/* ========================================
   THEME VARIABLES
======================================== */

:root {
  /* Spacing System */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  /* Typography */
  --font-xs: 12px;
  --font-sm: 13px;
  --font-base: 14px;
  --font-md: 16px;
  --font-lg: 18px;
  --font-xl: 24px;
  --font-2xl: 32px;
  --font-3xl: 42px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
body.theme-light {
  --bg: #f9fafb;
  --bg-secondary: #f3f4f6;
  --panel: #ffffff;
  --panel-hover: #fafafa;
  --text: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: rgba(37, 99, 235, 0.1);
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --ambience-color-1: rgba(37, 99, 235, 0.05);
  --ambience-color-2: rgba(139, 92, 246, 0.05);
}

/* Dark Theme */
body.theme-dark {
  --bg: #0a0e1a;
  --bg-secondary: #111827;
  --panel: #1a1f35;
  --panel-hover: #1e2540;
  --text: #f3f4f6;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);
  --border: #2d3550;
  --border-strong: #3f4a6b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --ambience-color-1: rgba(59, 130, 246, 0.08);
  --ambience-color-2: rgba(139, 92, 246, 0.08);
}

/* High Contrast Theme */
body.theme-contrast {
  --bg: #000000;
  --bg-secondary: #0a0a0a;
  --panel: #000000;
  --panel-hover: #1a1a1a;
  --text: #ffffff;
  --text-secondary: #ffffff;
  --text-muted: #cccccc;
  --accent: #ffff00;
  --accent-hover: #ffff33;
  --accent-light: rgba(255, 255, 0, 0.15);
  --border: #ffffff;
  --border-strong: #ffffff;
  --success: #00ff00;
  --warning: #ffaa00;
  --danger: #ff0000;
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
  --shadow-xl: none;
  --ambience-color-1: rgba(255, 255, 0, 0.05);
  --ambience-color-2: rgba(0, 255, 255, 0.05);
}

/* Obsidian Purple Theme (Premium) */
body.theme-obsidian {
  --bg: #0d0a14;
  --bg-secondary: #1a1425;
  --panel: #1f1833;
  --panel-hover: #251e3d;
  --text: #e8e3f5;
  --text-secondary: #c5b8e3;
  --text-muted: #9b8bc4;
  --accent: #a78bfa;
  --accent-hover: #8b5cf6;
  --accent-light: rgba(167, 139, 250, 0.15);
  --border: #3a2d5a;
  --border-strong: #4f3e7a;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --shadow-sm: 0 1px 2px rgba(139, 92, 246, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(139, 92, 246, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(139, 92, 246, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(139, 92, 246, 0.4);
  --ambience-color-1: rgba(167, 139, 250, 0.08);
  --ambience-color-2: rgba(236, 72, 153, 0.08);
}

/* ========================================
   GLOBAL RESETS & BASE STYLES
======================================== */

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ========================================
   ANIMATED BACKGROUND AMBIENCE
======================================== */

.ambience-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambience-layer::before,
.ambience-layer::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.6;
  animation: float 20s ease-in-out infinite;
}

.ambience-layer::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--ambience-color-1), transparent);
  top: -200px;
  left: -200px;
  animation-delay: 0s;
}

.ambience-layer::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--ambience-color-2), transparent);
  bottom: -150px;
  right: -150px;
  animation-delay: 5s;
  animation-duration: 25s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(50px, -50px) scale(1.1);
  }
  50% {
    transform: translate(-30px, 30px) scale(0.9);
  }
  75% {
    transform: translate(40px, 20px) scale(1.05);
  }
}

/* ========================================
   LAYOUT CONTAINER
======================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .container {
    padding: var(--space-lg) var(--space-md);
  }
}

/* ========================================
   HEADER
======================================== */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.brand-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  color: var(--accent);
}

.brand h1 {
  font-size: var(--font-3xl);
  font-weight: 700;
  letter-spacing: -1px;
  margin: 0;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: var(--font-sm);
  color: var(--text-muted);
  margin-top: 2px;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--accent);
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.3);
  }
}

/* ========================================
   MAIN LAYOUT
======================================== */

.main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 1024px) {
  .main {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   PANELS
======================================== */

.input-panel,
.output-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}

.input-panel {
  position: sticky;
  top: var(--space-lg);
}

.panel-header {
  margin-bottom: var(--space-xl);
}

.panel-header h2 {
  font-size: var(--font-xl);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text);
}

.panel-subtitle {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

/* ========================================
   FORM SECTIONS
======================================== */

.form-section {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.form-section:last-of-type {
  border-bottom: none;
  margin-bottom: var(--space-lg);
}

.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
}

.section-icon {
  font-size: var(--font-md);
  opacity: 0.8;
}

/* ========================================
   FORM GROUPS
======================================== */

.form-group {
  margin-bottom: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

input,
select {
  width: 100%;
  padding: var(--space-md);
  padding-right: 60px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text);
  font-size: var(--font-base);
  font-family: inherit;
  transition: all var(--transition-fast);
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--accent);
  background: var(--panel);
  box-shadow: 0 0 0 3px var(--accent-light);
}

