/* 第一语言星球首页 v1 —— 复用 design-tokens 三层令牌（5主题自动生效） */

.fph-root {
  position: fixed; inset: 0; overflow: hidden;
  background:
    radial-gradient(120% 60% at 50% 108%, var(--primitive-nebula-a), transparent 60%),
    linear-gradient(180deg, var(--primitive-bg-d) 0%, var(--primitive-bg-c) 46%, var(--primitive-bg-b) 72%, var(--primitive-bg-a) 100%);
  color: var(--content-primary);
  font-family: inherit;
}
.fph-starfield { position: absolute; inset: 0; width: 100%; height: 100%; opacity: var(--primitive-scene-opacity, 0.8); }

/* 湖面：底部 26%，微光反射 */
.fph-lake {
  position: absolute; left: 0; right: 0; bottom: 0; height: 26%;
  background:
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--primitive-cool-glow) 9%, transparent) 24%, color-mix(in srgb, var(--primitive-bg-d) 78%, transparent)),
    repeating-linear-gradient(180deg, color-mix(in srgb, var(--primitive-glass-top) 4%, transparent) 0 1px, transparent 1px 7px);
  border-top: 1px solid color-mix(in srgb, var(--primitive-glass-edge) 55%, transparent);
}

/* 暗星球：大爆炸废墟，等待被点亮 */
.fph-dark-planet {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, color-mix(in srgb, var(--primitive-text-faint) 34%, transparent), color-mix(in srgb, var(--primitive-bg-d) 92%, transparent) 62%);
  box-shadow: inset -6px -8px 18px color-mix(in srgb, var(--primitive-bg-d) 88%, transparent), 0 0 22px color-mix(in srgb, var(--primitive-nebula-b) 60%, transparent);
  transition: transform 1.1s cubic-bezier(.2,.8,.2,1), opacity 1.1s;
}
.fph-dark-planet.d1 { width: 46px; height: 46px; left: 16%; top: 30%; }
.fph-dark-planet.d2 { width: 30px; height: 30px; right: 20%; top: 24%; }
.fph-dark-planet.d3 { width: 20px; height: 20px; right: 12%; top: 47%; }
.stage-world .fph-dark-planet { opacity: .5; transform: translateY(-14px); }

/* 第一语言星球：光从黑暗中涌出的凝聚体 */
.fph-planet-wrap {
  position: absolute; left: 50%; top: 44%;
  transform: translate(-50%, -50%);
  transition: top 1.1s cubic-bezier(.2,.8,.2,1), transform 1.1s cubic-bezier(.2,.8,.2,1);
}
.stage-world .fph-planet-wrap { top: 21%; transform: translate(-50%, -50%) scale(.42); }

.fph-planet {
  position: relative; width: min(300px, 46vw); aspect-ratio: 1; border-radius: 50%;
  background:
    radial-gradient(circle at 50% 46%, color-mix(in srgb, var(--primitive-star-bright) 88%, transparent) 0 5%, transparent 22%),
    radial-gradient(closest-side, color-mix(in srgb, var(--primitive-cool-glow) 46%, transparent), color-mix(in srgb, var(--primitive-bg-c) 88%, transparent) 74%);
  box-shadow:
    0 0 60px color-mix(in srgb, var(--primitive-cool-glow) 34%, transparent),
    0 0 140px color-mix(in srgb, var(--primitive-nebula-a) 70%, transparent),
    inset 0 0 46px color-mix(in srgb, var(--primitive-bg-d) 80%, transparent);
  animation: fph-breathe 7s ease-in-out infinite;
}
.fph-planet .band {
  position: absolute; inset: 8%; border-radius: 50%;
  border: 1.5px solid transparent;
  border-top-color: color-mix(in srgb, var(--primitive-warm-glow) 78%, transparent);
  border-right-color: color-mix(in srgb, var(--primitive-warm-glow) 26%, transparent);
  filter: blur(.4px);
}
.fph-planet .b1 { animation: fph-spin 26s linear infinite; }
.fph-planet .b2 { inset: 20%; animation: fph-spin 17s linear infinite reverse; border-top-color: color-mix(in srgb, var(--primitive-cool-glow) 70%, transparent); }
.fph-planet .core {
  position: absolute; left: 50%; top: 50%; width: 12%; height: 12%; transform: translate(-50%,-50%);
  border-radius: 50%;
  background: radial-gradient(circle, var(--primitive-star-bright), color-mix(in srgb, var(--primitive-warm-glow) 70%, transparent) 60%, transparent 75%);
  filter: blur(1px);
}
.fph-planet .halo {
  position: absolute; inset: -14%; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--primitive-cool-glow) 40%, transparent);
  opacity: .6;
}
.fph-planet-reflection {
  position: absolute; left: 50%; top: calc(100% + 8px); width: 64%; height: 46%;
  transform: translateX(-50%) scaleY(-1);
  background: radial-gradient(50% 60% at 50% 0%, color-mix(in srgb, var(--primitive-cool-glow) 30%, transparent), transparent 70%);
  filter: blur(6px); opacity: .5;
}
@keyframes fph-breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.035); } }
@keyframes fph-spin { to { transform: rotate(360deg); } }

