/* ============================================
   style.css — Prompt Architect
   Apple-inspired design system
   ============================================ */

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root, [data-theme="light"] {
  /* --- Type Scale (fluid) --- */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* --- Spacing (4px grid) --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* --- Surfaces (Apple Light) --- */
  --color-bg:             #f5f5f7;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafafa;
  --color-surface-offset: #f0f0f2;
  --color-surface-offset-2: #eaeaec;
  --color-surface-dynamic: #e5e5ea;
  --color-divider:        #e5e5ea;
  --color-border:         #d1d1d6;

  /* --- Text (Apple) --- */
  --color-text:           #1d1d1f;
  --color-text-muted:     #86868b;
  --color-text-faint:     #aeaeb2;
  --color-text-inverse:   #ffffff;

  /* --- Primary Accent (Apple Blue) --- */
  --color-primary:        #0071e3;
  --color-primary-hover:  #0077ed;
  --color-primary-active: #005bb5;
  --color-primary-highlight: #e8f0fe;

  /* --- Semantic Colors --- */
  --color-error:          #ff3b30;
  --color-error-hover:    #e0342b;
  --color-error-highlight: #fff0ef;
  --color-success:        #34c759;
  --color-success-hover:  #2db84e;
  --color-success-highlight: #edf9f0;
  --color-warning:        #ff9500;
  --color-warning-highlight: #fff7ec;

  /* --- Radius --- */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-enter: 300ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-exit: 200ms cubic-bezier(0.4, 0, 1, 1);

  /* --- Shadows --- */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 20px rgba(0,0,0,0.06);

  /* --- Content widths --- */
  --content-narrow: 640px;
  --content-default: 880px;
  --content-wide: 1200px;

  /* --- Fonts --- */
  --font-display: 'SF Pro Display', 'Inter', -apple-system, system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, system-ui, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Courier New', monospace;

  /* --- Header --- */
  --header-bg: rgba(245, 245, 247, 0.72);
  --header-blur: blur(20px) saturate(180%);
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  --color-bg:             #000000;
  --color-surface:        #1c1c1e;
  --color-surface-2:      #2c2c2e;
  --color-surface-offset: #1c1c1e;
  --color-surface-offset-2: #2c2c2e;
  --color-surface-dynamic: #3a3a3c;
  --color-divider:        #38383a;
  --color-border:         #48484a;
  --color-text:           #f5f5f7;
  --color-text-muted:     #98989d;
  --color-text-faint:     #636366;
  --color-text-inverse:   #ffffff;
  --color-primary:        #0a84ff;
  --color-primary-hover:  #409cff;
  --color-primary-active: #0066cc;
  --color-primary-highlight: #0a84ff1a;
  --color-error:          #ff453a;
  --color-error-hover:    #ff6961;
  --color-error-highlight: rgba(255,69,58,0.12);
  --color-success:        #30d158;
  --color-success-hover:  #4fdc72;
  --color-success-highlight: rgba(48,209,88,0.12);
  --color-warning:        #ff9f0a;
  --color-warning-highlight: rgba(255,159,10,0.12);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.6);
  --header-bg: rgba(0, 0, 0, 0.72);
  --header-blur: blur(20px) saturate(180%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #000000;
    --color-surface: #1c1c1e;
    --color-surface-2: #2c2c2e;
    --color-surface-offset: #1c1c1e;
    --color-surface-offset-2: #2c2c2e;
    --color-surface-dynamic: #3a3a3c;
    --color-divider: #38383a;
    --color-border: #48484a;
    --color-text: #f5f5f7;
    --color-text-muted: #98989d;
    --color-text-faint: #636366;
    --color-text-inverse: #ffffff;
    --color-primary: #0a84ff;
    --color-primary-hover: #409cff;
    --color-primary-active: #0066cc;
    --color-primary-highlight: #0a84ff1a;
    --color-error: #ff453a;
    --color-error-hover: #ff6961;
    --color-error-highlight: rgba(255,69,58,0.12);
    --color-success: #30d158;
    --color-success-hover: #4fdc72;
    --color-success-highlight: rgba(48,209,88,0.12);
    --color-warning: #ff9f0a;
    --color-warning-highlight: rgba(255,159,10,0.12);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.6);
    --header-bg: rgba(0, 0, 0, 0.72);
    --header-blur: blur(20px) saturate(180%);
  }
}

