/* ─── Soft UI Design System ───────────────────────────────────────────────── */
:root {
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  /* Canvas & Containers */
  --bg-canvas: #FAFBFD; /* Light desaturated neutral background */
  --bg-card: #FFFFFF; /* Pure white card base */
  --bg-input: #F8FAFc; /* Slate-50 soft inputs */
  
  /* Borders & Shadows */
  --border-soft: rgba(0, 0, 0, 0.04);
  --border-input: #E2E8F0; /* Slate-200 */
  --shadow-micro: 0 4px 20px -2px rgba(0, 0, 0, 0.03); /* Soft micro-shadow */
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 1px 3px 0 rgba(0, 0, 0, 0.01);
  
  /* Brand Accents */
  --color-primary: #1A73E8; /* Vibrant Google Blue */
  --color-primary-hover: #1557b0;
  --color-primary-glow: rgba(26, 115, 232, 0.15);
  --color-secondary: #E91E63; /* Pink accent */
  
  /* Text colors */
  --color-text-title: #0F172A; /* Slate-900 */
  --color-text-main: #334155;  /* Slate-700 */
  --color-text-muted: #64748B; /* Slate-500 */
  
  /* Semantic Indicators (Desaturated, soft tones) */
  --bg-green-soft: rgba(16, 185, 129, 0.08);
  --color-green: #10B981;
  --border-green: rgba(16, 185, 129, 0.15);
  
  --bg-red-soft: rgba(239, 68, 68, 0.08);
  --color-red: #EF4444;
  --border-red: rgba(239, 68, 68, 0.15);
  
  --bg-yellow-soft: rgba(245, 158, 11, 0.08);
  --color-yellow: #F59E0B;
  --border-yellow: rgba(245, 158, 11, 0.15);
  
  /* Geometry & Radius */
  --radius-xl: 20px;    /* Heavy rounded corners */
  --radius-lg: 16px;    /* Moderately rounded */
  --radius-md: 12px;    /* Base rounded */
  
  /* Internal Spacing */
  --pad-card: 24px;     /* Generous card padding (p-6) */
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-canvas);
  color: var(--color-text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
}

/* Main Container */
.app-container {
  width: 95vw;
  max-width: 1400px;
  height: 90vh;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 10px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-micro);
}

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

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.logo h1 {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text-title);
  letter-spacing: -0.5px;
}

.logo h1 span {
  color: var(--color-primary);
}

/* Status Indicator */
.status {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}

.status::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
}

.status.disconnected {
  background-color: var(--bg-red-soft);
  color: var(--color-red);
  border: 1px solid var(--border-red);
}

.status.connected {
  background-color: var(--bg-green-soft);
  color: var(--color-green);
  border: 1px solid var(--border-green);
}

.status.connecting {
  background-color: var(--bg-yellow-soft);
  color: var(--color-yellow);
  border: 1px solid var(--border-yellow);
  animation: pulse-border 1.5s infinite ease-in-out;
}

/* Main Grid Layout */
.main-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  flex: 1;
  min-height: 0;
}

/* Card Geometry */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-micro);
  padding: var(--pad-card);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
}

.controls-panel::-webkit-scrollbar {
  display: none;
}

.controls-panel h2 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-title);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

/* Form layout */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* API Key Input styles */
.input-with-action {
  display: flex;
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  overflow: hidden;
  align-items: center;
  transition: border-color 0.2s ease;
}

.input-with-action:focus-within {
  border-color: var(--color-primary);
  background-color: var(--bg-card);
}

.input-with-action input {
  flex: 1;
  padding: 12px 14px;
  background: none;
  border: none;
  color: var(--color-text-title);
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
}

.btn-icon-only {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.btn-icon-only:hover {
  color: var(--color-text-title);
}

.btn-icon-only i {
  width: 16px;
  height: 16px;
}

/* Buttons in Soft UI Style */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
}

.primary-btn {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.primary-btn:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  box-shadow: 0 6px 16px var(--color-primary-glow);
  transform: translateY(-1px);
}

.primary-btn:disabled {
  background-color: var(--border-input);
  color: var(--color-text-muted);
  box-shadow: none;
  cursor: not-allowed;
}

.secondary-btn {
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  color: var(--color-text-main);
}

.secondary-btn:hover {
  background-color: #ECEFF1;
  border-color: #CFD8DC;
}

.small-btn {
  padding: 8px 14px !important;
  font-size: 12px !important;
  border-radius: 8px;
  width: fit-content;
}

/* Floating Connect Button Option */
#connectBtn {
  border-radius: var(--radius-lg);
  padding: 14px 24px;
  font-size: 15px;
  margin-top: 10px;
}

#connectBtn.connected-state {
  background-color: var(--color-red);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