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

.input-unit {
  position: absolute;
  right: var(--space-md);
  font-size: var(--font-sm);
  color: var(--text-muted);
  pointer-events: none;
}

.field-hint {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-xs);
  color: var(--text-muted);
  font-style: italic;
}

select {
  padding-right: var(--space-md);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

/* ========================================
   BUTTONS
======================================== */

.btn-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: white;
  font-size: var(--font-base);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-icon {
  display: flex;
  align-items: center;
}

/* ========================================
   FORM FOOTER & PROGRESS
======================================== */

.form-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
}

.step {
  flex: 1;
  text-align: center;
  padding: var(--space-xs);
  font-size: var(--font-xs);
  color: var(--text-muted);
  position: relative;
  font-weight: 500;
}

.step::before {
  content: '';
  display: block;
  width: 100%;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  margin-bottom: var(--space-xs);
  transition: background var(--transition-base);
}

.step.active {
  color: var(--accent);
}

.step.active::before {
  background: var(--accent);
}

/* ========================================
   OUTPUT PANEL STATES
======================================== */

.output-panel {
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.state {
  width: 100%;
  text-align: center;
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.state.hidden {
  display: none;
  opacity: 0;
  transform: translateY(20px);
}

/* ========================================
   IDLE STATE
======================================== */

.idle-illustration {
  margin-bottom: var(--space-lg);
  color: var(--text-muted);
  opacity: 0.6;
}

.idle-illustration svg {
  animation: rotate-slow 20s linear infinite;
}

@keyframes rotate-slow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.idle-title {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-sm);
}

.idle-text {
  font-size: var(--font-base);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 400px;
  margin: 0 auto var(--space-lg);
}

.idle-features {
  display: inline-block;
  text-align: left;
  margin-top: var(--space-lg);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--success);
  color: white;
  border-radius: 50%;
  font-size: 12px;
  font-weight: bold;
}

/* ========================================
   LOADING STATE
======================================== */

.loading-container {
  padding: var(--space-xl);
}

.pulse-loader {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.pulse-loader span {
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-wave 1.4s ease-in-out infinite;
}

.pulse-loader span:nth-child(2) {
  animation-delay: 0.2s;
}

.pulse-loader span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes pulse-wave {
  0%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.3);
    opacity: 1;
  }
}

.loading-title {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-lg);
}

.loading-stages {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 320px;
  margin: 0 auto;
}

.stage {
  padding: var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(-20px);
  animation: stage-reveal 0.5s ease forwards;
}

.stage-1 {
  animation-delay: 0.3s;
}

.stage-2 {
  animation-delay: 0.6s;
}

.stage-3 {
  animation-delay: 0.9s;
}

@keyframes stage-reveal {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========================================
   RESULT STATE (Dynamic Content)
======================================== */

#resultState h2 {
  font-size: var(--font-xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--text);
  text-align: center;
}

#resultState p {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-base);
}

#resultState strong {
  font-weight: 600;
  color: var(--text-secondary);
}

.risk-visual {
  margin: var(--space-xl) 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

canvas {
  max-width: 200px;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

/* AI Advice Styling */
.ai-loader {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: var(--space-md) auto;
}

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

.ai-advice {
  padding: var(--space-lg);
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  text-align: left;
  animation: advice-appear 0.6s ease;
  box-shadow: 0 0 0 0 var(--accent);
}

.ai-advice p {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  display: block;
  line-height: 1.7;
  color: var(--text);
}

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

/* ========================================
   DISCLAIMER
======================================== */

.disclaimer {
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.disclaimer-icon {
  font-size: var(--font-xl);
  flex-shrink: 0;
}

.disclaimer-content {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.disclaimer-content strong {
  color: var(--text);
  font-weight: 600;
}

/* ========================================
   THEME TOGGLE
======================================== */

.theme-toggle {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  gap: var(--space-xs);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
}

.theme-toggle button {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle button:hover {
  background: var(--accent-light);
  color: var(--accent);
  transform: scale(1.1);
}

.theme-toggle button.theme-premium:hover {
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.2), rgba(236, 72, 153, 0.2));
  color: #a78bfa;
}

@media (max-width: 640px) {
  .theme-toggle {
    bottom: var(--space-md);
    right: var(--space-md);
  }
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
======================================== */

@media (max-width: 1024px) {
  .input-panel {
    position: relative;
    top: 0;
  }
  
  .output-panel {
    min-height: 400px;
  }
}

@media (max-width: 640px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .brand h1 {
    font-size: var(--font-2xl);
  }
  
  .panel-header h2 {
    font-size: var(--font-lg);
  }
  
  .input-panel,
  .output-panel {
    padding: var(--space-lg);
  }
}

/* ========================================
   ACCESSIBILITY
======================================== */

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

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:focus-visible {
  outline-offset: 4px;
}