/* ── Chat page ── */
html, body {
  height: 100%;
  background: var(--purple-gradient);
  font-family: var(--font-display);
  color: var(--user-color);
}

.chat-container {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: clamp(var(--space-4), 5vw, 3rem);
}

/* Fuse the site-header into the chat card so it reads as one surface */
.chat-container > .site-header {
  margin-bottom: 0;
  border-bottom: 1px solid var(--glass-stroke-soft);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  box-shadow:
    0 1px 0 rgba(var(--white-rgb), 0.35) inset,
    0 -1px 0 rgba(var(--white-rgb), 0.08) inset;
}
.chat-container > .card {
  border-top: none;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

/* ── Card: glass shell ── */
.card {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  height: 90%;
  overflow: hidden;

  position: relative;
  background: var(--glass-tint);
  border: 1px solid var(--glass-stroke);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow);
  isolation: isolate;
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(var(--white-rgb),0.22) 0%, rgba(var(--white-rgb),0) 32%),
    radial-gradient(120% 70% at 50% -10%, rgba(var(--white-rgb),0.35), transparent 60%);
  mix-blend-mode: screen;
  z-index: 0;
}

.nav-pill-reset {
  font-family: inherit;
  cursor: pointer;
  color: var(--user-color);
  animation: fade-up var(--dur-med) var(--ease-out);
}
.nav-pill-reset svg { display: block; }
.nav-pill-reset:hover svg { transform: rotate(-60deg); transition: transform var(--dur-med) var(--ease-spring); }
.nav-pill-reset[hidden] { display: none; }

/* ── Messages area ── */
.card-body {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  padding: var(--space-5);
  overflow-y: auto;
}

.messages-box {
  overflow-y: auto;
  max-height: 100%;
  background: transparent;
  color: var(--user-color);
  position: relative;
}

.messages-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
  border: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.message {
  list-style: none;
  padding: var(--space-3) var(--space-4);
  background: rgba(var(--white-rgb),0.08);
  border: 1px solid var(--glass-stroke-soft);
  border-radius: 14px;
  max-width: 88%;
  animation: fade-up var(--dur-med) var(--ease-out) both;
}

.message-text {
  padding: 0;
  border-radius: 0;
}

/* ── Sender badges ── */
.message-content-AI,
.message-content-USER {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  line-height: 1.55;
}
.bubble-text {
  flex: 1 1 auto;
  min-width: 0;
  white-space: pre-line;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.message-content-AI::before,
.message-content-USER::before {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-top: 0.1rem;
  box-shadow:
    0 0 0 1px rgba(var(--white-rgb),0.4) inset,
    0 2px 6px rgba(var(--shadow-rgb),0.25);
}
.message-content-AI::before {
  content: "db";
  background: var(--accent-mint);
  color: var(--chat-bg);
}
.message-content-USER::before {
  content: "you";
  font-size: 9.5px;
  background: var(--user-color);
  color: var(--chat-bg);
}

.sent { align-self: flex-end; color: var(--user-color); }
.received { align-self: flex-start; color: var(--user-color); }
.received .message-content,
.received p { color: var(--user-color); }

/* Typing caret */
.typing-caret {
  display: inline-block;
  width: 0.5ch;
  margin-left: 1px;
  color: var(--accent-mint);
  animation: caret-blink 1s steps(2, end) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }

.thinking-text {
  animation: thinking-pulse 1.4s ease-in-out infinite;
}
@keyframes thinking-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ── Chat hero ── */
.chat-hero {
  padding: var(--space-2) var(--space-1) var(--space-5);
  max-width: 640px;
}
.eyebrow {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-mint);
  opacity: 0.9;
}
.hero-title {
  margin: 0 0 var(--space-3);
  font-size: clamp(var(--text-2xl), 6vw, var(--text-3xl));
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  background: linear-gradient(110deg, var(--color-white) 0%, var(--accent-mint) 60%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin: 0 0 var(--space-5);
  font-size: var(--text-md);
  line-height: 1.5;
  color: var(--text-bright);
  max-width: var(--content-measure);
}
.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--user-color);
  background: var(--glass-tint-soft);
  border: 1px solid var(--glass-stroke-soft);
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.95rem;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.chip:hover {
  background: var(--glass-tint);
  border-color: var(--glass-stroke);
  transform: translateY(-1px);
}
.chip:active { transform: translateY(0); }

/* ── Input bar ── */
.message-form {
  position: relative;
  z-index: 1;
  display: flex;
  padding: var(--space-3) 0 0;
  background: transparent;
  border: none;
}

.input-group {
  display: flex;
  width: 100%;
  gap: var(--space-2);
  border: none;
}

.message-input {
  flex: 1;
  min-height: 48px;
  padding: 0 var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--user-color);
  background: rgba(var(--white-rgb),0.08);
  border: 1px solid var(--glass-stroke-soft);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.message-input::placeholder { color: var(--text-muted); }
.message-input:focus {
  outline: none;
  background: rgba(var(--white-rgb),0.14);
  border-color: var(--accent-mint);
  color: var(--user-color);
  box-shadow: 0 0 0 3px rgba(var(--mint-rgb),0.22);
}

.btn-send {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  color: var(--chat-bg);
  background: var(--accent-mint);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  box-shadow:
    var(--accent-inset),
    var(--accent-glow);
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-med) var(--ease-out);
}
.btn-send:hover {
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 rgba(var(--white-rgb),0.7) inset,
    var(--accent-glow-hover);
}
.btn-send:active { transform: translateY(0); }
.btn-send-icon { transition: transform var(--dur-med) var(--ease-spring); }
.btn-send:hover .btn-send-icon { transform: translateX(2px); }

/* ── Footer ── */
.footer {
  text-align: center;
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--text-muted);
}
.footer a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--white-rgb),0.25);
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.footer a:hover { color: var(--accent-mint); border-color: var(--accent-mint); }

/* ── Mobile ── */
@media (max-width: 640px) {
  .card-header { padding: var(--space-3); }
  .nav-pill-quiet { margin-left: 0; }
  .hero-title { font-size: var(--text-2xl); }
  .btn-send-label { display: none; }
  .btn-send { padding: 0 var(--space-4); }
  .nav-pill-reset span { display: none; }
  .nav-pill-reset svg { width: 1rem; height: 1rem; }

}