transition: transform 0.25s ease-out;
}
.intro-status {
  margin-top: 14px; min-height: 1.4em; font-size: 12px; letter-spacing: 0.06em;
  color: rgba(234, 227, 208, 0.55); font-family: var(--font-ui, system-ui, sans-serif);
}
.intro-reload {
  margin-left: 6px; padding: 3px 10px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--glass-border, rgba(242, 199, 102, 0.28)); background: transparent; color: var(--gold, #F2C766);
}

/* ---------- "?" button (bottom-right, above the safe area) ---------- */
.intro-about-btn {
  position: fixed; z-index: 40;
  right: calc(16px + env(safe-area-inset-right, 0px));
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center; padding: 0; cursor: pointer;
  font-family: var(--font-title, "Cinzel", Georgia, serif); font-weight: 700; font-size: 17px; line-height: 1;
  color: var(--gold, #F2C766);
  background: var(--glass, rgba(8, 18, 34, 0.72));
  border: 1px solid var(--glass-border, rgba(242, 199, 102, 0.28));
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  pointer-events: auto;
  opacity: 0; transform: scale(0.8);
  transition: opacity 0.6s ease 0.2s, transform 0.6s cubic-bezier(.2, .9, .3, 1.3) 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.intro-done .intro-about-btn { opacity: 1; transform: none; }
.intro-about-btn:hover, .intro-about-btn:focus-visible {
  border-color: var(--gold, #F2C766); box-shadow: 0 0 0 3px rgba(242, 199, 102, 0.15), 0 0 18px rgba(242, 199, 102, 0.35);
  outline: none;
}

/* ---------- about overlay ---------- */
.intro-about {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-items: center; padding: 16px;
  background: rgba(2, 5, 11, 0.6);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  opacity: 0; transition: opacity 0.3s ease;
}
.intro-about[hidden] { display: none; }
.intro-about.is-open { opacity: 1; }
.intro-about-card {
  position: relative; width: min(520px, 100%); max-height: calc(100dvh - 32px); overflow-y: auto;
  padding: 28px 26px 22px;
  background: linear-gradient(180deg, rgba(18, 39, 63, 0.92), rgba(6, 13, 24, 0.95));
  border: 1px solid var(--glass-border, rgba(242, 199, 102, 0.28)); border-radius: var(--radius, 14px);
  box-shadow: var(--shadow, 0 10px 40px rgba(0, 0, 0, 0.55)), inset 0 1px 0 rgba(242, 199, 102, 0.12);
  color: var(--text, #EAE3D0); font-size: 14px; line-height: 1.55;
  transform: translateY(12px) scale(0.98); transition: transform 0.35s cubic-bezier(.2, .8, .2, 1);
  outline: none;
}
.intro-about.is-open .intro-about-card { transform: none; }
.intro-about-card h2 {
  margin: 0 30px 8px 0; font-family: var(--font-title, "Cinzel", Georgia, serif); font-weight: 700;
  font-size: 22px; letter-spacing: 0.08em; color: var(--gold, #F2C766);
  text-shadow: 0 0 16px rgba(242, 199, 102, 0.35);
}
.intro-about-card h3 {
  margin: 0 0 6px; font-size: 11px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--gold-3, #C99A3F);
}
.intro-about-card p { margin: 0 0 10px; }
.intro-about-card a { color: var(--gold, #F2C766); text-decoration: none; border-bottom: 1px solid rgba(242, 199, 102, 0.35); }
.intro-about-card a:hover { border-bottom-color: var(--gold, #F2C766); }
.intro-about-lead { color: var(--cream, #F4E7C5); }
.intro-about-list { margin: 0 0 12px; padding-left: 18px; }
.intro-about-list li { margin-bottom: 6px; }
.intro-about-list li::marker { color: var(--gold, #F2C766); }
.intro-about-list b { color: var(--cream, #F4E7C5); font-weight: 600; }
.intro-about-hint { font-size: 12px; color: var(--muted, #9AA3AE); }
.intro-about-card a.intro-about-cta {
  display: inline-block; margin: 4px 0 18px; padding: 9px 16px; border-radius: 999px; border: 0;
  background: linear-gradient(180deg, #F7D888, var(--gold, #F2C766) 50%, var(--gold-3, #C99A3F));
  color: #1a1206; font-weight: 700; font-size: 13px;
  box-shadow: 0 4px 16px rgba(242, 199, 102, 0.25);
}
.intro-about-card a.intro-about-cta:hover { filter: brightness(1.08); }
.intro-about-credits { padding-top: 14px; border-top: 1px solid rgba(242, 199, 102, 0.16); font-size: 12px; color: var(--muted, #9AA3AE); }
.intro-about-credits p { margin-bottom: 6px; }
.intro-about-close {
  position: absolute; top: 12px; right: 12px; width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid transparent; background: transparent; color: var(--muted, #9AA3AE);
  font-size: 22px; line-height: 1; cursor: pointer;
}
.intro-about-close:hover, .intro-about-close:focus-visible { color: var(--gold, #F2C766); border-color: var(--glass-border, rgba(242, 199, 102, 0.28)); outline: none; }

@media (max-width: 520px) {
  .intro-about { place-items: end center; padding: 0; }
  .intro-about-card {
    width: 100%; max-height: 88dvh; border-radius: 18px 18px 0 0;
    padding: 24px 20px calc(20px + env(safe-area-inset-bottom, 0px));
    transform: translateY(40px);
  }
  .intro-about-btn { width: 34px; height: 34px; }
}