/* ==========================================================================
   Rhena AI — Stylesheet
   A premium, dark-mode-first UI inspired by Apple / ChatGPT / Linear.
   ========================================================================== */

/* ----- Design tokens ----- */
:root {
  /* Surfaces */
  --bg: #08090d;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* Text */
  --text-primary: #f3f4f8;
  --text-secondary: rgba(243, 244, 248, 0.62);
  --text-tertiary: rgba(243, 244, 248, 0.4);

  /* Accents */
  --accent-blue: #6c8dff;
  --accent-purple: #b083ff;
  --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  --accent-gradient-soft: linear-gradient(135deg, rgba(108, 141, 255, 0.18), rgba(176, 131, 255, 0.18));
  --danger: #ff6b6b;

  /* Shadows */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.5);
  --glow-blue: 0 0 60px rgba(108, 141, 255, 0.35);
  --glow-purple: 0 0 60px rgba(176, 131, 255, 0.3);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Radii */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
}

/* ----- Reset ----- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ----- Ambient background glow ----- */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

.bg-glow--one {
  width: 520px;
  height: 520px;
  top: -180px;
  left: -140px;
  background: radial-gradient(circle, rgba(108, 141, 255, 0.5), transparent 70%);
  animation: drift-one 18s ease-in-out infinite;
}

.bg-glow--two {
  width: 560px;
  height: 560px;
  bottom: -220px;
  right: -160px;
  background: radial-gradient(circle, rgba(176, 131, 255, 0.45), transparent 70%);
  animation: drift-two 22s ease-in-out infinite;
}

@keyframes drift-one {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
}

@keyframes drift-two {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, -40px) scale(1.1); }
}

/* ----- App shell ----- */
.app {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ----- Header ----- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 4px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(20px);
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-badge {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface);
  backdrop-filter: blur(20px);
  transition: all 0.25s var(--ease-out);
}

.brand-badge:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--surface-strong);
  transform: translateY(-1px);
}

/* ----- Main layout ----- */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 44px;
  padding-top: 36px;
}

/* ----- Hero ----- */
.hero {
  text-align: center;
  max-width: 560px;
  animation: fade-in-up 0.8s var(--ease-out) both;
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(180deg, #ffffff, rgba(255, 255, 255, 0.75));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  margin-top: 14px;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ----- Microphone section ----- */
.mic-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  animation: fade-in-up 0.8s 0.1s var(--ease-out) both;
}

.mic-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-rings {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px solid rgba(108, 141, 255, 0.45);
  opacity: 0;
}

/* Rings animate only while the app has the .is-listening state */
.app.is-listening .ring-1 { animation: ring-pulse 2.2s ease-out infinite; }
.app.is-listening .ring-2 { animation: ring-pulse 2.2s ease-out 0.5s infinite; }
.app.is-listening .ring-3 { animation: ring-pulse 2.2s ease-out 1s infinite; }

@keyframes ring-pulse {
  0% { transform: scale(0.75); opacity: 0.55; border-color: rgba(108, 141, 255, 0.55); }
  100% { transform: scale(1.35); opacity: 0; border-color: rgba(176, 131, 255, 0.15); }
}

.mic-button {
  position: relative;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease-out), background 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
  z-index: 1;
}

.mic-button::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  padding: 1px;
  background: var(--accent-gradient);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s var(--ease-out);
}

.mic-button:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-strong), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.mic-button:active {
  transform: scale(0.96);
}

.mic-icon {
  transition: transform 0.3s var(--ease-out);
}

/* Listening state: gradient fill + glow + icon swap animation */
.app.is-listening .mic-button {
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: var(--glow-blue), var(--glow-purple), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  animation: mic-breathe 2.4s ease-in-out infinite;
}

