/* =====================================================================
   Getkey — 4K Anime Video Background Theme
   Chỉ áp dụng trên body.gk-page
   ===================================================================== */

body.gk-page {
  --gk-void: #060812;
  --gk-blue: #38bdf8;
  --gk-cyan: #38bdf8;
  --gk-indigo: #6366f1;
  --gk-paper: #f1f5f9;
  --gk-glass: rgba(10, 14, 26, 0.76);
  --gk-line: rgba(148, 163, 184, 0.2);
  --f-body: "Be Vietnam Pro", "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --f-display: "Be Vietnam Pro", "IBM Plex Sans Condensed", ui-sans-serif, system-ui, sans-serif;
  --brass: #38bdf8;
  --brass-hi: #e0f2fe;
  --brass-mid: #38bdf8;
  --brass-bg: rgba(56, 189, 248, 0.14);
  --brass-bg2: rgba(99, 102, 241, 0.1);
  --brass-glow: rgba(56, 189, 248, 0.35);
  --brass-face-1: #e0f2fe;
  --brass-face-2: #38bdf8;
  --brass-face-3: #2563eb;
  --brass-edge: #1e3a8a;
  --brass-ink: #030712;
  --brass-line: #38bdf8;
  --r: 14px;
  --r-lg: 18px;
  --r-xl: 24px;
  color: var(--gk-paper);
  background: var(--gk-void);
  overflow-x: hidden;
  min-height: 100vh;
}

body.gk-page::before { display: none; }

/* ---------- Sân khấu Video Nền 4K ---------- */

.gk-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.gk-sky-par {
  position: absolute;
  inset: 0;
}

.gk-video-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  pointer-events: none;
}

/* ---------- Khung chính ---------- */

body.gk-page .gk-shell {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 36px 16px 28px;
}

.gk-float {
  width: 100%;
  max-width: 520px;
  animation: gk-card-in .5s cubic-bezier(.16, 1, .3, 1) both;
}

@keyframes gk-card-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

body.gk-page .gk-card {
  position: relative;
  width: 100%;
  border-radius: 22px;
  background:
    linear-gradient(165deg, rgba(255, 255, 255, .06), transparent 30%),
    linear-gradient(180deg, rgba(12, 16, 28, .84), rgba(6, 9, 18, .9));
  border: 1px solid rgba(148, 163, 184, .18);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .12) inset,
    0 24px 64px -16px rgba(0, 0, 0, .85),
    0 0 50px -15px rgba(56, 189, 248, .2);
  backdrop-filter: blur(20px) saturate(1.25);
  -webkit-backdrop-filter: blur(20px) saturate(1.25);
  overflow: hidden;
}

body.gk-page .gk-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, transparent, #38bdf8, #6366f1, transparent);
  opacity: .95;
}

body.gk-page .gk-head {
  padding: 22px 24px 18px;
  border-bottom: 1px solid rgba(148, 163, 184, .12);
  text-align: center;
}

body.gk-page .gk-head .brand { padding: 0 0 10px; }

body.gk-page .gk-head h1 {
  font-size: clamp(1.5rem, 3.8vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.2;
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 80%, #a5b4fc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0;
}

body.gk-page .brand-mark {
  background: linear-gradient(160deg, #38bdf8, #6366f1);
  color: #030712;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .2), 0 6px 18px rgba(99, 102, 241, .3);
}

body.gk-page .brand-text strong { color: #fff; }
body.gk-page .brand-text span { color: #94a3b8; }
body.gk-page .gk-head .sm {
  color: rgba(241, 245, 249, .75) !important;
  font-size: .88rem;
}
body.gk-page .gk-body { padding: 20px 22px 24px; }

/* ---------- Game cards ---------- */

body.gk-page .gk-games { gap: 10px; margin: 12px 0 6px; }

body.gk-page .gk-game {
  position: relative;
  overflow: hidden;
  padding: 13px 15px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .05), rgba(56, 189, 248, .04) 50%, rgba(99, 102, 241, .05));
  border: 1px solid rgba(148, 163, 184, .18);
  box-shadow: 0 8px 20px -10px rgba(0, 0, 0, .6);
  transition: all .2s cubic-bezier(.2, .8, .2, 1);
}

body.gk-page .gk-game:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, .5);
  background: linear-gradient(135deg, rgba(255, 255, 255, .08), rgba(56, 189, 248, .08) 50%, rgba(99, 102, 241, .08));
  box-shadow: 0 12px 28px -10px rgba(56, 189, 248, .3);
}

body.gk-page .gk-game-ic {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: #38bdf8;
  background: linear-gradient(160deg, rgba(56, 189, 248, .2), rgba(99, 102, 241, .15));
  border: 1px solid rgba(255, 255, 255, .1);
}

body.gk-page .gk-game-t b { color: #fff; font-weight: 700; }
body.gk-page .gk-game-t span { color: #94a3b8; }
body.gk-page .gk-game-n {
  color: #38bdf8;
  background: rgba(56, 189, 248, .1);
  border-color: rgba(56, 189, 248, .25);
}
body.gk-page .gk-game-go { color: #818cf8; }

body.gk-page .gk-pick {
  background: rgba(56, 189, 248, .08);
  box-shadow: none;
  border: 1px solid rgba(56, 189, 248, .22);
  border-radius: 14px;
}
body.gk-page .gk-pick > svg { color: #38bdf8; }
body.gk-page .gk-pick a { color: #818cf8; font-weight: 600; }

