:root {
  color-scheme: dark;
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Orbitron", "Rajdhani", var(--font-sans);
  --bg-gradient: radial-gradient(140% 140% at 10% 0%, #2f3a72 0%, rgba(9, 11, 25, 0) 50%),
    radial-gradient(120% 110% at 90% 10%, rgba(0, 214, 255, 0.28) 0%, rgba(3, 10, 26, 0) 52%),
    linear-gradient(155deg, #02030a 0%, #050817 32%, #070d21 58%, #030a18 100%);
  --surface-primary: rgba(8, 15, 34, 0.86);
  --surface-secondary: rgba(9, 19, 43, 0.78);
  --surface-tertiary: rgba(11, 23, 56, 0.74);
  --surface-highlight: rgba(0, 224, 255, 0.1);
  --surface-border: rgba(126, 197, 255, 0.32);
  --surface-border-strong: rgba(126, 197, 255, 0.56);
  --text-primary: #f4f8ff;
  --text-secondary: rgba(205, 218, 255, 0.82);
  --text-muted: rgba(173, 195, 237, 0.64);
  --text-inverse: #051126;
  --accent: #7df9ff;
  --accent-strong: #00e0ff;
  --accent-soft: rgba(0, 224, 255, 0.14);
  --warning: #ffb677;
  --success: #62f2ad;
  --shadow-xl: 0 40px 80px rgba(0, 0, 0, 0.48);
  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition-fast: 160ms ease;
  --transition-base: 220ms cubic-bezier(0.3, 0.54, 0.12, 1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 3vw, 3.5rem);
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: -20vh;
  pointer-events: none;
  background-repeat: no-repeat;
  opacity: 0.25;
  mix-blend-mode: screen;
  z-index: -1;
}

body::before {
  background-image: radial-gradient(circle at 20% 20%, rgba(125, 249, 255, 0.18) 0, transparent 50%),
    radial-gradient(circle at 80% 10%, rgba(131, 103, 255, 0.24) 0, transparent 52%);
}

body::after {
  background-image: radial-gradient(circle at 50% 90%, rgba(104, 255, 178, 0.22) 0, transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(0, 224, 255, 0.15) 0, transparent 55%);
  filter: blur(0.5px);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-primary);
  margin: 0;
}

p {
  margin: 0;
  line-height: 1.6;
}

a {
  color: inherit;
}

dt {
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

dd {
  margin: 0;
}

button,
input,
textarea {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
}

button,
input,
textarea,
summary {
  transition: all var(--transition-fast);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.chat-app {
  width: min(1280px, 96vw);
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr) 320px;
  gap: clamp(1.25rem, 2.8vw, 2rem);
  padding: clamp(1.25rem, 2.2vw, 2rem);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(6, 12, 28, 0.75), rgba(9, 16, 38, 0.65));
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(126, 197, 255, 0.2);
  backdrop-filter: blur(28px) saturate(120%);
}

.chat-sidebar,
.chat-main,
.chat-reference {
  border-radius: var(--radius-xl);
  border: 1px solid var(--surface-border);
  background: var(--surface-primary);
  padding: clamp(1.25rem, 2vw, 1.75rem);
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2vw, 1.5rem);
  position: relative;
  overflow: hidden;
}

.chat-sidebar::before,
.chat-main::before,
.chat-reference::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(0, 224, 255, 0.24), transparent 60%);
  opacity: 0.28;
  pointer-events: none;
}

.chat-sidebar > *,
.chat-main > *,
.chat-reference > * {
  position: relative;
  z-index: 1;
}

.chat-sidebar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(125, 249, 255, 0.06) 0%, transparent 40%);
  opacity: 0.8;
  pointer-events: none;
}

.chat-main {
  background: var(--surface-secondary);
  border-color: var(--surface-border-strong);
}

.chat-reference {
  background: var(--surface-tertiary);
}

.chat-sidebar__header {
  display: grid;
  gap: 0.65rem;
}

.chat-sidebar__header h1 {
  font-size: 1.1rem;
  letter-spacing: 0.28em;
}

.chat-sidebar__lede {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.chat-sidebar__section {
  display: grid;
  gap: 1rem;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.section-title h2 {
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  color: var(--text-muted);
}

