/* ---------------------------------------------------
   BASE + THEME
--------------------------------------------------- */
:root {
  --bg-gradient: radial-gradient(circle at top, #1f2937 0, #020617 55%, #000000 100%);
  --accent-1: #8b5cf6;
  --accent-2: #c084fc;
  --accent-3: #a855f7;
  --accent-soft: rgba(139, 92, 246, 0.12);
  --accent-strong: rgba(139, 92, 246, 0.32);

  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --card-bg: rgba(15, 23, 42, 0.9);
  --border-soft: rgba(148, 163, 184, 0.35);
  --chip-bg: rgba(15, 23, 42, 0.9);

  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.6);
}

/* Reset-ish */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Inter", "Segoe UI", sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
}

/* ---------------------------------------------------
   LAYOUT
--------------------------------------------------- */

.app-shell {
  max-width: 1240px;
  margin: 18px auto 26px;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Topbar ------------------------------------------------ */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  background: linear-gradient(
      120deg,
      rgba(15, 23, 42, 0.9),
      rgba(15, 23, 42, 0.96)
    ),
    radial-gradient(circle at top left, rgba(236, 72, 153, 0.24), transparent 55%),
    radial-gradient(circle at top right, rgba(129, 140, 248, 0.26), transparent 55%);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.35);
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: conic-gradient(
    from 180deg,
    #4c1d95,
    #7c3aed,
    #22d3ee,
    #ec4899,
    #8b5cf6
  );
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.7);
}

.brand-logo span {
  font-weight: 700;
  color: #f9fafb;
  text-shadow: 0 1px 3px rgba(15, 23, 42, 0.8);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 18px;
  font-weight: 600;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: #0b1120;
}

.user-name {
  font-size: 13px;
  color: var(--text-main);
}

/* Main grid ------------------------------------------------ */

.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1.1fr);
  gap: 16px;
}

/* Panels ------------------------------------------------ */

.panel {
  border-radius: var(--radius-lg);
  background: linear-gradient(
      145deg,
      rgba(15, 23, 42, 0.95),
      rgba(15, 23, 42, 0.98)
    );
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Chat panel */

.chat-panel {
  min-height: 480px;
}

.chat-window {
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
}

/* Scrollbar */
.chat-window::-webkit-scrollbar,
.template-list::-webkit-scrollbar {
  width: 6px;
}
.chat-window::-webkit-scrollbar-thumb,
.template-list::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.5);
  border-radius: 999px;
}

/* Messages */

.msg {
  max-width: 92%;
  padding: 10px 12px;
  border-radius: 14px;
  margin: 6px 0;
  font-size: 13px;
  line-height: 1.4;
  position: relative;
}

.msg.bot {
  align-self: flex-start;
  background: radial-gradient(circle at top left, rgba(139, 92, 246, 0.26), transparent 60%),
    rgba(15, 23, 42, 0.9);
  border: 1px solid var(--accent-strong);
}

.msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, #16a34a, #4ade80);
  color: #022c22;
  font-weight: 500;
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.4);
}

.msg-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.msg-body {
  font-size: 13px;
}

.msg-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* Quick chips row */

.quick-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

/* Buttons + chips */

.btn,
.chip {
  border: none;
  outline: none;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.chip {
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(129, 140, 248, 0.7);
  color: #e5e7eb;
  backdrop-filter: blur(10px);
}

.chip:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 14px rgba(139, 92, 246, 0.7);
  background: radial-gradient(circle at top, rgba(129, 140, 248, 0.45), rgba(15, 23, 42, 0.96));
}

/* Chat input row */

.chat-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.chat-input-row input[type="text"] {
  flex: 1;
  padding: 9px 11px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  font-size: 13px;
}

.chat-input-row input::placeholder {
  color: rgba(148, 163, 184, 0.9);
}

.chat-tip {
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-muted);
}

/* Button styles */

.btn-primary {
  padding: 8px 14px;
  border-radius: 999px;
  color: #f9fafb;
  background-image: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 0 18px rgba(168, 85, 247, 0.8);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(168, 85, 247, 0.95);
}

.btn-secondary {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(129, 140, 248, 0.7);
  color: var(--text-main);
}

.btn-secondary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 18px rgba(129, 140, 248, 0.7);
}

.btn-ghost {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-muted);
}

.btn-ghost:hover {
  border-color: rgba(148, 163, 184, 0.9);
  color: #e5e7eb;
}

/* Disabled state */
button:disabled {
  opacity: 0.4;
  cursor: default;
  box-shadow: none !important;
  transform: none !important;
}

/* Preview panel ------------------------------------------------ */

.preview-panel {
  min-height: 480px;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.panel-title {
  font-size: 14px;
  font-weight: 600;
}

.panel-subtitle {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
}

.template-list {
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Template card */

.template-card {
  border-radius: var(--radius-md);
  background: radial-gradient(circle at top left, rgba(129, 140, 248, 0.28), transparent 65%),
    rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(129, 140, 248, 0.6);
  padding: 8px 10px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.7);
  font-size: 13px;
}

.template-card .small {
  font-size: 12px;
  color: var(--text-muted);
}

.template-card hr {
  border: none;
  height: 1px;
  background: rgba(148, 163, 184, 0.5);
  margin: 6px 0;
}

/* Empty state */

.empty-state {
  padding: 18px 12px;
  text-align: center;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at top, rgba(148, 163, 184, 0.18), transparent 60%),
    rgba(15, 23, 42, 0.9);
}

.empty-icon {
  font-size: 20px;
  margin-bottom: 4px;
}
.empty-title {
  font-size: 13px;
  font-weight: 500;
}
.empty-text {
  font-size: 12px;
  color: var(--text-muted);
}

/* Actions row */

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

/* Footer ------------------------------------------------ */

.app-footer {
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

.app-footer code {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 10px;
  border: 1px solid rgba(148, 163, 184, 0.7);
}

/* Responsive ------------------------------------------------ */

@media (max-width: 980px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  .preview-panel {
    order: 2;
  }
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .user-pill {
    align-self: flex-end;
  }
  .chat-input-row {
    flex-wrap: wrap;
  }
}