/* ---------- Steps / Key / Meta ---------- */

body.gk-page .step-dot {
  border-radius: 50%;
  background: rgba(10, 14, 26, .7);
  border-color: rgba(148, 163, 184, .25);
  color: #94a3b8;
}
body.gk-page .step-line { background: rgba(148, 163, 184, .12); box-shadow: none; }

body.gk-page .step.done .step-dot {
  color: #030712;
  background: linear-gradient(160deg, #38bdf8, #818cf8);
  border-color: transparent;
  box-shadow: 0 0 14px rgba(56, 189, 248, .4);
}
body.gk-page .step.done .step-line {
  background: linear-gradient(90deg, #38bdf8, #818cf8);
}
body.gk-page .step.now .step-dot {
  color: #38bdf8;
  border-color: #38bdf8;
  box-shadow: 0 0 0 4px rgba(56, 189, 248, .15), 0 0 16px rgba(56, 189, 248, .4);
}

body.gk-page .key-out {
  background: rgba(6, 9, 18, .65);
  border: 1px solid rgba(56, 189, 248, .4);
  box-shadow: 0 0 30px rgba(56, 189, 248, .18);
  border-radius: 14px;
}
body.gk-page .key-out code {
  color: #38bdf8;
  text-shadow: 0 0 16px rgba(56, 189, 248, .4);
  font-size: 1.14rem;
}

body.gk-page .meta-list {
  border: 1px solid rgba(148, 163, 184, .14);
  border-radius: 14px;
  background: rgba(6, 9, 18, .35);
  box-shadow: none;
}
body.gk-page .meta-row {
  background: transparent;
  border-bottom: 1px solid rgba(148, 163, 184, .1);
}
body.gk-page .meta-row span { color: #94a3b8; }
body.gk-page .meta-row b { color: #fff; font-family: var(--f-body); }

body.gk-page .task-box {
  background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(6, 9, 18, .3));
  border-color: rgba(148, 163, 184, .18);
  border-radius: 16px;
}
body.gk-page .task-box-step {
  color: #818cf8;
  background: rgba(99, 102, 241, .12);
  border-color: rgba(99, 102, 241, .28);
}
body.gk-page .task-timer {
  background: rgba(6, 9, 18, .45);
  border-radius: 12px;
}

body.gk-page .btn,
body.gk-page .btn-primary {
  border-radius: 12px;
  font-weight: 700;
}
body.gk-page .btn-primary,
body.gk-page a.btn-primary {
  background: linear-gradient(92deg, #0ea5e9, #6366f1);
  border: 0;
  color: #fff;
  text-shadow: none;
  box-shadow: 0 8px 24px -8px rgba(14, 165, 233, .55);
  transition: all .2s ease;
}
body.gk-page .btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 12px 28px -6px rgba(99, 102, 241, .6);
}
body.gk-page .copy {
  color: #38bdf8;
  border-color: rgba(56, 189, 248, .3);
}

body.gk-page .flash {
  border-radius: 14px;
  backdrop-filter: blur(12px);
}
body.gk-page .flash.success { border-color: rgba(56, 189, 248, .4); }
body.gk-page .flash.error { border-color: rgba(239, 68, 68, .45); }

body.gk-page .input {
  background: rgba(6, 9, 18, .6);
  border-color: rgba(148, 163, 184, .25);
  color: #fff;
  border-radius: 12px;
}
body.gk-page .input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .2);
}
body.gk-page .help,
body.gk-page .mute,
body.gk-page .xs.mute { color: rgba(241, 245, 249, .55); }
body.gk-page .hr { border-color: rgba(148, 163, 184, .14); }

body.gk-page .gk-legal {
  margin: 16px 0 0;
  text-align: center;
  font-size: .72rem;
  color: rgba(241, 245, 249, .45);
}

/* ---------- Responsive Mobile ---------- */

@media (max-width: 900px) {
  .gk-video-bg {
    object-position: 70% center;
  }
  body.gk-page .gk-shell {
    place-items: center;
    padding: 20px 12px;
  }
}

@media (max-width: 480px) {
  body.gk-page .gk-head { padding: 18px 16px 14px; }
  body.gk-page .gk-body { padding: 16px 14px 20px; }
}