/* ==========================================================================
   Star Letter — Dawn refinements and finale
   Expansion reading layout and the twin-star finale / certificate components.
   ========================================================================== */

/* ---------- Dawn refinements ---------- */
.scroll-cue {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  margin: 14px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: rgba(255, 240, 225, 0.62);
}

.scroll-cue i {
  font-style: normal;
  animation: cueBob 2.4s ease-in-out infinite;
}

.scroll-cue.is-hidden {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

body[data-scene="dawn"] .music-toggle {
  top: calc(env(safe-area-inset-top) + 14px);
  bottom: auto;
  right: calc(env(safe-area-inset-right) + 14px);
}

body[data-scene="finale"] .music-toggle {
  top: calc(env(safe-area-inset-top) + 14px);
  bottom: auto;
  right: calc(env(safe-area-inset-right) + 14px);
}

@media (min-width: 901px) {
  body[data-scene="dawn"] .music-toggle,
  body[data-scene="finale"] .music-toggle {
    top: auto;
    bottom: calc(env(safe-area-inset-bottom) + clamp(14px, 2.4vh, 22px));
  }
}

.scene--dawn.is-active .letter { animation-delay: 1.35s; }

.scene--dawn .dawn-actions {
  z-index: 6;
}

.btn-dawn--forward {
  border-color: rgba(74, 47, 42, 0.52);
  background: rgba(255, 246, 236, 0.68);
  color: #35201f;
  font-weight: 600;
}

.btn-dawn--forward:hover { background: rgba(255, 250, 242, 0.9); }

@media (min-width: 900px) {
  .scene--dawn .dawn-wrap {
    padding-top: calc(env(safe-area-inset-top) + clamp(46px, 6.6vh, 62px));
    padding-bottom: 152px;
  }

  .scene--dawn .dawn-head { gap: 0; }
  .scene--dawn .dawn-chapter { margin-bottom: clamp(12px, 1.8vh, 18px); }
  .scene--dawn .dawn-title { font-size: clamp(38px, 3.8vw, 52px); }
  .scene--dawn .dawn-sub { margin-top: 12px; font-size: clamp(12px, 1.15vw, 14px); }
  .scene--dawn .dawn-head .ornament { margin-top: 18px; }
  .scene--dawn .scroll-cue { margin-top: 12px; }

  .scene--dawn .letter {
    width: min(680px, calc(100vw - 48px));
    margin-top: 26px;
    padding: 32px 52px 34px;
  }

  .scene--dawn .letter__mark { width: min(190px, 54%); margin: -8px auto 22px; }
  .scene--dawn .wax-seal { width: 48px; height: 48px; font-size: 15px; }
  .scene--dawn .letter__greeting { font-size: 19px; margin-bottom: 15px; }
  .scene--dawn .letter__body { font-size: 16.5px; line-height: 1.82; }
  .scene--dawn .letter__body p { margin-bottom: 0.82em; }
  .scene--dawn .letter__sign {
    margin-top: 17px;
    font-size: 15.5px;
    line-height: 1.8;
  }

  .scene--dawn .dawn-footer { margin-top: 18px; }

  .scene--dawn.is-active .dawn-actions {
    position: fixed;
    left: 50%;
    bottom: calc(env(safe-area-inset-bottom) + 22px);
    margin: 0;
    padding: 8px 11px;
    transform: translateX(-50%);
    border: 1px solid rgba(74, 47, 42, 0.22);
    border-radius: 999px;
    background: rgba(43, 18, 30, 0.4);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    box-shadow: 0 16px 44px rgba(40, 10, 30, 0.24);
    animation: dockIn 0.9s var(--ease-out) 1.4s both;
  }

  .scene--dawn.is-active .dawn-actions::before {
    content: "";
    position: absolute;
    inset: -30px -80px -20px;
    z-index: -1;
    background: linear-gradient(180deg, transparent, rgba(44, 17, 28, 0.24) 55%, rgba(44, 17, 28, 0.42));
    pointer-events: none;
  }

  .scene--dawn .dawn-actions .btn-dawn {
    background: rgba(255, 246, 236, 0.76);
    border-color: rgba(74, 47, 42, 0.28);
  }

  .scene--dawn .dawn-actions .btn-dawn:hover { background: rgba(255, 250, 242, 0.96); }

  .scene--dawn.is-active .dawn-footer { animation-delay: 1.2s; }
}

/* ---------- Finale · twin stars & certificate ---------- */
.scene--finale {
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 217, 160, 0.24) transparent;
  -webkit-overflow-scrolling: touch;
}

.scene--finale::-webkit-scrollbar { width: 6px; }
.scene--finale::-webkit-scrollbar-track { background: transparent; }
.scene--finale::-webkit-scrollbar-thumb {
  background: rgba(255, 217, 160, 0.2);
  border-radius: 10px;
}

.finale-wrap {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  padding:
    calc(env(safe-area-inset-top) + clamp(66px, 9vh, 104px))
    clamp(14px, 5vw, 48px)
    calc(env(safe-area-inset-bottom) + 42px);
}

