/* ==========================================================================
   Liquid Professional Pro — Design System v1.0
   Project: ContractCheck (AI Legal Assistant)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* ---------------------------------------------------------
     1. COLOR PALETTE (Dark Theme - Primary)
     --------------------------------------------------------- */
  --color-bg-deep: #0A0E1A;
  --color-bg-surface: #141B2D;
  --color-bg-elevated: #1E2842;
  
  --color-text-primary: #F0F4FF;
  --color-text-secondary: #94A3C8;
  --color-text-muted: #5A6B8F;
  
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  --color-border-accent: rgba(79, 110, 247, 0.4);

  /* Accents */
  --color-primary: #4F6EF7;
  --color-secondary: #7C5CFC;
  --color-accent: #00D4AA;
  --gradient-cta: linear-gradient(135deg, #4F6EF7 0%, #7C5CFC 100%);
  --gradient-cta-hover: linear-gradient(135deg, #5e7bf8 0%, #8b6dfc 100%);
  --gradient-glass: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);

  /* Status */
  --color-success: #00C853;
  --color-success-bg: rgba(0, 200, 83, 0.1);
  --color-warning: #FFB300;
  --color-warning-bg: rgba(255, 179, 0, 0.1);
  --color-error: #FF3D00;
  --color-error-bg: rgba(255, 61, 0, 0.1);
  --color-info: #2979FF;
  --color-info-bg: rgba(41, 121, 255, 0.1);

  /* ---------------------------------------------------------
     2. TYPOGRAPHY (Inter, scale x1.25)
     --------------------------------------------------------- */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-h1: 56px;
  --font-size-h2: 36px;
  --font-size-h3: 24px;
  --font-size-body-large: 18px;
  --font-size-body: 16px;
  --font-size-body-small: 14px;
  --font-size-caption: 12px;

  --line-height-h1: 1.05;
  --line-height-h2: 1.15;
  --line-height-h3: 1.25;
  --line-height-body-large: 1.6;
  --line-height-body: 1.5;
  --line-height-body-small: 1.5;
  --line-height-caption: 1.4;

  /* ---------------------------------------------------------
     3. SPACING SCALE (Base 8px)
     --------------------------------------------------------- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;

  /* ---------------------------------------------------------
     4. RADIUS
     --------------------------------------------------------- */
  --radius-none: 0px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ---------------------------------------------------------
     5. SHADOWS & ELEVATION
     --------------------------------------------------------- */
  --shadow-level1: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-level2: 0 4px 16px rgba(0, 0, 0, 0.20);
  --shadow-level3: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-level4: 0 16px 48px rgba(0, 0, 0, 0.35);

  /* ---------------------------------------------------------
     6. TRANSITIONS & HIT AREA
     --------------------------------------------------------- */
  --transition-default: all 0.2s ease;
  --min-hit-area: 44px;
}

/* Light Theme Variables (Optional) */
[data-theme="light"] {
  --color-bg-deep: #F8F9FC;
  --color-bg-surface: #FFFFFF;
  --color-bg-elevated: #F0F4FA;
  
  --color-text-primary: #1A1F36;
  --color-text-secondary: #4F5B76;
  --color-text-muted: #8792A2;
  
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-hover: rgba(0, 0, 0, 0.16);
  --color-border-accent: rgba(79, 110, 247, 0.5);
  
  --shadow-level1: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-level2: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-level3: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-level4: 0 16px 48px rgba(0, 0, 0, 0.18);
}

/* ==========================================================================
   Base Elements
   ========================================================================== */

body.lp-body, .lp-root {
  background-color: var(--color-bg-deep);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Classes */
.lp-h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  line-height: var(--line-height-h1);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.lp-h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  line-height: var(--line-height-h2);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.lp-h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: var(--line-height-h3);
  color: var(--color-text-primary);
}

.lp-body-large {
  font-size: var(--font-size-body-large);
  font-weight: 400;
  line-height: var(--line-height-body-large);
  color: var(--color-text-secondary);
}

.lp-body {
  font-size: var(--font-size-body);
  font-weight: 400;
  line-height: var(--line-height-body);
  color: var(--color-text-secondary);
}

.lp-body-small {
  font-size: var(--font-size-body-small);
  font-weight: 400;
  line-height: var(--line-height-body-small);
  color: var(--color-text-secondary);
}

.lp-caption {
  font-size: var(--font-size-caption);
  font-weight: 500;
  line-height: var(--line-height-caption);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Components: Buttons
   ========================================================================== */

.lp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-default);
  white-space: nowrap;
  outline: none;
  min-height: var(--min-hit-area);
}

.lp-btn:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg-deep), 0 0 0 4px var(--color-primary);
}

/* Button Sizes */
.lp-btn-lg {
  padding: 16px 40px;
  font-size: var(--font-size-body-large);
  border-radius: var(--radius-lg);
}

.lp-btn-md {
  padding: 12px 24px;
  font-size: var(--font-size-body);
  border-radius: var(--radius-md);
}

.lp-btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-body-small);
  border-radius: var(--radius-sm);
  min-height: 36px;
}

/* Button Variants */
.lp-btn-primary {
  background: var(--gradient-cta);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 14px rgba(79, 110, 247, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.lp-btn-primary:hover {
  transform: translateY(-2px);
  background: var(--gradient-cta-hover);
  box-shadow: 0 6px 20px rgba(79, 110, 247, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.lp-btn-primary:active {
  transform: translateY(1px);
}

