/* ============================================
   ReactorDSP Professional Dark Theme
   Inspired by Submission Audio, Steven Slate Drums, MDL Tone
   ============================================ */

/* ===========================================
   1. CSS Variables (Theme Tokens)
   =========================================== */
:root {
  /* Background colors */
  --color-bg-dark: #0a0a0b;
  --color-bg-surface: #141416;
  --color-bg-elevated: #1a1a1e;
  --color-bg-input: #0f0f11;

  /* Border colors */
  --color-border: #2a2a2e;
  --color-border-subtle: #1f1f23;

  /* Accent colors (Purple theme) */
  --color-accent: #8a76f4;
  --color-accent-hover: #a394f7;
  --color-accent-dark: #7c3aed;
  --color-accent-glow: rgba(138, 118, 244, 0.3);
  --color-accent-subtle: rgba(138, 118, 244, 0.1);

  /* Text colors */
  --color-text: #ffffff;
  --color-text-secondary: #e0e0e0;
  --color-text-muted: #8a8a8a;
  --color-text-dim: #5a5a5a;

  /* Status colors */
  --color-success: #22c55e;
  --color-success-bg: rgba(34, 197, 94, 0.15);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.15);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.15);
  --color-info: #3b82f6;
  --color-info-bg: rgba(59, 130, 246, 0.15);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--color-accent-glow);

  /* Spacing & sizing */
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ===========================================
   2. Base Resets & Typography
   =========================================== */
html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
  scroll-behavior: smooth;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg-dark);
  color: var(--color-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body > main {
  flex: 1 0 auto;
  padding-bottom: 3rem;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 600; }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

/* Selection */
::selection {
  background-color: var(--color-accent);
  color: #000;
}

/* ===========================================
   3. Bootstrap Overrides - Layout
   =========================================== */

/* Container adjustments */
.container {
  max-width: 1400px;
}

/* Navbar */
.navbar {
  background-color: var(--color-bg-surface) !important;
  border-bottom: 1px solid var(--color-border) !important;
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 0;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text) !important;
  letter-spacing: -0.02em;
}

.navbar-brand:hover {
  color: var(--color-accent) !important;
}

.nav-link {
  color: var(--color-text-muted) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-text) !important;
}

.nav-link.active {
  color: var(--color-accent) !important;
}

/* Remove text-dark class effects in navbar */
.navbar .text-dark {
  color: var(--color-text-muted) !important;
}

.navbar .text-dark:hover {
  color: var(--color-text) !important;
}

/* Navbar toggler for mobile */
.navbar-toggler {
  border-color: var(--color-border);
  padding: 0.5rem;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Dropdown menus */
.dropdown-menu {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
}

.dropdown-item {
  color: var(--color-text-secondary);
  border-radius: calc(var(--border-radius) - 2px);
  padding: 0.5rem 1rem;
  transition: all var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: var(--color-accent-subtle);
  color: var(--color-text);
}

.dropdown-divider {
  border-color: var(--color-border);
  margin: 0.5rem 0;
}

/* ===========================================
   4. Bootstrap Overrides - Components
   =========================================== */

/* Cards */
.card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-accent-glow);
  box-shadow: var(--shadow-md);
}

.card-header {
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  color: var(--color-text);
  font-weight: 600;
}

.card-body {
  color: var(--color-text-secondary);
}

.card-footer {
  background-color: transparent;
  border-top: 1px solid var(--color-border);
}

.card-title {
  color: var(--color-text);
  font-weight: 600;
}

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

/* Buttons */
.btn {
  font-weight: 500;
  border-radius: var(--border-radius);
  padding: 0.5rem 1.25rem;
  transition: all var(--transition-fast);
  border: none;
}

.btn:focus,
.btn:active:focus {
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border: none;
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

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

.btn-outline-primary {
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn-outline-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: transparent;
}

.btn-outline-secondary:hover {
  background-color: var(--color-bg-elevated);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.btn-success {
  background-color: var(--color-success);
  border: none;
}

.btn-success:hover {
  background-color: #1ea34d;
}

.btn-danger {
  background-color: var(--color-danger);
  border: none;
}

.btn-danger:hover {
  background-color: #dc2626;
}

.btn-outline-danger {
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
  background: transparent;
}

.btn-outline-danger:hover {
  background-color: var(--color-danger);
  color: #fff;
}

