/* =============================================
   SlothAI — Design System & Component Styles
   ============================================= */

/* ---- CSS Custom Properties ---- */
:root {
  /* Backgrounds */
  --bg-primary: #08080d;
  --bg-secondary: #0e0e16;
  --bg-tertiary: #14141f;
  --bg-glass: rgba(255, 255, 255, 0.022);
  --bg-glass-hover: rgba(255, 255, 255, 0.045);
  --bg-glass-active: rgba(255, 255, 255, 0.06);
  --bg-input: rgba(0, 0, 0, 0.35);

  /* Accents */
  --accent-amber: #f59e0b;
  --accent-amber-hover: #fbbf24;
  --accent-amber-muted: rgba(245, 158, 11, 0.12);
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-purple: #8b5cf6;
  --accent-purple-muted: rgba(139, 92, 246, 0.12);
  --accent-purple-glow: rgba(139, 92, 246, 0.2);
  --accent-green: #10b981;
  --accent-green-muted: rgba(16, 185, 129, 0.15);
  --accent-rose: #f43f5e;
  --accent-rose-muted: rgba(244, 63, 94, 0.15);

  /* Text */
  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #505068;
  --text-inverse: #08080d;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.055);
  --border-medium: rgba(255, 255, 255, 0.09);
  --border-focus: rgba(245, 158, 11, 0.5);

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;

  /* Layout */
  --sidebar-width: 280px;
  --header-height: 0px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-medium: 300ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow-amber: 0 0 30px var(--accent-amber-glow);
  --shadow-glow-purple: 0 0 30px var(--accent-purple-glow);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
}

a { color: var(--accent-amber); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  font-size: inherit;
}

::selection {
  background: var(--accent-amber-muted);
  color: var(--text-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---- Ambient Background ---- */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  will-change: transform;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-amber-glow), transparent 70%);
  top: -10%;
  right: -5%;
  animation: orbit1 25s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-purple-glow), transparent 70%);
  bottom: -10%;
  left: -5%;
  animation: orbit2 30s ease-in-out infinite;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12), transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: orbit3 20s ease-in-out infinite;
}

@keyframes orbit1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-60px, 40px) scale(1.1); }
  66% { transform: translate(30px, -30px) scale(0.95); }
}

@keyframes orbit2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(50px, -40px) scale(1.05); }
  66% { transform: translate(-40px, 30px) scale(1.1); }
}

@keyframes orbit3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

/* ---- Sidebar ---- */
#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-medium);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  font-size: 2rem;
  line-height: 1;
  animation: slothBob 4s ease-in-out infinite;
}

@keyframes slothBob {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-3px) rotate(-3deg); }
  75% { transform: translateY(2px) rotate(2deg); }
}

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

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-amber-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: left;
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--accent-amber);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
  transition: height var(--transition-medium);
}

.nav-item:hover {
  background: var(--bg-glass-hover);
}

.nav-item.active {
  background: var(--bg-glass-active);
}

.nav-item.active::before {
  height: 60%;
}

.nav-icon {
  font-size: 1.25rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.nav-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.nav-item.active .nav-label {
  color: var(--accent-amber);
}

.nav-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.model-selector {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.model-selector label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.model-selector select,
#model-select {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.model-selector select:focus,
#model-select:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* Connection Status */
.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  font-size: 0.75rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--transition-medium), box-shadow var(--transition-medium);
}

.status-dot.online {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green-muted);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.offline {
  background: var(--accent-rose);
  box-shadow: 0 0 8px var(--accent-rose-muted);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-text {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.settings-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.settings-btn:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

/* ---- Mobile Toggle ---- */
.mobile-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  box-shadow: var(--shadow-glow-amber);
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: transform var(--transition-fast);
}

.mobile-toggle:hover {
  transform: scale(1.1);
}

.mobile-toggle.active {
  transform: rotate(180deg);
}

/* ---- Main Content ---- */
#main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
}

/* ---- Setup Guide Banner ---- */
.setup-banner {
  display: none;
  max-width: 800px;
  width: 100%;
  margin: 32px auto 0;
  padding: 0 48px;
}

.setup-banner.visible {
  display: block;
  animation: fadeSlideUp 0.4s var(--ease-out);
}

.setup-banner-inner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(168, 85, 247, 0.05));
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.setup-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.setup-icon {
  font-size: 2.2rem;
  background: rgba(245, 158, 11, 0.15);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 158, 11, 0.3);
  flex-shrink: 0;
}

.setup-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.setup-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.setup-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.setup-step {
  display: flex;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  align-items: flex-start;
}

.step-number {
  background: var(--accent-amber);
  color: #111;
  font-weight: 800;
  font-size: 0.75rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-content {
  flex: 1;
  font-size: 0.85rem;
}

.step-content strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-size: 0.9rem;
}

.step-content p {
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-size: 0.8rem;
  line-height: 1.4;
}

.step-content a {
  color: var(--accent-amber);
  text-decoration: underline;
}

.setup-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  color: #a7f3d0;
  word-break: break-all;
  user-select: all;
}

.setup-retry-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent-amber);
  color: #111;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow-amber);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.setup-retry-btn:hover {
  background: var(--accent-amber-hover);
  transform: translateY(-1px);
}


/* ---- Tool Sections ---- */
.tool-section {
  display: none;
  flex-direction: column;
  padding: 40px 48px 60px;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  animation: fadeSlideUp 0.4s var(--ease-out);
}

.tool-section.active {
  display: flex;
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Tool Header */
.tool-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.tool-icon-lg {
  font-size: 2.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.tool-title {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.tool-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Tool Body */
.tool-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Input Groups */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-heading);
}