.lp-btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.lp-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 4px 12px rgba(0, 0, 0, 0.2);
}

.lp-btn-tertiary {
  background: transparent;
  color: var(--color-primary);
  border: none;
}

.lp-btn-tertiary:hover {
  color: #7C5CFC;
  transform: translateY(-2px);
}

.lp-btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
}

.lp-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
}

.lp-btn:disabled, .lp-btn.is-disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ==========================================================================
   Components: Inputs & Forms
   ========================================================================== */

.lp-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.lp-label {
  font-size: var(--font-size-body-small);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.lp-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  transition: var(--transition-default);
  outline: none;
  box-sizing: border-box;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.lp-input-lg {
  height: 56px;
  font-size: var(--font-size-body-large);
}

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

.lp-input:hover {
  border-color: var(--color-border-hover);
}

.lp-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(79, 110, 247, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Components: Cards (Liquid Glass)
   ========================================================================== */

.lp-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-level1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: var(--transition-default);
  position: relative;
  overflow: hidden;
}

.lp-card-header {
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
}

.lp-card-hover:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-level2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Glass Variant with Specular Highlight (Liquid Glass) */
.lp-card-glass {
  background: linear-gradient(180deg, rgba(20, 27, 45, 0.85) 0%, rgba(10, 14, 26, 0.75) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-level1), inset 0 1px 1px rgba(255, 255, 255, 0.15);
}

.lp-card-glass:hover {
  border-color: rgba(79, 110, 247, 0.4);
  box-shadow: var(--shadow-level2), 0 0 24px rgba(79, 110, 247, 0.16), inset 0 1px 1px rgba(255, 255, 255, 0.25);
}

/* Featured / Pricing Card */
.lp-card-featured {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-primary);
  box-shadow: var(--shadow-level3), 0 0 30px rgba(79, 110, 247, 0.2);
}

/* Stat Card */
.lp-stat-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.lp-stat-value {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.1;
}

.lp-stat-label {
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Components: Chips / Tags
   ========================================================================== */

.lp-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-caption);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.lp-chip-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: rgba(0, 200, 83, 0.25);
}

.lp-chip-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: rgba(255, 179, 0, 0.25);
}

.lp-chip-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-color: rgba(255, 61, 0, 0.25);
}

.lp-chip-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border-color: rgba(41, 121, 255, 0.25);
}

.lp-chip-primary {
  background: rgba(79, 110, 247, 0.12);
  color: var(--color-primary);
  border-color: rgba(79, 110, 247, 0.3);
}

/* ==========================================================================
   Components: Tabs
   ========================================================================== */

.lp-tabs {
  display: flex;
  gap: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

.lp-tab-item {
  padding: 12px 4px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  transition: var(--transition-default);
  background: none;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.lp-tab-item:hover {
  color: var(--color-text-primary);
}

.lp-tab-item.active {
  color: var(--color-text-primary);
  font-weight: 600;
}

.lp-tab-item.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px 2px 0 0;
}

/* ==========================================================================
   Components: Alerts / Toasts
   ========================================================================== */

.lp-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-body-small);
  border: 1px solid transparent;
  margin-bottom: var(--space-md);
}

.lp-alert-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border-color: rgba(0, 200, 83, 0.2);
}

.lp-alert-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: rgba(255, 179, 0, 0.2);
}

.lp-alert-error {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  border-color: rgba(255, 61, 0, 0.2);
}

.lp-alert-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
  border-color: rgba(41, 121, 255, 0.2);
}

/* ==========================================================================
   Components: Modal
   ========================================================================== */

.lp-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.lp-modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lp-modal-container {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-xl);
  max-width: 560px;
  width: 100%;
  padding: var(--space-xl);
  box-shadow: var(--shadow-level4);
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.lp-modal-overlay.is-open .lp-modal-container {
  transform: scale(1);
}

.lp-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.lp-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* ==========================================================================
   Icons (Feather/Phosphor style standard)
   ========================================================================== */

.lp-icon {
  width: 24px;
  height: 24px;
  stroke: var(--color-text-secondary);
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  flex-shrink: 0;
}

.lp-icon-sm {
  width: 20px;
  height: 20px;
}

.lp-icon-lg {
  width: 32px;
  height: 32px;
}

.lp-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--min-hit-area);
  height: var(--min-hit-area);
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition-default);
}

.lp-icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.lp-icon-btn:hover .lp-icon {
  stroke: var(--color-text-primary);
}

/* Navigation Links */
.nav-link {
  font-family: var(--font-family);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: 8px;
  transition: var(--transition-default);
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link-active,
.nav-link.active {
  color: var(--color-primary) !important;
  background: rgba(79, 110, 247, 0.08) !important;
  font-weight: 600;
}

/* Responsive Navbar Display Rules */
@media (min-width: 1024px) {
  #main-nav-links {
    display: flex !important;
  }
  #mobile-menu-btn {
    display: none !important;
  }
}

@media (max-width: 1023px) {
  #main-nav-links {
    display: none !important;
  }
  #mobile-menu-btn {
    display: inline-flex !important;
  }
}

/* Background Atmosphere Glow */
.hero-glow-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 720px;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(79, 110, 247, 0.14) 0%, rgba(124, 92, 252, 0.05) 50%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}