.btn-link {
  color: var(--color-accent);
}

.btn-link:hover {
  color: var(--color-accent-hover);
}

/* Forms */
.form-control,
.form-select {
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  padding: 0.625rem 1rem;
  transition: all var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
  background-color: var(--color-bg-input);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
  color: var(--color-text);
}

.form-control::placeholder {
  color: var(--color-text-dim);
}

.form-label {
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

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

.form-check-input {
  background-color: var(--color-bg-input);
  border: 1px solid var(--color-border);
}

.form-check-input:checked {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.form-check-input:focus {
  box-shadow: 0 0 0 3px var(--color-accent-glow);
  border-color: var(--color-accent);
}

.form-check-label {
  color: var(--color-text-secondary);
}

.input-group-text {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Select dropdown arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%238a8a8a' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

/* Validation */
.is-invalid {
  border-color: var(--color-danger) !important;
}

.invalid-feedback {
  color: var(--color-danger);
}

.is-valid {
  border-color: var(--color-success) !important;
}

.valid-feedback {
  color: var(--color-success);
}

/* Badges */
.badge {
  font-weight: 500;
  padding: 0.35em 0.65em;
  border-radius: var(--border-radius);
}

.bg-primary {
  background-color: var(--color-accent) !important;
}

.bg-secondary {
  background-color: var(--color-bg-elevated) !important;
  color: var(--color-text-muted) !important;
}

.bg-success {
  background-color: var(--color-success) !important;
}

.bg-danger {
  background-color: var(--color-danger) !important;
}

.bg-warning {
  background-color: var(--color-warning) !important;
  color: #000 !important;
}

.bg-info {
  background-color: var(--color-info) !important;
}

.bg-light {
  background-color: var(--color-bg-elevated) !important;
  color: var(--color-text-secondary) !important;
}

.bg-dark {
  background-color: var(--color-bg-surface) !important;
}

/* Text colors */
.text-muted {
  color: var(--color-text-muted) !important;
}

.text-dark {
  color: var(--color-text-secondary) !important;
}

.text-primary {
  color: var(--color-accent) !important;
}

.text-success {
  color: var(--color-success) !important;
}

.text-danger {
  color: var(--color-danger) !important;
}

.text-warning {
  color: var(--color-warning) !important;
}

/* Alerts */
.alert {
  border: 1px solid;
  border-radius: var(--border-radius);
}

.alert-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-info);
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn-close {
  filter: invert(1);
}

/* Tables */
.table {
  color: var(--color-text-secondary);
}

.table thead th {
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-weight: 600;
}

.table td,
.table th {
  border-color: var(--color-border);
  padding: 0.75rem 1rem;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-secondary);
  --bs-table-bg-type: transparent;
  --bs-table-color-type: var(--color-text-secondary);
}

.table-hover > tbody > tr:hover > * {
  background-color: var(--color-accent-subtle);
  color: var(--color-text);
  --bs-table-hover-bg: var(--color-accent-subtle);
  --bs-table-hover-color: var(--color-text);
}

/* Accordion */
.accordion-item {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
}

.accordion-button {
  background-color: var(--color-bg-surface);
  color: var(--color-text);
  font-weight: 500;
}

.accordion-button:not(.collapsed) {
  background-color: var(--color-accent-subtle);
  color: var(--color-text);
}

.accordion-button:focus {
  box-shadow: 0 0 0 3px var(--color-accent-glow);
  border-color: var(--color-accent);
}

.accordion-button::after {
  filter: invert(1);
}

.accordion-body {
  background-color: var(--color-bg-dark);
  color: var(--color-text-secondary);
}

/* Modal */
.modal-content {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
}

.modal-header {
  border-bottom: 1px solid var(--color-border);
}

.modal-footer {
  border-top: 1px solid var(--color-border);
}

.modal-title {
  color: var(--color-text);
}

/* Breadcrumb */
.breadcrumb {
  background-color: transparent;
  padding: 0;
}

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

.breadcrumb-item a:hover {
  color: var(--color-accent);
}

.breadcrumb-item.active {
  color: var(--color-text);
}

.breadcrumb-item + .breadcrumb-item::before {
  color: var(--color-text-dim);
}

/* Pagination */
.page-link {
  background-color: var(--color-bg-surface);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.page-link:hover {
  background-color: var(--color-bg-elevated);
  border-color: var(--color-border);
  color: var(--color-text);
}

.page-item.active .page-link {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.page-item.disabled .page-link {
  background-color: var(--color-bg-dark);
  border-color: var(--color-border);
  color: var(--color-text-dim);
}