.finale-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.finale-chapter {
  margin: 0 0 clamp(14px, 2.2vh, 20px);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: rgba(255, 236, 214, 0.68);
}

.finale-chapter .num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 244, 225, 0.94);
}

.finale-chapter .rule {
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 236, 214, 0.55), transparent);
  transform: rotate(180deg);
}

.finale-chapter .lat {
  font-family: var(--font-latin);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: rgba(255, 236, 214, 0.46);
}

.finale-title {
  margin: 0;
  max-width: 880px;
  font-size: clamp(29px, 4.2vw, 54px);
  font-weight: 400;
  line-height: 1.32;
  letter-spacing: 0.06em;
  color: #fff3e3;
  text-shadow: 0 0 46px rgba(255, 214, 168, 0.22);
}

.finale-sub {
  margin: clamp(12px, 1.8vh, 18px) 0 0;
  font-size: clamp(12px, 1.25vw, 14px);
  letter-spacing: 0.18em;
  color: rgba(255, 242, 230, 0.7);
}

.binary {
  position: relative;
  width: min(380px, 78vw);
  aspect-ratio: 2.15;
  margin: clamp(16px, 2.6vh, 26px) auto clamp(14px, 2.4vh, 24px);
  flex: 0 0 auto;
}

.binary__orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px solid rgba(255, 217, 160, 0.18);
  border-radius: 50%;
  pointer-events: none;
}

.binary__orbit--outer {
  width: 92%;
  height: 82%;
  transform: translate(-50%, -50%) rotate(-8deg);
}

.binary__orbit--inner {
  width: 52%;
  height: 46%;
  border-color: rgba(255, 122, 168, 0.16);
  transform: translate(-50%, -50%) rotate(12deg);
}

.binary__core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #fff2d8;
  box-shadow:
    0 0 16px rgba(255, 236, 205, 0.7),
    0 0 46px rgba(255, 200, 150, 0.25);
}

.binary__trail {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 78%;
  height: 28%;
  transform: translate(-50%, -50%) rotate(-14deg);
  border-radius: 50%;
  border-top: 1px solid rgba(255, 122, 168, 0.22);
  filter: blur(0.5px);
  pointer-events: none;
}

.binary__trail--gold {
  width: 60%;
  height: 22%;
  transform: translate(-50%, -50%) rotate(14deg) scaleY(-1);
  border-top-color: rgba(255, 217, 160, 0.22);
}

.binary__pair {
  position: absolute;
  inset: 0;
  animation: binarySpin 34s linear infinite;
  transform-origin: 50% 50%;
}

.binary__star {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  transform: translateY(-50%);
}

.binary__star--rose {
  left: 12%;
  background: radial-gradient(circle at 40% 35%, #fff0e6 0%, #ffb7c8 22%, #ff7aa8 55%, rgba(255, 122, 168, 0) 100%);
  box-shadow: 0 0 16px rgba(255, 122, 168, 0.65), 0 0 44px rgba(255, 122, 168, 0.24);
}

.binary__star--gold {
  right: 12%;
  background: radial-gradient(circle at 40% 35%, #fffaf0 0%, #ffe3b0 22%, #ffd9a0 55%, rgba(255, 217, 160, 0) 100%);
  box-shadow: 0 0 16px rgba(255, 217, 160, 0.6), 0 0 44px rgba(255, 217, 160, 0.22);
}

.binary__dust {
  position: absolute;
  inset: 8% 12%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 236, 210, 0.7) 0 1px, transparent 1.8px),
    radial-gradient(circle at 74% 22%, rgba(255, 236, 210, 0.5) 0 1px, transparent 1.7px),
    radial-gradient(circle at 38% 74%, rgba(255, 236, 210, 0.45) 0 1px, transparent 1.6px),
    radial-gradient(circle at 86% 64%, rgba(255, 236, 210, 0.4) 0 1px, transparent 1.6px);
  animation: dustDrift 12s ease-in-out infinite alternate;
  pointer-events: none;
}

.certificate {
  position: relative;
  width: min(560px, 100%);
  flex: 0 0 auto;
}

.certificate__frame {
  position: relative;
  padding: clamp(26px, 3vw, 36px) clamp(20px, 3.8vw, 36px) clamp(22px, 3vw, 30px);
  border-radius: 2px;
  background-color: var(--paper);
  background-image:
    var(--noise),
    radial-gradient(ellipse at 50% 0%, rgba(255, 255, 255, 0.8), transparent 52%),
    linear-gradient(180deg, rgba(255, 244, 226, 0.62), rgba(245, 226, 201, 0.5));
  background-size: 180px 180px, auto, auto;
  color: #18203f;
  box-shadow:
    0 34px 90px rgba(0, 0, 0, 0.38),
    0 4px 16px rgba(20, 8, 20, 0.22),
    inset 0 0 60px rgba(160, 115, 80, 0.08);
  overflow: hidden;
}

.certificate__frame::before {
  content: "";
  position: absolute;
  inset: 9px;
  z-index: 0;
  border: 1px solid rgba(180, 136, 80, 0.55);
  pointer-events: none;
}

.certificate__frame::after {
  content: "";
  position: absolute;
  inset: 15px;
  z-index: 0;
  border: 1px solid rgba(24, 32, 63, 0.12);
  pointer-events: none;
}