.conversation-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.conversation-list li {
  padding: 0.95rem 1.05rem;
  background: linear-gradient(135deg, rgba(0, 224, 255, 0.1), rgba(0, 224, 255, 0.02));
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  display: grid;
  gap: 0.3rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.conversation-list li:hover {
  transform: translateY(-3px);
  border-color: rgba(126, 197, 255, 0.45);
  box-shadow: 0 16px 32px rgba(3, 12, 30, 0.36);
}

.conversation-list__title {
  font-weight: 600;
  letter-spacing: 0.05em;
}

.conversation-list__meta {
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.sidebar-stats {
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.sidebar-stats div {
  padding: 0.75rem 0.85rem;
  background: rgba(5, 12, 30, 0.55);
  border-radius: var(--radius-md);
  border: 1px solid rgba(126, 197, 255, 0.14);
  display: grid;
  gap: 0.2rem;
}

.sidebar-stats dt {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sidebar-stats dd {
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.sidebar-stats__note {
  display: block;
  color: var(--warning);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
}

.chat-main__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(126, 197, 255, 0.18);
}

.chat-main__header h2 {
  font-size: 0.95rem;
  letter-spacing: 0.26em;
}

.chat-main__subtitle {
  color: var(--text-secondary);
  max-width: 36ch;
  font-size: 0.95rem;
}

.messages {
  flex: 1;
  min-height: 320px;
  background: rgba(2, 8, 22, 0.65);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(126, 197, 255, 0.16);
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  overflow-y: auto;
  box-shadow: inset 0 0 0 1px rgba(0, 224, 255, 0.05);
}

.messages__empty {
  text-align: center;
  margin: auto;
  display: grid;
  gap: 0.75rem;
}

.messages__empty h3 {
  font-size: 1rem;
  letter-spacing: 0.24em;
}

.messages__empty p {
  color: var(--text-muted);
}

.message {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: flex-start;
}

.message__avatar {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 224, 255, 0.52), rgba(125, 249, 255, 0.32));
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-inverse);
  box-shadow: 0 8px 22px rgba(0, 224, 255, 0.32);
}

.message[data-role="user"] .message__avatar {
  background: linear-gradient(135deg, rgba(255, 187, 120, 0.5), rgba(255, 221, 120, 0.32));
  box-shadow: 0 8px 22px rgba(255, 187, 120, 0.28);
}

.message__bubble {
  background: rgba(9, 18, 38, 0.9);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(126, 197, 255, 0.18);
  padding: 1rem 1.1rem;
  display: grid;
  gap: 0.6rem;
  box-shadow: 0 18px 36px rgba(4, 12, 32, 0.38);
}

.message__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.message__content {
  line-height: 1.62;
  color: var(--text-secondary);
}

.message__content p + p {
  margin-top: 0.75rem;
}

.composer {
  display: grid;
  gap: 0.75rem;
  padding: 1.1rem;
  background: rgba(4, 10, 26, 0.78);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(126, 197, 255, 0.2);
  box-shadow: inset 0 0 0 1px rgba(125, 249, 255, 0.05);
}

.composer__label {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

.composer textarea {
  width: 100%;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: rgba(7, 16, 36, 0.85);
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.5;
  resize: vertical;
  min-height: 120px;
}

.composer textarea:hover,
.composer textarea:focus {
  border-color: rgba(126, 197, 255, 0.45);
  box-shadow: 0 0 0 1px rgba(0, 224, 255, 0.25);
}

.composer__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.slider {
  display: grid;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.slider span {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.68rem;
}

.slider input[type="range"] {
  appearance: none;
  width: 220px;
  max-width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(125, 249, 255, 0.18);
  position: relative;
  overflow: hidden;
}

.slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(125, 249, 255, 0.2);
}

.slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(125, 249, 255, 0.2);
}

.primary,
.secondary,
.ghost {
  cursor: pointer;
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.7rem;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.primary {
  background: linear-gradient(135deg, var(--accent-strong), #5cf4ff);
  color: var(--text-inverse);
  box-shadow: 0 16px 28px rgba(0, 224, 255, 0.35);
}

.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 36px rgba(0, 224, 255, 0.45);
}

.secondary {
  background: rgba(125, 249, 255, 0.14);
  border-color: rgba(125, 249, 255, 0.32);
  color: var(--text-primary);
}

.secondary:hover {
  background: rgba(125, 249, 255, 0.2);
  border-color: rgba(125, 249, 255, 0.48);
}

.ghost {
  background: rgba(5, 13, 30, 0.6);
  border-color: rgba(126, 197, 255, 0.22);
  color: var(--text-secondary);
}

.ghost:hover {
  border-color: rgba(126, 197, 255, 0.45);
  color: var(--accent);
}

.ghost--compact {
  padding: 0.45rem 1rem;
  font-size: 0.64rem;
}

.chat-reference__section {
  display: grid;
  gap: 0.75rem;
  background: rgba(4, 12, 30, 0.6);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(126, 197, 255, 0.12);
  padding: 1rem;
  box-shadow: inset 0 0 0 1px rgba(125, 249, 255, 0.05);
}

.chat-reference__subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.advanced-ledger {
  border-radius: var(--radius-md);
  background: rgba(5, 14, 32, 0.65);
  border: 1px solid rgba(126, 197, 255, 0.18);
  padding: 0.75rem 1rem;
  box-shadow: inset 0 0 0 1px rgba(125, 249, 255, 0.04);
}

.advanced-ledger summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
}

.advanced-ledger[open] summary {
  color: var(--accent);
}

.advanced-ledger__hint {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 0.6rem;
  margin-bottom: 0.9rem;
}

.seed-form {
  display: grid;
  gap: 0.8rem;
}

.seed-form label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.seed-form textarea,
.seed-form input[type="text"] {
  width: 100%;
  padding: 0.85rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: rgba(7, 18, 40, 0.78);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  resize: vertical;
}

.seed-form textarea:hover,
.seed-form textarea:focus,
.seed-form input[type="text"]:hover,
.seed-form input[type="text"]:focus {
  border-color: rgba(126, 197, 255, 0.42);
  box-shadow: 0 0 0 1px rgba(0, 224, 255, 0.18);
}

.metrics {
  display: grid;
  gap: 0.65rem;
}

.metrics div {
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-md);
  background: rgba(6, 15, 34, 0.58);
  border: 1px solid rgba(126, 197, 255, 0.16);
  display: grid;
  gap: 0.3rem;
}

.metrics dt {
  color: var(--text-muted);
  font-size: 0.7rem;
}

.metrics dd {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}

.seed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  max-height: 240px;
  overflow-y: auto;
}

.seed-list li {
  padding: 0.85rem 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(4, 12, 32, 0.7);
  border: 1px solid rgba(126, 197, 255, 0.16);
  display: grid;
  gap: 0.45rem;
}

.seed-list strong {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.seed-list span {
  color: var(--text-muted);
  font-size: 0.78rem;
}

#streak-alert {
  color: var(--warning);
  font-weight: 600;
}

#last-tended-card {
  position: relative;
}

#last-tended-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 182, 119, 0.25);
  opacity: 0;
  transition: opacity var(--transition-base);
}

#last-tended-card[data-active="true"]::after,
#last-tended-card:hover::after {
  opacity: 1;
}

/* Responsive Layout */
@media (max-width: 1180px) {
  .chat-app {
    grid-template-columns: minmax(0, 1fr);
  }

  .chat-sidebar,
  .chat-reference {
    order: -1;
  }
}

@media (max-width: 720px) {
  body {
    align-items: stretch;
    padding: 1rem;
  }

  .chat-app {
    padding: 1rem;
  }

  .chat-main__header {
    flex-direction: column;
  }

  .composer__footer {
    flex-direction: column;
    align-items: stretch;
  }

  .slider input[type="range"] {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}