/* List group */
.list-group-item {
  background-color: var(--color-bg-surface);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.list-group-item:hover {
  background-color: var(--color-bg-elevated);
}

.list-group-item.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===========================================
   5. Custom Components
   =========================================== */

/* Hero Section */
.hero-section {
  position: relative;
  padding: 5rem 0;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(1200px 700px at 35% 30%, var(--color-accent-glow), transparent 70%),
    radial-gradient(1000px 600px at 80% 80%, rgba(138, 118, 244, 0.08), transparent 70%);
  pointer-events: none;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 2rem;
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent), #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Accent Button (gradient) */
.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border: none;
  color: #fff;
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.75rem 2rem;
}

.btn-ghost:hover {
  border-color: var(--color-text-muted);
  background-color: var(--color-bg-elevated);
  color: var(--color-text);
}

/* Product/Library Cards */
.product-card,
.library-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.product-card:hover,
.library-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-glow);
  box-shadow: 0 8px 32px rgba(138, 118, 244, 0.15);
}

.product-card .card-img-top,
.library-card .card-img-top {
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
}

/* Price Display */
.price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.price-original {
  text-decoration: line-through;
  color: var(--color-text-dim);
  font-size: 1rem;
  font-weight: 400;
}

.price-accent {
  color: var(--color-accent);
}

/* Feature Cards */
.feature-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-accent-glow);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-subtle);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Stats Card */
.stat-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* Section Headers */
.section-header {
  margin-bottom: 3rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  max-width: 600px;
}

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: 3rem 0;
}

/* ===========================================
   6. Utilities
   =========================================== */

/* Background utilities */
.bg-dark-gradient {
  background: linear-gradient(180deg, var(--color-bg-dark), var(--color-bg-surface));
}

.bg-radial-glow {
  position: relative;
  background: radial-gradient(1400px 700px at 50% 0%, var(--color-accent-glow), transparent 70%);
}

.bg-surface {
  background-color: var(--color-bg-surface);
}

.bg-elevated {
  background-color: var(--color-bg-elevated);
}

/* Border utilities */
.border-accent {
  border-color: var(--color-accent) !important;
}

.border-glow {
  border-color: var(--color-accent-glow) !important;
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* Hover utilities */
.hover-lift {
  transition: transform var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

/* Text utilities */
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent), #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* Spacing utilities */
.section-padding {
  padding: 5rem 0;
}

.section-padding-sm {
  padding: 3rem 0;
}

/* ===========================================
   7. Footer
   =========================================== */
.footer {
  width: 100%;
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: 0.9rem 0;
  color: var(--color-text-muted);
  margin-top: auto;
  flex-shrink: 0;
}

.footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-accent);
}

/* ===========================================
   8. Identity UI Overrides
   (Account/Manage, Login, Register, etc. — ASP.NET Identity scaffold)
   =========================================== */

/* Identity pages have no outer container — give them breathing room */
main > .container,
main > div > .container {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

/* Identity Manage page heading + subtitle */
main h1 + h2,
main h2 + h2 {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

/* Hide 2FA section from the Manage nav for this release */
#two-factor,
a[id="two-factor"] {
  display: none !important;
}

/* Side-nav pills (Profile / Email / Password / etc.) */
.nav-pills .nav-link {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
  padding: 0.65rem 1rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-pills .nav-link:hover {
  background: var(--color-bg-elevated);
  border-color: var(--color-accent-glow);
  color: var(--color-text);
}

.nav-pills .nav-link.active,
.nav-pills .show > .nav-link {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark)) !important;
  border-color: var(--color-accent) !important;
  color: #fff !important;
  box-shadow: var(--shadow-glow);
}

/* Floating label inputs used throughout Identity pages */
.form-floating > .form-control,
.form-floating > .form-control-plaintext,
.form-floating > .form-select {
  background-color: var(--color-bg-input) !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-text) !important;
  border-radius: var(--border-radius);
}

.form-floating > .form-control:focus,
.form-floating > .form-select:focus {
  background-color: var(--color-bg-input) !important;
  border-color: var(--color-accent) !important;
  box-shadow: 0 0 0 3px var(--color-accent-glow) !important;
  color: var(--color-text) !important;
}

.form-floating > label {
  color: var(--color-text-muted) !important;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
  color: var(--color-accent) !important;
  background: transparent !important;
}

