/* ── SMOOTH DARK MODE TRANSITION ── */
body, .mesh-background, .ribbon-card, 
.bubble, .input-bar, .tagline, .glass-icon svg {
  transition: all 0.6s ease;
}

/* ── DARK MODE HEADING COLOR ── */
body.dark .logo-text {
  color: hsl(0 0% 90%);
}

body.dark .tagline {
  color: hsl(0 0% 75%);
}

/* ── DARK MODE ICONS ── */
body.dark .glass-icon svg {
  stroke: hsl(0 0% 85%);
}

/* ── DARK RIPPLE OVERLAY ── */
.dark-ripple {
  position: fixed;
  border-radius: 50%;
  background: hsl(260 30% 8% / 0.95);
  z-index: 9998;
  pointer-events: none;
  transition: transform 0.7s ease;
  transform: scale(0);
}
.dark-ripple.expand {
  transform: scale(50);
  transition: transform 0.7s ease;
}

.dark-ripple.collapse {
  transform: scale(0);
  transition: transform 1.8s ease-in-out;
}

/* ── DARK MODE BACKGROUND ── */
body.dark .mesh-background {
  background:
    radial-gradient(ellipse at 20% 50%, hsl(264 40% 25% / 0.9) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, hsl(280 40% 20% / 0.8) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, hsl(220 40% 20% / 0.8) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 30%, hsl(260 40% 22% / 0.7) 0%, transparent 60%),
    hsl(260 30% 12%);
}

body.dark .ribbon-card {
  background: hsl(260 30% 10% / 0.5);
}

body.dark .bubble.incoming {
  background: hsl(0 0% 100% / 0.08);
  color: hsl(0 0% 90%);
}

body.dark .bubble.outgoing {
  background: hsl(264 40% 30% / 0.4);
  color: hsl(0 0% 90%);
}

body.dark .input-bar {
  background: hsl(0 0% 100% / 0.08);
  border-color: hsl(0 0% 100% / 0.15);
}

body.dark .input-bar textarea {
  color: hsl(0 0% 90%);
}

body.dark .input-bar textarea::placeholder {
  color: hsl(0 0% 60%);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; font-weight: 700; }

:root {
  --lav: #9A8CBB;
  --peach: #FFDAB9;
  --blue: #8ECAE6;
  --dark: hsl(240 30% 15%);
  --mid: hsl(264 10% 45%);
  --font-head: 'Great Vibes', cursive;
  --font-body: 'Nunito', sans-serif;
  --card-r: 1.25rem;
}

body {
  font-family: var(--font-body);
  font-weight: 700;
  overflow: hidden;
  min-height: 100vh;
  color: var(--dark);
}

/* ── INTRO SCREEN ── */
#intro {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  background: linear-gradient(135deg, #b49fd4, #ffd4a8, #8ecae6);
}
.tagline{
  font-weight: 700;
}

.spark {
  position: absolute;
  width: 10px; height: 10px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 0 20px 8px rgba(255,255,255,0.9);
  animation: spark-pulse 0.9s ease-in-out forwards;
}
@keyframes spark-pulse {
  0%   { transform: scale(0); opacity: 0; }
  40%  { transform: scale(2); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.intro-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #b49fd4, #ffd4a8, #8ecae6);
  animation: overlay-fade 0.9s ease-out 1.85s forwards;
}
@keyframes overlay-fade {
  from { opacity: 1; }
  to   { opacity: 0; pointer-events: none; }
}

/* ── MAIN APP ── */
#app {
  opacity: 0;
  transition: opacity 0.6s ease;
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
}

/* ── MESH BACKGROUND ── */
@keyframes mesh-shift {
  0%,100% { background-position: 0% 50%; }
  25%     { background-position: 100% 0%; }
  50%     { background-position: 100% 100%; }
  75%     { background-position: 0% 100%; }
}
.mesh-background {
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at 20% 50%, hsl(264 25% 64% / 0.85) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, hsl(28 100% 86% / 0.8)  0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, hsl(197 65% 72% / 0.75) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 30%, hsl(264 25% 72% / 0.65) 0%, transparent 60%),
    hsl(264 20% 88%);
  background-size: 200% 200%;
  animation: mesh-shift 18s ease-in-out infinite;
}