/* ============================================
   PAGE LAYOUT
   ============================================ */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ============================================
   HEADER / NAV — Frosted Glass
   ============================================ */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: var(--header-blur);
  -webkit-backdrop-filter: var(--header-blur);
  border-bottom: 1px solid var(--color-divider);
  transition: background 300ms ease;
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-rows: auto auto;
  gap: 0;
}

.header-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.header-stepper {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-3) 0;
  justify-content: center;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg { color: var(--color-text-inverse); }

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
}

/* Header controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Demo mode toggle */
.demo-toggle-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.demo-toggle-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  user-select: none;
}

.toggle-switch {
  position: relative;
  width: 40px;
  height: 24px;
  cursor: pointer;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--color-surface-dynamic);
  border-radius: var(--radius-full);
  transition: background var(--transition-interactive);
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: #ffffff;
  border-radius: var(--radius-full);
  transition: transform var(--transition-interactive);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toggle-switch input:checked + .toggle-track {
  background: var(--color-primary);
}
.toggle-switch input:checked + .toggle-track .toggle-thumb {
  transform: translateX(16px);
}

/* Theme button */
.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.btn-icon:hover {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
}
.btn-icon:active {
  background: var(--color-surface-offset-2);
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-16) var(--space-6) var(--space-12);
}

/* ============================================
   PROGRESS STEPPER
   ============================================ */
.stepper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
}

.stepper-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stepper-dot {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-faint);
  transition: all var(--transition-interactive);
  flex-shrink: 0;
}

.stepper-dot.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.stepper-dot.completed {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.stepper-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  white-space: nowrap;
  transition: color var(--transition-interactive);
}

.stepper-item.active .stepper-label { color: var(--color-text); }
.stepper-item.completed .stepper-label { color: var(--color-primary); }

.stepper-line {
  height: 1px;
  width: var(--space-6);
  background: var(--color-divider);
  flex-shrink: 0;
  transition: background var(--transition-interactive);
}
.stepper-line.completed { background: var(--color-primary); }

/* ============================================
   WIZARD STEPS
   ============================================ */
.step-container {
  width: 100%;
  max-width: var(--content-default);
  position: relative;
}

.step-panel {
  display: none;
  opacity: 0;
}

.step-panel.active {
  display: block;
  animation: stepEnter var(--transition-enter) forwards;
}

.step-panel.exiting {
  animation: stepExit var(--transition-exit) forwards;
}

@keyframes stepEnter {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes stepExit {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-6px); }
}

/* ============================================
   STEP HEADERS
   ============================================ */
.step-header {
  text-align: center;
  margin-bottom: var(--space-10);
  position: relative;
  z-index: 0;
}

.step-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
}

.step-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.step-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin: 0 auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* Subtle gradient glow — removed to prevent heading overlap issues */

/* ============================================
   FORM CARD — Step 1
   ============================================ */
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-3xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-interactive);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.field-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.field-label-required {
  color: var(--color-error);
  font-size: var(--text-xs);
}

.field-hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.input-base {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1.5px solid var(--color-divider);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: var(--font-body);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), background var(--transition-interactive);
  width: 100%;
}

.input-base:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.12);
  background: var(--color-surface);
}

[data-theme="dark"] .input-base:focus {
  box-shadow: 0 0 0 3px rgba(10,132,255,0.2);
}

.input-base::placeholder { color: var(--color-text-faint); }

textarea.input-base {
  resize: vertical;
  min-height: 160px;
  line-height: 1.65;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.04);
}