/* 首屏：编号门 */
.fph-gate {
  position: absolute; inset: 0; display: grid; align-content: end; justify-items: center;
  padding-bottom: 9vh; gap: 10px; text-align: center;
}
.fph-brand { position: absolute; top: 4.5vh; left: 0; right: 0; display: grid; gap: 6px; }
.fph-brand b { font-size: 20px; letter-spacing: .34em; color: var(--content-primary); }
.fph-brand span { font-size: 13px; letter-spacing: .3em; color: var(--content-secondary); }
.fph-brand em { font-style: normal; font-size: 11px; letter-spacing: .42em; color: var(--content-muted); }
.fph-claim { position: absolute; top: 58%; left: 0; right: 0; margin: 0; display: grid; gap: 3px; }
.fph-claim i { font-style: normal; font-size: 10.5px; letter-spacing: .3em; color: var(--content-faint); }
.fph-claim strong { font-size: 12px; letter-spacing: .22em; color: var(--content-muted); }
.fph-title { margin: 0; font-size: clamp(22px, 3vw, 32px); font-weight: 700; letter-spacing: .12em; color: var(--content-primary); }
.fph-gatebox {
  display: flex; align-items: center; gap: 8px;
  width: min(560px, calc(100vw - 64px));
  padding: 8px 8px 8px 18px;
  border: 1px solid var(--primitive-glass-edge); border-radius: 14px;
  background: color-mix(in srgb, var(--primitive-glass) 78%, transparent);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 60px color-mix(in srgb, var(--primitive-shadow) 55%, transparent);
}
.fph-gatebox input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: transparent;
  color: var(--content-primary); font-size: 15px; letter-spacing: .08em;
  font-family: inherit;
}
.fph-gatebox input::placeholder { color: var(--content-faint); letter-spacing: .04em; }
.fph-inf {
  width: 40px; height: 40px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--primitive-glass-edge); background: var(--primitive-glass);
  color: var(--content-muted); font-size: 18px; line-height: 1;
  transition: all .25s ease;
}
.fph-inf.lit {
  color: var(--primitive-star-bright);
  border-color: color-mix(in srgb, var(--primitive-warm-glow) 60%, transparent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--primitive-warm-glow) 42%, transparent);
  background: color-mix(in srgb, var(--primitive-warm-glow) 14%, transparent);
}
.fph-enter {
  height: 40px; padding: 0 18px; border-radius: 10px; border: 0; cursor: pointer;
  background: var(--button-primary-bg); color: var(--button-primary-text);
  font-weight: 700; letter-spacing: .1em; font-family: inherit;
  box-shadow: var(--button-primary-shadow);
  transition: opacity .2s ease, transform .2s ease;
}
.fph-enter:disabled { opacity: .38; cursor: not-allowed; box-shadow: none; }
.fph-gate-msg { margin: 0; min-height: 18px; font-size: 12px; letter-spacing: .1em; color: var(--content-muted); }
.fph-foot { position: absolute; bottom: 2.6vh; left: 0; right: 0; font-size: 10.5px; letter-spacing: .3em; color: var(--content-faint); }

/* 门后：世界展开 */
.fph-world {
  position: absolute; inset: 0; display: grid; align-content: center; justify-items: center;
  gap: 26px; padding: 12vh 24px 8vh;
  animation: fph-world-in .9s ease both;
}
@keyframes fph-world-in { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.fph-world-head { text-align: center; display: grid; gap: 8px; margin-top: 9vh; }
.fph-world-kicker { font-size: 11px; letter-spacing: .34em; color: var(--accent-light); }
.fph-world-head h1 { margin: 0; font-size: clamp(24px, 3vw, 36px); letter-spacing: .14em; color: var(--content-primary); }
.fph-world-head p { margin: 0; font-size: 13px; letter-spacing: .1em; color: var(--content-muted); }
.fph-world-head b { color: var(--content-secondary); letter-spacing: .12em; }
.fph-pools {
  display: grid; grid-template-columns: repeat(3, minmax(180px, 240px)); gap: 16px;
  justify-content: center;
}
.fph-pool {
  position: relative; display: grid; gap: 6px; justify-items: start; text-align: left;
  padding: 18px 18px 16px; border-radius: 16px; cursor: pointer;
  border: 1px solid var(--primitive-glass-edge);
  background: color-mix(in srgb, var(--primitive-glass) 72%, transparent);
  backdrop-filter: blur(14px);
  color: inherit; font-family: inherit;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.fph-pool:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--primitive-cool-glow) 46%, var(--primitive-glass-edge)); }
.fph-pool .pool-light {
  position: absolute; top: 14px; right: 14px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--primitive-cool-glow); box-shadow: 0 0 12px var(--primitive-cool-glow);
}
.fph-pool.tone-warm .pool-light { background: var(--primitive-warm-glow); box-shadow: 0 0 12px var(--primitive-warm-glow); }
.fph-pool b { font-size: 15px; letter-spacing: .08em; color: var(--content-primary); }
.fph-pool small { font-size: 11.5px; letter-spacing: .06em; color: var(--content-muted); }
.fph-pool.primary { border-color: color-mix(in srgb, var(--primitive-warm-glow) 46%, var(--primitive-glass-edge)); }
.fph-world-note { margin: 0; font-size: 12px; letter-spacing: .14em; color: var(--content-muted); }
.fph-back {
  position: absolute; left: 22px; top: 22px; border: 0; background: transparent; cursor: pointer;
  color: var(--content-muted); font-size: 12.5px; letter-spacing: .08em; font-family: inherit;
}
@media (max-width: 860px) {
  .fph-pools { grid-template-columns: repeat(2, minmax(150px, 1fr)); width: 100%; }
}