/* ── HEADER ── */
header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem 2rem 0;
  position: relative;
  z-index: 10;
}

/* ── LOGO ── */
.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.3rem;
}
.logo-svg-wrap {
  position: relative;
  display: inline-block;
  background-color: transparent;
}
.logo-svg-wrap svg {
  height: clamp(2.8rem, 6vw, 4.8rem);
  width: auto;
  filter: drop-shadow(0 0 14px rgba(154,140,187,0.65));
}

@keyframes draw-stroke {
  to { stroke-dashoffset: 0; }
}
.draw-in {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: none; 
}
@keyframes type-name {
  from { transform: translateX(-100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

.logo-text-wrap{
    overflow:hidden;
    display: inline-block;
}
.logo-text {
  font-family: var(--font-head);
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  color: hsl(264 30% 30%);
  background-clip: text;
  filter: drop-shadow(0 0 14px rgba(154,140,187,0.65));
  animation: type-name 1.5s ease-out 0.3s both;
  display: inline-block;
}

@keyframes glow-follow {
  0%   { opacity: 0;  left: 5%;  top: 75%; }
  10%  { opacity: 1; }
  90%  { opacity: 1;  left: 60%; top: 60%; }
  100% { opacity: 0;  left: 64%; top: 60%; }
}
.glow-point {
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: white;
  pointer-events: none;
  box-shadow: 0 0 10px 3px #fff, 0 0 22px 6px rgba(220,200,255,0.8);
  animation: glow-follow 2.2s ease-out 0.3s forwards;
  opacity: 0;
}

@keyframes tagline-fade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 0.75; transform: translateY(0); }
}
.tagline {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: hsl(264 20% 30%);
  animation: tagline-fade 0.8s ease-out 2.8s both;
}

/* ── HEADER CONTROLS ── */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.glass-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.6rem;
  transition: background 0.2s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.glass-icon:hover { background: hsl(0 0% 100% / 0.12); }
.glass-icon:active { transform: scale(0.85); }
.glass-icon svg {
  width: 20px; height: 20px;
  stroke: hsl(264 20% 30% / 0.75);
  stroke-width: 1.5;
  fill: none;
}

/* ── MAIN STAGE ── */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.5rem 2rem;
}

/* ── RIBBON CARD ── */
@property --ribbon-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}
@keyframes ribbon-rotate {
  0%   { --ribbon-angle: 0deg; }
  100% { --ribbon-angle: 360deg; }
}

.ribbon-card {
  margin-top: 0.5rem;
  position: relative;
  width: 100%;
  max-width: 44rem;
  display: flex;
  flex-direction: column;
  height: min(68vh, 540px);
  background: hsl(0 0% 100% / 0.13);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border-radius: var(--card-r);
  box-shadow:
    0 20px 80px -20px hsl(264 25% 64% / 0.35),
    0 0 60px -20px hsl(264 25% 64% / 0.2);
}
.ribbon-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--card-r) + 2px);
  padding: 2px;
  background: conic-gradient(
    from var(--ribbon-angle),
    #fff,
    hsl(197 65% 72%),
    hsl(28 100% 86%),
    transparent,
    transparent,
    #fff
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: ribbon-rotate 4s linear infinite;
}
.card-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.5rem;
  border-radius: var(--card-r);
  overflow: hidden;
}

/* ── MESSAGES ── */
.messages {
  flex: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb { background: hsl(0 0% 100% / 0.25); border-radius: 4px; }

@keyframes msg-appear {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.msg-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  animation: msg-appear 0.3s ease forwards;
}
.msg-row.outgoing { flex-direction: row-reverse; }

.wave-icon {
  flex-shrink: 0;
  margin-top: 0.3rem;
  width: 14px; height: 14px;
  color: hsl(197 65% 55%);
}

.bubble {
  max-width: 72%;
  padding: 0.7rem 1rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--dark);
  font-weight: 600;
  word-wrap: break-word;
  word-break: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
}
.bubble.incoming {
  border-top-left-radius: 0.25rem;
  background: hsl(0 0% 100% / 0.4);
}
.bubble.outgoing {
  border-top-right-radius: 0.25rem;
  background: hsl(264 30% 55% / 0.22);
}