.optional-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
}
.form-divider-line { flex: 1; height: 1px; background: var(--color-divider); }
.form-divider-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
  width: 100%;
  letter-spacing: -0.01em;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,113,227,0.25);
}
.btn-primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background var(--transition-interactive), border-color var(--transition-interactive), transform var(--transition-interactive);
}
.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-faint);
  transform: translateY(-1px);
}
.btn-secondary:active {
  background: var(--color-surface-dynamic);
  transform: translateY(0);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.btn-ghost:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* ============================================
   STEP 2 — LOADING
   ============================================ */
.loading-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
  gap: var(--space-8);
}

.loading-spinner {
  width: 44px;
  height: 44px;
  position: relative;
}

.spinner-ring {
  width: 44px;
  height: 44px;
  border: 2.5px solid var(--color-divider);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.85s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

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

.loading-status {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.loading-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: left;
  width: 280px;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
}

.loading-step.current { color: var(--color-text-muted); }
.loading-step.done { color: var(--color-success); }

.loading-step-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-surface-dynamic);
  flex-shrink: 0;
  transition: background var(--transition-interactive);
}
.loading-step.current .loading-step-dot { background: var(--color-primary); }
.loading-step.done .loading-step-dot { background: var(--color-success); }

/* ============================================
   STEP 3 — CLARIFICATION QUESTIONS
   ============================================ */
.questions-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.question-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-3xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(6px);
  animation: questionEnter var(--transition-enter) forwards;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.question-card:hover {
  box-shadow: var(--shadow-md);
}

@keyframes questionEnter {
  to { opacity: 1; transform: translateY(0); }
}

.question-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.question-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.question-number {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
}

.question-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.question-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.option-btn {
  padding: var(--space-4);
  min-height: 48px;
  background: var(--color-bg);
  border: 1.5px solid var(--color-divider);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--color-text-muted);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-interactive);
  line-height: 1.5;
  position: relative;
}

.option-btn:hover {
  background: var(--color-surface);
  border-color: var(--color-text-faint);
  color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.option-btn.selected {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

[data-theme="dark"] .option-btn.selected {
  background: rgba(10,132,255,0.12);
  color: var(--color-primary);
}

.option-btn:active { transform: translateY(0); }

.question-custom-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.question-custom-label::before,
.question-custom-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

/* Analysis summary */
.analysis-summary {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-3xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.analysis-summary p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
  line-height: 1.6;
}

.analysis-meta {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.analysis-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

.analysis-chip-label { color: var(--color-text-faint); }

/* ============================================
   STEP 4 — GENERATED PROMPT
   ============================================ */
.prompt-output-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-3xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.prompt-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--header-bg);
  backdrop-filter: var(--header-blur);
  -webkit-backdrop-filter: var(--header-blur);
  border-bottom: 1px solid var(--color-divider);
}

.prompt-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.prompt-toolbar-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-success);
}

.prompt-toolbar-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.prompt-toolbar-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}

.prompt-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  transition: all var(--transition-interactive);
}
.prompt-copy-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,113,227,0.3);
}
.prompt-copy-btn.copied {
  background: var(--color-success);
  transform: scale(1.05);
}
.prompt-copy-btn:active { transform: translateY(0); }

.prompt-body {
  padding: var(--space-8);
  overflow-x: auto;
  background: var(--color-bg);
}

/* Prompt sections */
.prompt-section {
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: promptSectionEnter 350ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes promptSectionEnter {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.prompt-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.prompt-tag.tag-role     { background: rgba(0,113,227,0.1); color: var(--color-primary); }
.prompt-tag.tag-context  { background: rgba(52,199,89,0.1); color: var(--color-success); }
.prompt-tag.tag-task     { background: rgba(255,149,0,0.12); color: var(--color-warning); }
.prompt-tag.tag-format   { background: rgba(0,113,227,0.07); color: var(--color-primary); }
.prompt-tag.tag-style    { background: rgba(52,199,89,0.07); color: var(--color-success); }
.prompt-tag.tag-rules    { background: rgba(255,59,48,0.1); color: var(--color-error); }
.prompt-tag.tag-paste    { background: var(--color-surface-dynamic); color: var(--color-text-muted); }