#connectBtn.connected-state:hover {
  background-color: #d32f2f;
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.3);
}

.helper-text {
  font-size: 11px;
  color: var(--color-green);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: opacity 0.3s ease;
}

.helper-text.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Dropdown selector wrap */
.select-wrapper {
  position: relative;
  width: 100%;
}

.select-wrapper select {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  color: var(--color-text-main);
  font-family: var(--font-main);
  font-size: 14px;
  cursor: pointer;
  appearance: none;
  outline: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.select-wrapper select:focus {
  border-color: var(--color-primary);
  background-color: var(--bg-card);
}

.select-arrow {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  width: 16px;
  height: 16px;
}

/* Chat Workspace */
.chat-workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 0;
}

.chat-history-card {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 16px;
}

.card-header h2 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-title);
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-text {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}

.btn-text:hover {
  color: var(--color-red);
}

/* Scrollable message logs */
.chat-history {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-right: 8px;
}

.chat-history::-webkit-scrollbar {
  width: 6px;
}

.chat-history::-webkit-scrollbar-track {
  background: transparent;
}

.chat-history::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}

/* Empty State info */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--color-text-muted);
  gap: 16px;
  text-align: center;
  padding: 40px;
}

.empty-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  opacity: 0.4;
}

.empty-state p {
  font-size: 14px;
  max-width: 320px;
  line-height: 1.5;
}

/* Chat Turn Bubbles (Soft UI Hierarchy) */
.chat-turn {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 22px;
  border-radius: var(--radius-lg);
  animation: fade-in 0.3s ease-out;
  border: 1px solid var(--border-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-turn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.turn-user {
  align-self: flex-end;
  background-color: rgba(26, 115, 232, 0.03); /* Faint tint for user prompt */
  border-color: rgba(26, 115, 232, 0.1);
  width: 85%;
}

.turn-gemini {
  align-self: flex-start;
  background-color: var(--bg-card);
  box-shadow: var(--shadow-micro);
  width: 90%;
}

.turn-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
  padding-bottom: 8px;
}

.turn-role {
  display: flex;
  align-items: center;
  gap: 6px;
}

.turn-user .turn-role {
  color: var(--color-primary);
}

.turn-gemini .turn-role {
  color: var(--color-secondary);
}

/* Floating Delete button inside card hover */
.btn-delete-item {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.chat-turn:hover .btn-delete-item {
  opacity: 1;
}

.btn-delete-item:hover {
  color: var(--color-red);
}

.btn-delete-item i {
  width: 14px;
  height: 14px;
}

.turn-content {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-main);
  white-space: pre-wrap;
}

.turn-content.font-bold {
  font-weight: 500;
  color: var(--color-text-title);
}

/* Playback & Download interface inside turn card */
.audio-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-soft);
  padding: 8px 12px;
  border-radius: var(--radius-md);
}

.play-pause-btn {
  background-color: var(--color-primary);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease;
  box-shadow: 0 2px 8px var(--color-primary-glow);
}

.play-pause-btn:hover {
  transform: scale(1.05);
  background-color: var(--color-primary-hover);
}

.audio-progress-bar {
  flex: 1;
  height: 4px;
  background-color: var(--border-input);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.audio-progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background-color: var(--color-primary);
  width: 0%;
}

.audio-duration {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: monospace;
  min-width: 65px;
  text-align: center;
}

.download-audio-btn {
  background-color: #FFFFFF;
  border: 1px solid var(--border-input);
  color: var(--color-text-main);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.download-audio-btn:hover {
  background-color: var(--bg-input);
  border-color: #CFD8DC;
  transform: translateY(-0.5px);
}

.download-audio-btn i {
  width: 13px;
  height: 13px;
}

/* Chat Prompt Input card */
.input-card {
  padding: 16px;
  gap: 12px;
  border-radius: var(--radius-lg);
}

.input-container {
  display: flex;
  gap: 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  padding: 10px;
  transition: all 0.2s ease;
}

.input-container:focus-within {
  border-color: var(--color-primary);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.input-container textarea {
  flex: 1;
  background: none;
  border: none;
  resize: none;
  outline: none;
  font-family: var(--font-main);
  color: var(--color-text-title);
  font-size: 14px;
  line-height: 1.5;
  height: 54px;
  padding: 6px;
}

.input-container textarea::placeholder {
  color: var(--color-text-muted);
}

.send-btn {
  padding: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  align-self: flex-end;
}

.send-btn i {
  width: 18px;
  height: 18px;
}

.input-footer {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Animations */
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-border {
  0% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.3);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(245, 158, 11, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
}

/* Responsive Scaling */
@media (max-width: 900px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  .app-container {
    height: auto;
  }
  body {
    overflow-y: auto;
    padding: 20px 0;
  }
}