/* Typing dots */
.typing-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 0.4rem 0.2rem;
}
.typing-dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: hsl(264 25% 55%);
  animation: dot-bounce 1.2s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dot-bounce {
  0%,60%,100% { transform: translateY(0); opacity: 0.4; }
  30%          { transform: translateY(-6px); opacity: 1; }
}

/* ── INPUT BAR ── */
.input-bar {
  margin-top: 1rem;
  display: flex;
  align-items: flex-end;   /* CHANGED: center → flex-end so button stays at bottom */
  gap: 0.75rem;
  border-radius: 1.25rem;  /* CHANGED: pill → slightly rounded for textarea */
  padding: 0.55rem 0.55rem 0.55rem 1.25rem;
  background: hsl(0 0% 100% / 0.35);
  border: 1px solid hsl(0 0% 100% / 0.5);
}

/* CHANGED: input → textarea */
.input-bar textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.875rem;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--dark);
  resize: none;
  overflow: hidden;
  max-height: 120px;
  line-height: 1.5;
  padding: 0;
  /* vertically center single line text */
  padding-top: 0.35rem;
}
.input-bar textarea::placeholder { color: hsl(264 10% 50%); }

@keyframes send-pulse {
  0%,100% { box-shadow: 0 0 0 0 hsl(197 65% 72% / 0.45); }
  50%     { box-shadow: 0 0 0 8px hsl(197 65% 72% / 0); }
}
.action-btn {
  border: none;
  cursor: pointer;
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, hsl(264 25% 64%), hsl(28 100% 80%));
  animation: send-pulse 2s ease-in-out infinite;
  transition: filter 0.2s, transform 0.15s;
}
.action-btn:hover { filter: saturate(1.6); transform: scale(1.05); }
.action-btn svg {
  width: 15px; height: 15px;
  stroke: rgba(255,255,255,0.95);
  fill: none;
  stroke-width: 2;
}
.action-btn.listening {
  background: linear-gradient(135deg, #ff6b6b, #ff8e53);
  animation: send-pulse 0.7s ease-in-out infinite;
}

/* ── RESPONSIVE MOBILE ── */
@media (max-width: 768px) {
  .header-controls {
    position: static;
    flex-direction: row;
    gap: 0.4rem;
  }

  .glass-icon {
    background: none;
    backdrop-filter: none;
    border: none;
  }
}

/* ── DARK MODE ── */
body.dark .mesh-background {
  background:
    radial-gradient(ellipse at 20% 50%, hsl(264 40% 25% / 0.9) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, hsl(280 40% 20% / 0.8) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, hsl(220 40% 20% / 0.8) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 30%, hsl(260 40% 22% / 0.7) 0%, transparent 60%),
    hsl(260 30% 12%);
}

body.dark .ribbon-card {
  background: hsl(260 30% 10% / 0.5);
}

body.dark .bubble.incoming {
  background: hsl(0 0% 100% / 0.08);
  color: hsl(0 0% 90%);
}

body.dark .bubble.outgoing {
  background: hsl(264 40% 30% / 0.4);
  color: hsl(0 0% 90%);
}

body.dark .input-bar {
  background: hsl(0 0% 100% / 0.08);
  border-color: hsl(0 0% 100% / 0.15);
}

body.dark .input-bar textarea {
  color: hsl(0 0% 90%);
}

body.dark .input-bar textarea::placeholder {
  color: hsl(0 0% 60%);
}

body.dark .tagline {
  color: hsl(0 0% 70%);
}

body.dark .glass-icon svg {
  stroke: hsl(0 0% 80% / 0.8);
}

.sun-icon {
  animation: sun-spin 8s linear infinite;
  transform-origin: center;
}

@keyframes sun-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes app-reveal {
  from { 
    clip-path: circle(3% at 50% 50%);
    opacity: 1;
  }
  to { 
    clip-path: circle(150% at 50% 50%);
    opacity: 1;
  }
}

#app.revealed {
  animation: app-reveal 2.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}