[data-theme="dark"] .prompt-tag.tag-role     { background: rgba(10,132,255,0.15); color: var(--color-primary); }
[data-theme="dark"] .prompt-tag.tag-context  { background: rgba(48,209,88,0.15); color: var(--color-success); }
[data-theme="dark"] .prompt-tag.tag-task     { background: rgba(255,159,10,0.15); color: var(--color-warning); }
[data-theme="dark"] .prompt-tag.tag-format   { background: rgba(10,132,255,0.1); color: var(--color-primary); }
[data-theme="dark"] .prompt-tag.tag-style    { background: rgba(48,209,88,0.1); color: var(--color-success); }
[data-theme="dark"] .prompt-tag.tag-rules    { background: rgba(255,69,58,0.15); color: var(--color-error); }

.prompt-content {
  font-family: var(--font-mono);
  font-size: clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-surface);
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-divider);
  white-space: pre-wrap;
  word-break: break-word;
}

.prompt-section-divider {
  height: 1px;
  background: var(--color-divider);
  margin: var(--space-6) 0;
}

/* Action bar below prompt */
.prompt-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}

.prompt-success-msg {
  font-size: var(--text-sm);
  color: var(--color-success);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
}

/* ============================================
   SEND TO AI MODELS
   ============================================ */
.send-to-section {
  margin-top: var(--space-8);
}

.send-to-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-5);
  letter-spacing: 0.02em;
}

.send-to-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.send-to-btn {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-2xl);
  cursor: pointer;
  transition: all 250ms cubic-bezier(0.16, 1, 0.3, 1);
  text-align: left;
  position: relative;
  overflow: hidden;
}

.send-to-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 250ms ease;
  border-radius: inherit;
}

.send-to-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.send-to-btn:hover::before {
  opacity: 1;
}

.send-to-btn:active {
  transform: translateY(0);
}

/* ChatGPT */
.send-to-chatgpt .send-to-icon { color: #10a37f; }
.send-to-chatgpt::before { background: linear-gradient(135deg, rgba(16,163,127,0.06) 0%, rgba(16,163,127,0.02) 100%); }
.send-to-chatgpt:hover { border-color: rgba(16,163,127,0.3); }

/* Gemini */
.send-to-gemini .send-to-icon { color: #4285f4; }
.send-to-gemini::before { background: linear-gradient(135deg, rgba(66,133,244,0.06) 0%, rgba(66,133,244,0.02) 100%); }
.send-to-gemini:hover { border-color: rgba(66,133,244,0.3); }

/* Claude */
.send-to-claude .send-to-icon { color: #d97757; }
.send-to-claude::before { background: linear-gradient(135deg, rgba(217,119,87,0.06) 0%, rgba(217,119,87,0.02) 100%); }
.send-to-claude:hover { border-color: rgba(217,119,87,0.3); }

.send-to-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-offset);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 250ms ease;
  position: relative;
  z-index: 1;
}

.send-to-chatgpt:hover .send-to-icon { background: rgba(16,163,127,0.12); }
.send-to-gemini:hover .send-to-icon { background: rgba(66,133,244,0.12); }
.send-to-claude:hover .send-to-icon { background: rgba(217,119,87,0.12); }

.send-to-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.send-to-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}

.send-to-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.3;
  transition: color 200ms ease;
}

.send-to-btn.copied .send-to-hint {
  color: var(--color-success);
}

.send-to-arrow {
  color: var(--color-text-faint);
  flex-shrink: 0;
  transition: color 200ms ease, transform 200ms ease;
  position: relative;
  z-index: 1;
}

.send-to-btn:hover .send-to-arrow {
  color: var(--color-text-muted);
  transform: translate(2px, -2px);
}

