/* ==========================================================================
   OmniQR Studio - Design System & Styling
   Created by Havoc-terminal (https://github.com/Havoc-terminal)
   ========================================================================== */

/* --- CSS Variables & Design System Tokens --- */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', system-ui, sans-serif;

  /* Color Palette - Cream White Light Mode Default */
  --bg-primary: #f7f4ee;
  --bg-surface: rgba(253, 250, 244, 0.85);
  --bg-surface-hover: rgba(255, 253, 248, 0.95);
  --bg-card: rgba(255, 252, 247, 0.9);
  --bg-input: rgba(255, 255, 255, 0.95);

  --border-color: rgba(224, 216, 203, 0.8);
  --border-focus: #6366f1;

  --text-primary: #1c1917;
  --text-secondary: #44403c;
  --text-muted: #78716c;

  --brand-primary: #6366f1;
  --brand-primary-hover: #4f46e5;
  --brand-purple: #9333ea;
  --brand-purple-hover: #7e22ce;
  --brand-dark: #1c1917;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-glass: 0 20px 40px -15px rgba(120, 113, 108, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Dark Mode Theme Override --- */
html.dark {
  --bg-primary: #0b0f19;
  --bg-surface: rgba(15, 23, 42, 0.75);
  --bg-surface-hover: rgba(30, 41, 59, 0.85);
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-input: rgba(15, 23, 42, 0.85);

  --border-color: rgba(255, 255, 255, 0.1);
  --border-focus: #818cf8;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --shadow-glass: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Ambient Gradient Mesh */
.bg-gradient-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 10% 10%, rgba(243, 232, 215, 0.6) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 45%),
              radial-gradient(circle at 50% 50%, rgba(245, 239, 228, 0.5) 0%, transparent 50%);
}

html.dark .bg-gradient-mesh {
  background: radial-gradient(circle at 10% 10%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(147, 51, 234, 0.12) 0%, transparent 45%),
              radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
}

/* --- Navigation Header --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-purple));
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.brand-subtitle {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.btn-primary {
  background-color: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  background-color: var(--brand-primary-hover);
  transform: translateY(-1px);
}

.btn-purple {
  background-color: var(--brand-purple);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(147, 51, 234, 0.35);
}
.btn-purple:hover {
  background-color: var(--brand-purple-hover);
  transform: translateY(-1px);
}

.btn-dark {
  background-color: var(--brand-dark);
  color: #ffffff;
}
.btn-dark:hover {
  background-color: #0f172a;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-outline:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
}

.btn-icon {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-icon:hover {
  background-color: var(--bg-surface-hover);
}

.btn-theme .icon-sun { display: none; color: #f59e0b; }
.btn-theme .icon-moon { display: block; color: #818cf8; }
html.dark .btn-theme .icon-sun { display: block; }
html.dark .btn-theme .icon-moon { display: none; }

.btn-link {
  background: none;
  border: none;
  color: var(--brand-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.btn-link:hover { text-decoration: underline; }
.btn-link.text-muted { color: var(--text-muted); }

/* --- Layout Grid --- */
.main-container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  flex: 1;
}

@media (min-width: 1024px) {
  .main-container {
    grid-template-columns: 1.3fr 0.85fr;
  }
}

.workspace-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Glassmorphism Cards */
.card {
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-glass);
}

.glass-card {
  background-color: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Type Navigation Tabs */
.type-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem;
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  overflow-x: auto;
}

.type-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.type-tab:hover {
  color: var(--text-primary);
  background-color: rgba(99, 102, 241, 0.08);
}

.type-tab.active {
  background-color: var(--brand-primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Form Styling */
.form-panel {
  display: none;
}
.form-panel.active {
  display: block;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.input-wrapper {
  position: relative;
  width: 100%;
}

input[type="text"],
input[type="url"],
input[type="email"],
input[type="tel"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.btn-input-copy {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.4rem;
}
.btn-input-copy:hover { color: var(--text-primary); }

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.auto-detect-tag {
  color: var(--brand-primary);
  font-weight: 600;
}

.mb-3 { margin-bottom: 0.75rem; }
.mt-2 { margin-top: 0.5rem; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.checkbox-group, .checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-secondary);
}

/* Customizer Grid */
.customizer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .customizer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

input[type="color"] {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: none;
  cursor: pointer;
}

.hex-badge, .val-badge {
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--brand-primary);
}

/* Logo Upload Area */
.logo-upload-box {
  position: relative;
  margin-top: 1rem;
  padding: 1.25rem;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  background-color: rgba(99, 102, 241, 0.03);
}

.logo-upload-box:hover {
  border-color: var(--brand-primary);
}

.hidden-file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.icon-upload {
  font-size: 1.5rem;
  color: var(--brand-primary);
  margin-bottom: 0.35rem;
}

.upload-title { font-size: 0.8rem; color: var(--text-primary); }
.upload-hint { font-size: 0.7rem; color: var(--text-muted); }

.logo-active-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
}

.logo-active-row img {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 0.2rem;
  border: 1px solid var(--border-color);
}

.logo-name { font-size: 0.8rem; font-weight: 600; }
.btn-text-danger { background: none; border: none; color: #ef4444; font-size: 0.75rem; cursor: pointer; }

/* Right Panel: Sticky Live Preview */
.sticky-card {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.preview-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.status-indicator {
  font-size: 0.7rem;
  font-weight: 600;
  color: #10b981;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.status-indicator .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.qr-canvas-container {
  padding: 1.25rem;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#qr-canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

.export-actions {
  width: 100%;
}

.button-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.button-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  width: 100%;
  max-width: 540px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

.modal-small { max-width: 380px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.modal-actions { display: flex; align-items: center; gap: 0.75rem; }

.btn-close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
}
.btn-close-modal:hover { color: var(--text-primary); }

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 360px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
}

.history-thumb {
  width: 2.75rem;
  height: 2.75rem;
  object-fit: contain;
  background: #ffffff;
  padding: 0.2rem;
  border-radius: var(--radius-sm);
}

.history-info { flex: 1; min-width: 0; }
.history-title { font-size: 0.8rem; font-weight: 700; truncate: true; }
.history-text { font-size: 0.7rem; color: var(--text-muted); font-family: monospace; }

.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.empty-state i { font-size: 2rem; margin-bottom: 0.5rem; }

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
}
kbd {
  font-family: monospace;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
}

/* Toast System */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  background-color: rgba(15, 23, 42, 0.95);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  animation: slideToast 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

.footer {
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Watermark Badge */
.watermark-badge {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: 35;
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  color: var(--brand-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  pointer-events: none;
  user-select: none;
}

.watermark-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--brand-primary);
  box-shadow: 0 0 8px var(--brand-primary);
}

.watermark-tag {
  font-family: monospace;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--brand-primary);
  opacity: 0.85;
}

.hidden { display: none !important; }