:root {
  --bg: #081018;
  --bg-2: #101924;
  --text: #ebf0f5;
  --muted: rgba(235, 240, 245, 0.72);
  --muted-2: rgba(235, 240, 245, 0.42);
  --line: rgba(255, 255, 255, 0.08);
  --received: rgba(255, 255, 255, 0.08);
  --alive: linear-gradient(180deg, #2f6fff 0%, #2456da 100%);
  --after: linear-gradient(180deg, #5f8f7f 0%, #4d7768 100%);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(125, 168, 245, 0.34), transparent 36%),
    linear-gradient(180deg, #16283f 0%, #0c1521 34%, #060b11 62%, #03070b 100%);
  color: var(--text);
  font-family: "Inter", sans-serif;
  overflow-x: hidden;
}

.background {
  inset: 0;
  position: fixed;
  pointer-events: none;
}

.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.42;
}

.glow-1 {
  width: 22rem;
  height: 22rem;
  top: 8%;
  left: 5%;
  background: rgba(77, 112, 201, 0.25);
}

.glow-2 {
  width: 20rem;
  height: 20rem;
  bottom: 12%;
  right: 8%;
  background: rgba(102, 148, 130, 0.18);
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 3px 3px, 4px 4px;
  mix-blend-mode: soft-light;
}

.page-shell {
  width: min(100%, 58rem);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 5rem;
  position: relative;
  z-index: 1;
}

.intro {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto 2.5rem;
}

.eyebrow,
.deck,
.instruction,
.contact-status,
.date-chip,
.meta {
  color: var(--muted);
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1 {
  font-family: "EB Garamond", serif;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  line-height: 0.96;
  font-weight: 500;
  margin: 0.7rem 0 0.9rem;
}

.deck {
  max-width: 40rem;
  margin: 0 auto;
  line-height: 1.7;
  font-size: 1rem;
}

.instruction {
  margin-top: 1rem;
  font-size: 0.95rem;
}

.phone-frame {
  margin: 0 auto;
  width: min(100%, 34rem);
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: rgba(10, 16, 24, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  overflow: hidden;
}

.phone-topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem;
  align-items: center;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.phone-icons,
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

.action-glyph {
  display: inline-grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.04);
  line-height: 1;
}

.phone-icons span {
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.7);
  display: inline-block;
}

.contact-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  font-weight: 600;
  background: linear-gradient(180deg, rgba(255,255,255,0.2), rgba(255,255,255,0.08));
  color: white;
  flex: 0 0 auto;
}

.contact-name {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 600;
}

.contact-status {
  margin: 0.12rem 0 0;
  font-size: 0.8rem;
}

.thread {
  display: flex;
  flex-direction: column;
  gap: 0.62rem;
  padding: 0.9rem 0.85rem 1.1rem;
}

.date-chip {
  align-self: center;
  padding: 0.36rem 0.68rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.05);
  font-size: 0.72rem;
  margin: 0.75rem 0 0.35rem;
}

.message {
  max-width: 79%;
  padding: 0.82rem 0.92rem 0.66rem;
  border-radius: 1.2rem;
  position: relative;
}

.message.has-media {
  width: min(79%, 17rem);
}

.message p {
  margin: 0;
  line-height: 1.45;
}

.voice-note {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.7rem;
  min-width: 15rem;
  margin-bottom: 0.55rem;
}

.voice-play {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,0.16);
  font-size: 0.78rem;
}

.voice-wave {
  display: flex;
  align-items: center;
  gap: 0.18rem;
  min-height: 1.8rem;
}

.voice-wave span {
  width: 0.18rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.75);
  display: inline-block;
}

.voice-duration {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.78);
}

.image-card {
  position: relative;
  width: min(100%, 15.5rem);
  height: 12.5rem;
  border-radius: 1rem;
  overflow: hidden;
  margin: 0 0 0.55rem;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}

.image-media {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.image-card.station-night {
  background: #1b2638;
}

.image-card.rain-window {
  background: #3d4e66;
}

.image-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(0,0,0,0.4) 100%);
}

.image-caption {
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.7rem;
  z-index: 1;
  font-size: 0.74rem;
  color: rgba(255,255,255,0.92);
}

.message p + p {
  margin-top: 0.28rem;
}

.message.received {
  align-self: flex-start;
  background: var(--received);
  border-top-left-radius: 0.45rem;
}

.message.sent {
  align-self: flex-end;
  border-top-right-radius: 0.45rem;
}

.message.sent.alive {
  background: var(--alive);
}

.message.sent.after,
.message.sent.generated {
  background: var(--after);
}

.meta {
  display: inline-block;
  margin-top: 0.46rem;
  font-size: 0.7rem;
}

.composer {
  padding: 0.8rem 0.85rem 0.95rem;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
}

.composer-form {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.55rem;
  align-items: center;
}

.icon-button,
.send-button {
  appearance: none;
  border: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: inherit;
  cursor: pointer;
  color: white;
  transition: transform 150ms ease, opacity 150ms ease;
}

.icon-button {
  background: rgba(255,255,255,0.08);
}

.send-button {
  background: linear-gradient(180deg, #7cb09d, #5d8b79);
}

.icon-button:hover,
.send-button:hover {
  transform: translateY(-1px);
}

.icon-button:active,
.send-button:active {
  transform: translateY(0);
}

.composer-form textarea {
  width: 100%;
  resize: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0.8rem 0.95rem;
  font: inherit;
  min-height: 2.8rem;
  max-height: 7rem;
  line-height: 1.4;
}

.composer-form textarea:focus {
  outline: 1px solid rgba(147, 187, 171, 0.7);
  border-color: rgba(147, 187, 171, 0.7);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.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 (max-width: 640px) {
  .page-shell {
    padding: 2.2rem 0.8rem 3rem;
  }

  .deck {
    font-size: 1rem;
    line-height: 1.72;
  }

  .phone-frame {
    width: 100%;
    border-radius: 1.4rem;
  }

  .phone-topbar {
    padding: 0.8rem 0.85rem;
  }

  .thread {
    padding: 0.8rem 0.72rem 1rem;
  }

  .message {
    max-width: 88%;
    padding: 0.8rem 0.84rem 0.64rem;
  }

  .voice-note {
    min-width: 0;
  }

  .meta,
  .date-chip,
  .contact-status {
    font-size: 0.72rem;
  }

  .composer {
    padding: 0.72rem;
  }

  .composer-form {
    grid-template-columns: auto 1fr auto;
  }
}