/**
 * PeptideVerify Design System
 * Premium Glassmorphism SaaS Theme
 * Version: 1.0.0
 */

/* ========================================
   CSS VARIABLES - UNIFIED COLOR SYSTEM
   ======================================== */

:root {
  /* Background Layers */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a1f2e;
  --bg-subtle: #0f1419;

  /* Borders */
  --border: #2a3142;
  --border-light: rgba(255, 255, 255, 0.1);

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Brand/Accent */
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-deep: #1e40af;

  /* Status Colors */
  --success: #10b981;
  --success-hover: #059669;
  --warning: #f59e0b;
  --warning-hover: #d97706;
  --error: #ef4444;
  --error-hover: #dc2626;
  --info: #06b6d4;
  --info-hover: #0891b2;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.3),
                  0 8px 24px rgba(0, 0, 0, 0.2),
                  0 1px 0 rgba(255, 255, 255, 0.05) inset;
  --shadow-glass-hover: 0 24px 70px rgba(0, 0, 0, 0.35),
                        0 12px 32px rgba(0, 0, 0, 0.25);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-primary-hover: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --gradient-border: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
}

/* Light Mode Overrides */
[data-theme="light"],
body:not([data-theme="dark"]) {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;

  --border: #e2e8f0;
  --border-light: rgba(226, 232, 240, 0.6);

  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.08),
                  0 8px 24px rgba(0, 0, 0, 0.04),
                  0 1px 0 rgba(255, 255, 255, 0.1) inset;
  --shadow-glass-hover: 0 24px 70px rgba(0, 0, 0, 0.12),
                        0 12px 32px rgba(0, 0, 0, 0.06);
}

/* ========================================
   GLASSMORPHISM COMPONENTS
   ======================================== */

/* Premium Glass Card */
.glass-card {
  background: rgba(26, 31, 46, 0.5);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass);
  transition: all var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glass-hover);
}

[data-theme="light"] .glass-card {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(203, 213, 225, 0.8);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08),
              0 4px 12px rgba(0, 0, 0, 0.04),
              inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

/* Default light mode (no data-theme attribute) */
body:not([data-theme="dark"]) .glass-card {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(203, 213, 225, 0.8);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08),
              0 4px 12px rgba(0, 0, 0, 0.04),
              inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

/* Premium Glass Card with Gradient Border */
.glass-card-gradient {
  position: relative;
  background: rgba(26, 31, 46, 0.5);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius-md);
  padding: 1px;
  box-shadow: var(--shadow-glass);
  transition: all var(--transition-base);
}

.glass-card-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  padding: 1px;
  background: var(--gradient-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.6;
}

.glass-card-gradient-inner {
  position: relative;
  background: rgba(26, 31, 46, 0.95);
  border-radius: var(--radius-md);
  padding: 24px;
}

[data-theme="light"] .glass-card-gradient {
  background: rgba(255, 255, 255, 0.95);
}

[data-theme="light"] .glass-card-gradient-inner {
  background: rgba(255, 255, 255, 0.98);
}

/* Glass Container (lighter) */
.glass-container {
  background: rgba(26, 31, 46, 0.3);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

[data-theme="light"] .glass-container {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(203, 213, 225, 0.6);
}

body:not([data-theme="dark"]) .glass-container {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(203, 213, 225, 0.6);
}

/* Glass Hero Section */
.glass-hero {
  background: rgba(26, 31, 46, 0.6);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 48px 32px;
}

[data-theme="light"] .glass-hero {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(203, 213, 225, 0.8);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1),
              0 8px 24px rgba(0, 0, 0, 0.05);
}

body:not([data-theme="dark"]) .glass-hero {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(203, 213, 225, 0.8);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1),
              0 8px 24px rgba(0, 0, 0, 0.05);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  white-space: nowrap;
}

/* Button Ripple Effect */
.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

/* Primary Button */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
  background: var(--gradient-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

/* Secondary Button */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Success Button */
.btn-success {
  background: var(--gradient-success);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(16, 185, 129, 0.3);
}

/* Warning Button */
.btn-warning {
  background: var(--gradient-warning);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(245, 158, 11, 0.2);
}

.btn-warning:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.3);
}

/* Error Button */
.btn-error {
  background: var(--gradient-error);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.2);
}

.btn-error:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(239, 68, 68, 0.3);
}

/* Button Sizes */
.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', 'Helvetica Neue', Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
}

h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--text-primary);
}

h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

h4 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

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

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

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   FORM INPUTS
   ======================================== */

input, select, textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Mobile: Prevent iOS zoom */
@media (max-width: 640px) {
  input, select, textarea {
    font-size: 16px !important;
  }
}

/* ========================================
   STATUS BADGES
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ========================================
   UTILITIES
   ======================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 968px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }

.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mt-xl { margin-top: 48px; }

.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }
.mb-xl { margin-bottom: 48px; }

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

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

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

.slide-in {
  animation: slideIn 0.3s ease-out;
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  background: var(--bg-subtle);
  border-color: var(--accent);
  transform: scale(1.05);
}

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

@media (max-width: 968px) {
  h1 { font-size: 32px; }
  h2 { font-size: 22px; }
  .section { padding: 60px 0; }
}

@media (max-width: 640px) {
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
  .section { padding: 40px 0; }
  .container { padding: 0 16px; }
}