/* ============================================
   ERROR STATE
   ============================================ */
.error-state {
  background: var(--color-error-highlight);
  border: 1px solid rgba(255,59,48,0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

[data-theme="dark"] .error-state {
  border-color: rgba(255,69,58,0.3);
}

.error-state-icon {
  color: var(--color-error);
  flex-shrink: 0;
}

.error-state-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
}

.error-state-message {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ============================================
   DEMO MODE BANNER
   ============================================ */
.demo-banner {
  background: var(--color-primary-highlight);
  border: 1px solid rgba(0,113,227,0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-3) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
}

[data-theme="dark"] .demo-banner {
  border-color: rgba(10,132,255,0.2);
}

.demo-banner-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  animation: demoPulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes demoPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.demo-banner-text { color: var(--color-text-muted); }
.demo-banner-text strong { color: var(--color-primary); font-weight: 600; }

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6);
  text-align: center;
}

.app-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: none;
}

/* ============================================
   SKELETON LOADER
   ============================================ */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-offset) 25%,
    var(--color-surface-dynamic) 50%,
    var(--color-surface-offset) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-text { height: 1em; margin-bottom: var(--space-2); }
.skeleton-text:last-child { width: 60%; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .app-main {
    padding: var(--space-6) var(--space-4) var(--space-10);
  }
  .header-inner {
    padding: 0 var(--space-4);
  }
  .form-card {
    padding: var(--space-6);
    border-radius: var(--radius-2xl);
  }
  .optional-fields { grid-template-columns: 1fr; }
  .question-options { grid-template-columns: 1fr; }
  .question-card { padding: var(--space-6); border-radius: var(--radius-2xl); }
  .stepper-label { display: none; }
  .stepper-line { width: var(--space-4); }
  .prompt-body { padding: var(--space-5); }
  .prompt-actions { padding: var(--space-4) var(--space-5); }
  .demo-toggle-label { display: none; }
  .step-title { font-size: var(--text-xl); }
  .analysis-summary { border-radius: var(--radius-2xl); }
  .prompt-output-wrap { border-radius: var(--radius-2xl); }
  .send-to-grid { grid-template-columns: 1fr; }
  .send-to-section { margin-top: var(--space-6); }
}

@media (max-width: 480px) {
  .stepper { gap: var(--space-2); }
  .stepper-dot { width: 24px; height: 24px; font-size: 0.6875rem; }
  .header-top-row { height: 48px; }
}

@media (min-width: 1025px) {
  .step-container {
    max-width: var(--content-default);
  }
}

/* ============================================
   UTILITY
   ============================================ */
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mb-6  { margin-bottom: var(--space-6); }
.flex  { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.flex-col { flex-direction: column; }
.text-center { text-align: center; }
.hidden { display: none !important; }
.w-full { width: 100%; }

/* ============================================
   RATE LIMIT BADGE
   ============================================ */
.rate-limit-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: 100px;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.rate-limit-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34c759;
  flex-shrink: 0;
}

.rate-limit-badge.warning .rate-limit-dot {
  background: #ff9f0a;
}

.rate-limit-badge.critical .rate-limit-dot {
  background: #ff3b30;
}

.rate-limit-badge.critical {
  color: #ff3b30;
  border-color: oklch(from #ff3b30 l c h / 0.3);
  background: oklch(from #ff3b30 l c h / 0.06);
}

.rate-limit-text {
  letter-spacing: 0.01em;
}

/* Rate limit banner shown when limit reached */
.rate-limit-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg, 12px);
  background: oklch(from #ff9f0a l c h / 0.08);
  border: 1px solid oklch(from #ff9f0a l c h / 0.2);
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin-top: var(--space-4);
}

.rate-limit-banner svg {
  color: #ff9f0a;
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .rate-limit-badge {
    padding: var(--space-1) var(--space-2);
    font-size: 0.6875rem;
  }
}