/* Disabled / readonly inputs (e.g., Username on Profile page) */
.form-floating > .form-control:disabled,
.form-floating > .form-control[readonly] {
  background-color: var(--color-bg-elevated) !important;
  color: var(--color-text-muted) !important;
  opacity: 0.7;
}

/* Personal Data page — Download (form) and Delete (link) side by side.
   Identity UI structure:
     <form id="download-data"><button>Download</button></form>
     <p><a id="delete">Delete</a></p>
*/
form#download-data {
  display: inline-block;
  margin-right: 0.5rem;
  margin-bottom: 0;
}

form#download-data + p {
  display: inline-block;
  margin-bottom: 0;
  vertical-align: top;
}

/* Browser autofill override — webkit fills inputs with light yellow */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px var(--color-bg-input) inset !important;
  -webkit-text-fill-color: var(--color-text) !important;
  caret-color: var(--color-text) !important;
  transition: background-color 9999s ease-in-out 0s;
}


/* ===========================================
   8. Responsive Adjustments
   =========================================== */
@media (max-width: 768px) {
  .hero-section {
    padding: 3rem 0;
  }

  .section-padding {
    padding: 3rem 0;
  }

  .section-padding-sm {
    padding: 2rem 0;
  }

  .btn-accent,
  .btn-ghost {
    padding: 0.625rem 1.5rem;
    width: 100%;
  }

  .hero-title {
    font-size: 2rem;
  }
}

@media (max-width: 576px) {
  .navbar-brand {
    font-size: 1.1rem;
  }

  .card {
    border-radius: var(--border-radius);
  }
}

/* ===========================================
   9. Animations
   =========================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--color-accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--color-accent-glow);
  }
}

.pulse-glow {
  animation: pulse-glow 2s ease-in-out infinite;
}

/* ===========================================
   10. Product Detail Pages
   =========================================== */

/* Letter-spacing utility */
.ls-wide { letter-spacing: 0.1em; }

/* Minimum height utility */
.min-vh-50 { min-height: 50vh; }

/* --- Space Reactor --- */
.sr-hero {
  position: relative;
  padding: 4rem 0 5rem;
  overflow: hidden;
}

.sr-hero-glow {
  position: absolute;
  top: -40%;
  right: 0;
  width: 60%;
  height: 140%;
  background: radial-gradient(circle, rgba(138, 118, 244, 0.18) 0%, transparent 65%);
  pointer-events: none;
}

.sr-hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.sr-screenshot-placeholder {
  background: linear-gradient(145deg, var(--color-bg-surface), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  aspect-ratio: 4 / 3;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.sr-screenshot-inner {
  text-align: center;
  color: var(--color-text-muted);
}

.sr-feature-visual {
  background: linear-gradient(145deg, var(--color-bg-surface), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-xl);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.sr-feature-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sr-feature-visual-inner {
  color: var(--color-accent);
  text-align: center;
}

/* Module Tabs */
.sr-module-tab {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 2rem;
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.6rem 1.5rem;
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}

.sr-module-tab:hover {
  border-color: var(--module-color);
  color: var(--color-text);
}

.sr-module-tab.active {
  background: var(--module-color);
  border-color: var(--module-color);
  color: #fff;
  box-shadow: 0 0 20px color-mix(in srgb, var(--module-color) 40%, transparent);
}

/* Module Panels */
.sr-module-panels {
  position: relative;
}

.sr-module-panel {
  display: none;
  animation: srFadeIn 0.35s ease;
}

.sr-module-panel.active {
  display: block;
}

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

/* Module Visual */
.sr-module-visual {
  border: 1px solid color-mix(in srgb, var(--module-color) 30%, var(--color-border));
  border-radius: var(--border-radius-xl);
  max-width: 420px;
  margin: 0 auto;
  overflow: hidden;
  box-shadow: 0 0 40px color-mix(in srgb, var(--module-color) 15%, transparent);
  transition: box-shadow var(--transition-base);
}

.sr-module-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* Preset Tags */
.sr-preset-tag {
  background: color-mix(in srgb, var(--module-color) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--module-color) 30%, transparent);
  border-radius: var(--border-radius);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
}

@media (max-width: 991px) {
  .sr-hero-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .sr-feature-visual {
    max-width: 400px;
    margin: 0 auto 2rem;
  }

  .sr-module-visual {
    max-width: 280px;
    margin-bottom: 2rem;
  }
}