.optional-badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  background: var(--bg-glass);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin-left: 6px;
  font-weight: 500;
}

.input-row {
  display: flex;
  gap: 16px;
}

.input-group-half {
  flex: 1;
}

.tool-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 14px 16px;
  line-height: 1.6;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 60px;
}

.tool-input:focus {
  outline: none;
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 3px var(--accent-amber-muted);
}

.tool-input::placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.tool-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 12px 16px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.tool-select:focus {
  outline: none;
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 3px var(--accent-amber-muted);
}

.tool-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.char-count {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
  font-family: var(--font-mono);
}

/* ---- Generate Button ---- */
.generate-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  color: var(--text-inverse);
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-heading);
  letter-spacing: -0.01em;
  transition: all var(--transition-fast);
  overflow: hidden;
  box-shadow: var(--shadow-sm), 0 0 20px var(--accent-amber-muted);
  align-self: flex-start;
}

.generate-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, rgba(255, 255, 255, 0.15) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease-out);
}

.generate-btn:hover:not(:disabled)::before {
  transform: translateX(100%);
}

.generate-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), var(--shadow-glow-amber);
}

.generate-btn:active:not(:disabled) {
  transform: translateY(0);
}

.generate-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.generate-btn.loading .btn-content {
  display: none;
}

.btn-loading {
  display: none;
  align-items: center;
  gap: 8px;
}

.generate-btn.loading .btn-loading {
  display: flex;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0, 0, 0, 0.2);
  border-top-color: var(--text-inverse);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Output Area ---- */
.output-area {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  min-height: 120px;
  position: relative;
  transition: border-color var(--transition-medium);
}

.output-area.has-content {
  border-color: var(--border-medium);
}

.output-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  text-align: center;
}

.placeholder-icon {
  font-size: 2rem;
  opacity: 0.5;
  animation: slothBob 4s ease-in-out infinite;
}

.output-placeholder p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Generated content */
.output-content {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.output-content strong,
.output-content b {
  color: var(--accent-amber);
  font-weight: 600;
}

/* Streaming cursor */
.streaming-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent-amber);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink-cursor 0.8s step-end infinite;
}

@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Output toolbar (copy button, etc.) */
.output-toolbar {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.copy-btn.copied {
  color: var(--accent-green);
  border-color: var(--accent-green-muted);
}

/* ---- Settings Modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-medium);
  overflow: hidden;
}

.modal-overlay.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setting-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-heading);
}

.setting-input {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 12px 14px;
  transition: border-color var(--transition-fast);
  width: 100%;
}

.setting-input:focus {
  outline: none;
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 3px var(--accent-amber-muted);
}

select.setting-input {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
}

select.setting-input option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.setting-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Range slider */
.range-wrapper {
  padding: 4px 0;
}

.setting-range {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.setting-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-amber);
  box-shadow: 0 0 8px var(--accent-amber-muted);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.setting-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.setting-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-amber);
  border: none;
  cursor: pointer;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.range-labels span:nth-child(2) {
  color: var(--accent-amber);
  font-family: var(--font-mono);
  font-weight: 600;
}

.save-settings-btn {
  padding: 14px 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  color: var(--text-inverse);
  font-weight: 700;
  font-size: 0.9rem;
  font-family: var(--font-heading);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.save-settings-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), var(--shadow-glow-amber);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.modal-footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.modal-footer strong {
  color: var(--accent-green);
}

/* ---- Toast Notifications ---- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  color: var(--text-primary);
  animation: slideInToast 0.4s var(--ease-out), fadeOutToast 0.3s var(--ease-out) 3.7s forwards;
  max-width: 380px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.toast.success { border-color: var(--accent-green-muted); }
.toast.error { border-color: var(--accent-rose-muted); }
.toast.info { border-color: var(--accent-purple-muted); }

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOutToast {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(10px); }
}

/* ---- Error State in Output ---- */
.output-error {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--accent-rose-muted);
  border: 1px solid rgba(244, 63, 94, 0.2);
}

.output-error-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.output-error-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.output-error-text strong {
  display: block;
  margin-bottom: 4px;
  color: var(--accent-rose);
}

/* ---- Loading Shimmer ---- */
.shimmer-line {
  height: 14px;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg,
    var(--bg-glass) 0%,
    var(--bg-glass-hover) 50%,
    var(--bg-glass) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  margin-bottom: 10px;
}

.shimmer-line:last-child { width: 65%; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- Responsive Design ---- */
@media (max-width: 900px) {
  :root {
    --sidebar-width: 0px;
  }

  #sidebar {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: var(--shadow-lg);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  .mobile-toggle {
    display: flex;
  }

  .tool-section {
    padding: 24px 20px 80px;
  }

  .tool-title {
    font-size: 1.4rem;
  }

  .input-row {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 600px) {
  .tool-header {
    flex-direction: column;
    gap: 12px;
  }

  .tool-icon-lg {
    font-size: 2rem;
  }

  .generate-btn {
    width: 100%;
    justify-content: center;
  }

  .output-area {
    padding: 16px;
  }

  .toast-container {
    left: 16px;
    right: 16px;
    bottom: 80px;
  }

  .toast {
    max-width: none;
  }
}

/* ---- Utility Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* Print-friendly */
@media print {
  .ambient-bg, #sidebar, .mobile-toggle, .generate-btn,
  .modal-overlay, .toast-container, .settings-btn { display: none !important; }
  #main { margin-left: 0; }
  .output-area { border: 1px solid #ccc; }
}