.app.is-listening .mic-button::before {
  opacity: 1;
}

@keyframes mic-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.045); }
}

/* Finished/success pulse — brief confirmation state */
.app.is-finished .mic-button {
  border-color: rgba(108, 220, 156, 0.6);
  box-shadow: 0 0 40px rgba(108, 220, 156, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ----- Sound wave bars ----- */
.soundwave {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 28px;
  opacity: 0;
  transform: translateY(4px) scaleY(0.6);
  transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.app.is-listening .soundwave {
  opacity: 1;
  transform: translateY(0) scaleY(1);
}

.soundwave span {
  display: block;
  width: 3.5px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  height: 6px;
}

.app.is-listening .soundwave span {
  animation: wave-bounce 1.1s ease-in-out infinite;
}

.soundwave span:nth-child(1) { animation-delay: 0s; }
.soundwave span:nth-child(2) { animation-delay: 0.08s; }
.soundwave span:nth-child(3) { animation-delay: 0.16s; }
.soundwave span:nth-child(4) { animation-delay: 0.24s; }
.soundwave span:nth-child(5) { animation-delay: 0.32s; }
.soundwave span:nth-child(6) { animation-delay: 0.4s; }
.soundwave span:nth-child(7) { animation-delay: 0.32s; }
.soundwave span:nth-child(8) { animation-delay: 0.24s; }
.soundwave span:nth-child(9) { animation-delay: 0.16s; }
.soundwave span:nth-child(10) { animation-delay: 0.08s; }

@keyframes wave-bounce {
  0%, 100% { height: 6px; opacity: 0.6; }
  50% { height: 26px; opacity: 1; }
}

/* ----- Status label ----- */
.mic-status {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  transition: color 0.3s var(--ease-out);
}

.app.is-listening .mic-status {
  color: var(--text-primary);
}

.app.is-finished .mic-status {
  color: #6adc9c;
}

/* ----- Transcript card ----- */
.transcript-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-soft);
  animation: fade-in-up 0.8s 0.2s var(--ease-out) both;
  transition: border-color 0.3s var(--ease-out);
}

.transcript-card:focus-within {
  border-color: rgba(108, 141, 255, 0.4);
}

.transcript-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 8px;
}

.transcript-card-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.stats {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.stat strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.stat-divider {
  color: var(--text-tertiary);
}

.transcript-textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  color: var(--text-primary);
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  outline: none;
  transition: border-color 0.25s var(--ease-out), background 0.25s var(--ease-out);
}

.transcript-textarea::placeholder {
  color: var(--text-tertiary);
}

.transcript-textarea:focus {
  border-color: rgba(108, 141, 255, 0.5);
  background: rgba(0, 0, 0, 0.28);
}

/* ----- Action buttons ----- */
.transcript-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
}

.action-btn svg {
  flex-shrink: 0;
}

.action-btn--ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--surface-strong);
  transform: translateY(-1px);
}

.action-btn--ghost:active {
  transform: translateY(0) scale(0.97);
}

.action-btn--copied {
  color: #6adc9c !important;
  border-color: rgba(106, 220, 156, 0.4) !important;
}

/* ----- Toast ----- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translate(-50%, 20px);
  background: rgba(20, 20, 26, 0.9);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-size: 0.86rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-strong);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
  z-index: 50;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ----- Footer ----- */
.app-footer {
  text-align: center;
  padding-top: 32px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ----- Shared animations ----- */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ----- Responsive ----- */
@media (max-width: 560px) {
  .app {
    padding: 20px 16px 28px;
  }

  .app-main {
    gap: 34px;
    padding-top: 24px;
  }

  .mic-wrapper {
    width: 140px;
    height: 140px;
  }

  .mic-button {
    width: 92px;
    height: 92px;
  }

  .transcript-card {
    padding: 18px;
  }

  .transcript-textarea {
    min-height: 180px;
    font-size: 0.95rem;
  }

  .transcript-actions {
    flex-direction: column;
  }

  .action-btn {
    justify-content: center;
    width: 100%;
  }

  .brand-badge {
    display: none;
  }
}

@media (max-width: 360px) {
  .hero-title {
    font-size: 1.6rem;
  }
}