/* ---------- base ---------- */
:root {
  --ink: #eef1ff;
  --ink-soft: rgba(238, 241, 255, 0.72);
  --card-bg: rgba(18, 24, 58, 0.55);
  --card-edge: rgba(255, 255, 255, 0.14);
  --accent: #b9c6ff;
  --btn-bg: rgba(185, 198, 255, 0.16);
  --btn-bg-strong: rgba(185, 198, 255, 0.28);
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

html { background-color: #080b20; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(120% 60% at 50% 108%, rgba(96, 110, 190, 0.35) 0%, rgba(96, 110, 190, 0) 60%),
    linear-gradient(180deg, #232b52 0%, #131a3e 45%, #080b20 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ---------- sky ---------- */
.sky {
  position: fixed;
  inset: -6%;
  z-index: 0;
  pointer-events: none;
}

.layer { position: absolute; inset: 0; will-change: transform; }

.star {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.star.twinkle {
  animation: twinkle var(--dur, 4s) ease-in-out var(--delay, 0s) infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: var(--min, 0.2); }
  50% { opacity: var(--max, 1); }
}

/* A few stars flare with a glow instead of a smooth pulse. */
.star.sparkle { animation-name: sparkle; }

@keyframes sparkle {
  0%, 100% { opacity: var(--min, 0.2); transform: scale(1); box-shadow: 0 0 4px rgba(255, 255, 255, 0.4); }
  8%       { opacity: var(--max, 1); transform: scale(1.7); box-shadow: 0 0 12px rgba(255, 255, 255, 0.95); }
  20%      { opacity: calc(var(--min, 0.2) + 0.25); transform: scale(1.05); box-shadow: 0 0 5px rgba(255, 255, 255, 0.5); }
  45%      { opacity: var(--max, 1); transform: scale(1.35); box-shadow: 0 0 9px rgba(255, 255, 255, 0.8); }
  60%      { opacity: var(--min, 0.2); transform: scale(1); box-shadow: 0 0 4px rgba(255, 255, 255, 0.4); }
}

.shooting-star {
  position: absolute;
  width: 90px;
  height: 1.5px;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.9) 100%);
  transform: rotate(35deg);
  animation: shoot 1.8s ease-out forwards;
  opacity: 0;
}

@keyframes shoot {
  0% { opacity: 0; transform: rotate(35deg) translateX(0); }
  15% { opacity: 0.9; }
  100% { opacity: 0; transform: rotate(35deg) translateX(240px); }
}

@media (prefers-reduced-motion: reduce) {
  .star.twinkle, .star.sparkle { animation: none; }
  .shooting-star { display: none; }
}

/* ---------- scene / card ---------- */
.scene {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  padding: 3rem 1.25rem 4rem;
}

.card {
  max-width: 34rem;
  padding: 2.75rem 2.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-edge);
  border-radius: 20px;
  backdrop-filter: blur(6px);
  box-shadow:
    0 0 60px rgba(120, 140, 235, 0.18),
    0 20px 60px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.card-name {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-weight: 600;
  font-size: 2.4rem;
  margin: 0 0 1.1rem;
  letter-spacing: 0.01em;
}

.card-message {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.45rem;
  line-height: 1.65;
  margin: 0 0 1.4rem;
}

.card-signature {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: var(--btn-bg);
  border: 1px solid var(--card-edge);
  border-radius: 999px;
  padding: 0.7rem 1.6rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover, .btn:focus-visible { background: var(--btn-bg-strong); transform: translateY(-1px); }

.btn-primary { background: var(--btn-bg-strong); }

/* ---------- sign panel ---------- */
.sign-area { text-align: center; }

.panel {
  width: min(34rem, 100%);
  padding: 2rem 2rem 1.75rem;
  background: var(--card-bg);
  border: 1px solid var(--card-edge);
  border-radius: 20px;
  backdrop-filter: blur(6px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.panel h2 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-weight: 600;
  font-size: 1.6rem;
  margin: 0 0 0.4rem;
}

.panel-hint { color: var(--ink-soft); font-size: 0.95rem; margin: 0 0 1.25rem; line-height: 1.5; }

.panel label { display: block; font-size: 0.9rem; color: var(--ink-soft); margin: 1rem 0 0.35rem; }

.panel textarea, .panel input[type="text"] {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: rgba(8, 11, 32, 0.5);
  border: 1px solid var(--card-edge);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  resize: vertical;
}

.panel textarea:focus, .panel input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.char-count { text-align: right; font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.3rem; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.form-error { color: #ffb3b8; font-size: 0.95rem; }

.panel-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.4rem; }

/* ---------- notes (inside view) ---------- */
.notes { width: min(34rem, 100%); }

.note {
  background: rgba(56, 36, 76, 0.55);
  border: 1px solid rgba(226, 200, 255, 0.18);
  border-radius: 16px;
  backdrop-filter: blur(6px);
  padding: 1.4rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 0 30px rgba(170, 130, 235, 0.10);
}

.note-message {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.6;
  margin: 0 0 0.75rem;
  white-space: pre-wrap;
}

.note-byline { margin: 0; font-size: 0.85rem; color: var(--ink-soft); letter-spacing: 0.06em; }