:root {
  --night-1: #0d0b1f;
  --night-2: #1a1040;
  --pink: #ff6eb4;
  --pink-soft: rgba(255, 110, 180, 0.35);
  --gold: #ffd966;
  --gold-dim: rgba(255, 217, 102, 0.25);
  --text: #fff5fb;
  --bubble-moon: rgba(255, 182, 220, 0.92);
  --bubble-user: rgba(120, 90, 200, 0.55);
  --glass: rgba(20, 12, 45, 0.65);
  --radius: 18px;
  --font: "M PLUS Rounded 1c", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--text);
}

body {
  position: relative;
  overflow-x: hidden;
  background: linear-gradient(165deg, var(--night-1) 0%, var(--night-2) 45%, #12082e 100%);
}

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

.sailor-bg__img {
  position: absolute;
  right: max(-4vw, -2rem);
  bottom: 0;
  height: min(100vh, 100%);
  width: auto;
  max-width: min(92vw, 520px);
  object-fit: contain;
  object-position: right bottom;
  filter: saturate(1.05);
}

.sailor-bg__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(10, 6, 24, 0.97) 0%,
    rgba(10, 6, 24, 0.82) 22%,
    rgba(10, 6, 24, 0.45) 42%,
    rgba(10, 6, 24, 0.12) 58%,
    transparent 72%
  );
  pointer-events: none;
}

@media (max-width: 480px) {
  .sailor-bg__img {
    max-width: 100vw;
    opacity: 0.92;
    right: -12vw;
  }
}

.stars {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1.5px 1.5px at 80% 20%, rgba(255, 217, 102, 0.4), transparent),
    radial-gradient(1px 1px at 40% 85%, rgba(255, 255, 255, 0.25), transparent);
  opacity: 0.7;
}

.app {
  position: relative;
  z-index: 2;
  max-width: 520px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 1.25rem 1rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: var(--glass);
  border: 1px solid var(--pink-soft);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 40px var(--gold-dim);
}

.header-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  flex-shrink: 0;
  overflow: hidden;
  border: 2px solid var(--pink-soft);
  box-shadow: 0 0 16px var(--gold-dim), 0 4px 12px rgba(0, 0, 0, 0.35);
}

.header-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
}

.header-text h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, var(--text), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0.2rem 0 0;
  font-size: 0.8rem;
  opacity: 0.85;
}

.chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  overflow-y: auto;
  padding: 0.5rem 0 1rem;
  max-height: calc(100vh - 220px);
}

.msg {
  display: flex;
  gap: 0.6rem;
  align-items: flex-end;
  animation: pop 0.35s ease;
}

@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg--user {
  flex-direction: row-reverse;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--pink-soft);
}

.msg--user .avatar {
  background: rgba(255, 110, 180, 0.25);
}

.bubble {
  max-width: 85%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  line-height: 1.55;
  font-size: 0.95rem;
}

.msg--moon .bubble {
  background: var(--bubble-moon);
  color: #3d1535;
  border-bottom-left-radius: 6px;
  box-shadow: 0 4px 20px rgba(255, 110, 180, 0.2);
}

.msg--user .bubble {
  background: var(--bubble-user);
  color: var(--text);
  border-bottom-right-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.bubble p {
  margin: 0;
}

.composer {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--glass);
  border: 1px solid var(--pink-soft);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
}

.composer input {
  flex: 1;
  border: none;
  border-radius: 12px;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  outline: none;
}

.composer input::placeholder {
  color: rgba(255, 245, 251, 0.45);
}

.composer input:focus {
  box-shadow: 0 0 0 2px var(--pink-soft);
}

.send {
  border: none;
  border-radius: 12px;
  padding: 0.75rem 1.1rem;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  background: linear-gradient(135deg, var(--pink), #d946a6);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 110, 180, 0.45);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.send:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(255, 110, 180, 0.55);
}

.send:active {
  transform: translateY(0);
}

.send:disabled,
.composer input:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.api-setup {
  margin-top: 0.75rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 110, 180, 0.22);
  background: rgba(12, 8, 28, 0.55);
  overflow: hidden;
}

.api-setup__summary {
  padding: 0.65rem 1rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 245, 251, 0.85);
  list-style: none;
}

.api-setup__summary::-webkit-details-marker {
  display: none;
}

.api-setup__summary::before {
  content: "▸ ";
  opacity: 0.6;
}

.api-setup[open] .api-setup__summary::before {
  content: "▾ ";
}

.api-setup__body {
  padding: 0 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.api-setup__label {
  font-size: 0.75rem;
  opacity: 0.8;
  margin-top: 0.25rem;
}

.api-setup__input {
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 0.55rem 0.75rem;
  font-family: inherit;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.api-setup__input::placeholder {
  color: rgba(255, 245, 251, 0.35);
}

.api-setup__input:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--pink-soft);
}

.api-setup__hint {
  margin: 0.25rem 0 0;
  font-size: 0.72rem;
  opacity: 0.75;
  min-height: 1.2em;
}

.api-setup__save {
  align-self: flex-start;
  margin-top: 0.35rem;
  border: 1px solid var(--pink-soft);
  border-radius: 10px;
  padding: 0.45rem 0.9rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  background: rgba(255, 110, 180, 0.2);
  color: var(--text);
}

.api-setup__save:hover {
  background: rgba(255, 110, 180, 0.32);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (min-width: 600px) {
  .app {
    padding-top: 2rem;
  }

  .header-text h1 {
    font-size: 1.4rem;
  }
}