.certificate__frame > * { position: relative; z-index: 1; }

.certificate__head { text-align: center; }

.certificate__label {
  margin: 0;
  font-family: var(--font-latin);
  font-size: clamp(8.5px, 0.95vw, 10px);
  letter-spacing: 0.28em;
  color: #8e6b3e;
}

.certificate__sub {
  margin: 7px 0 0;
  font-family: var(--font-latin);
  font-size: 7.5px;
  letter-spacing: 0.34em;
  color: rgba(24, 32, 63, 0.42);
}

.certificate__names {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 5px 14px;
  margin: clamp(16px, 2.6vh, 22px) 0 clamp(10px, 1.6vh, 14px);
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  color: #18203f;
}

.certificate__name {
  font-size: clamp(27px, 3vw, 36px);
  letter-spacing: 0.06em;
}

.cert-heart {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 400;
  color: #b85463;
}

.certificate__from {
  font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: #2c3354;
}

.certificate__map {
  position: relative;
  margin: clamp(8px, 1.4vh, 12px) auto 0;
  border: 1px solid rgba(180, 136, 80, 0.46);
  background:
    radial-gradient(ellipse at 50% 40%, rgba(78, 86, 156, 0.4), transparent 70%),
    #10162f;
  box-shadow: inset 0 0 38px rgba(5, 8, 24, 0.6);
  overflow: hidden;
}

.certificate__map svg {
  display: block;
  width: 100%;
  height: auto;
}

.certificate__map::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(216, 178, 118, 0.2);
  pointer-events: none;
}

.certificate__claim {
  margin: clamp(14px, 2.2vh, 18px) 0 0;
  text-align: center;
  font-size: clamp(12px, 1.35vw, 14px);
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: #293152;
}

.certificate__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: clamp(14px, 2.2vh, 18px);
  padding-top: 10px;
  border-top: 1px solid rgba(180, 136, 80, 0.3);
  font-family: var(--font-latin);
  font-size: clamp(8px, 0.9vw, 9.5px);
  letter-spacing: 0.18em;
  color: #7d654b;
}

.certificate__no { color: #56607f; }

.certificate__seal {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin: 12px auto 0;
  border-radius: 47% 53% 49% 51% / 52% 47% 53% 48%;
  transform: rotate(-5deg);
  background: radial-gradient(circle at 36% 30%, #c9575f 0%, #ac323f 42%, #84212f 78%, #5f1523 100%);
  box-shadow:
    inset 0 2px 3px rgba(255, 184, 180, 0.36),
    inset 0 -4px 8px rgba(60, 8, 20, 0.45),
    0 5px 12px rgba(74, 24, 20, 0.28);
  color: rgba(255, 225, 208, 0.9);
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.36);
}

.finale-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 11px;
  margin-top: clamp(24px, 3.8vh, 34px);
}

.btn-cert {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7em;
  min-height: 52px;
  padding: 0 28px;
  border: 1px solid rgba(255, 231, 186, 0.9);
  border-radius: 3px;
  background: linear-gradient(135deg, #ffe9c3 0%, #ffd9a0 44%, #ffbd8f 100%);
  color: #2b1420;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  cursor: pointer;
  box-shadow:
    0 10px 30px rgba(255, 180, 120, 0.18),
    0 0 40px rgba(255, 217, 160, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: transform 0.3s ease, box-shadow 0.4s ease, filter 0.3s ease;
  touch-action: manipulation;
}

.btn-cert:hover {
  filter: brightness(1.04);
  box-shadow:
    0 12px 38px rgba(255, 180, 120, 0.28),
    0 0 58px rgba(255, 217, 160, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.66);
}

.btn-cert:active { transform: translateY(1px); }
.btn-cert .dl { font-size: 14px; }

.btn-cert:focus-visible,
.btn-finale-ghost:focus-visible {
  outline: 2px solid rgba(255, 230, 190, 0.95);
  outline-offset: 4px;
}

.btn-finale-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid rgba(255, 217, 160, 0.32);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 240, 222, 0.82);
  font-family: var(--font-serif);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.btn-finale-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 217, 160, 0.58);
  color: #fff4e4;
}

.download-status {
  min-height: 16px;
  margin: 12px 0 0;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(255, 236, 210, 0.52);
  text-align: center;
}

.finale-footer {
  margin-top: clamp(18px, 2.6vh, 26px);
  font-family: var(--font-latin);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: rgba(255, 236, 214, 0.34);
  text-align: center;
}

.scene--finale.is-active .finale-head { animation: dawnRise 1.4s var(--ease-out) 0.15s both; }
.scene--finale.is-active .binary { animation: dawnRise 1.5s var(--ease-out) 0.4s both; }
.scene--finale.is-active .certificate { animation: certificateRise 1.9s var(--ease-out) 0.65s both; }
.scene--finale.is-active .finale-actions { animation: dawnRise 1.4s var(--ease-out) 1.35s both; }
.scene--finale.is-active .finale-footer { animation: dawnRise 1.4s var(--ease-out) 1.55s both; }