/* ==========================================================================
   FAILSAFE STUDIO — Swiss Modernist Design System
   Architecture: Pure Semantic Modular CSS with CSS Custom Properties
   ========================================================================== */

/* --- 1. Design Tokens & Theme Variables --- */

/* 1. Base / Light Mode Baseline */
:root,
html[data-theme="light"],
body[data-theme="light"] {
  color-scheme: light;
  
  --bg-primary: #fbfbfd;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f4f4f6;
  --bg-surface-glass: rgba(251, 251, 253, 0.88);
  --bg-surface-hover: #ebebee;
  
  --border-hairline: rgba(0, 0, 0, 0.08);
  --border-subtle: rgba(0, 0, 0, 0.14);
  --border-focus: #0a0a0c;
  
  --text-primary: #0a0a0c;
  --text-secondary: #525866;
  --text-muted: #868c98;
  --text-inverse: #ffffff;
  
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-glow: rgba(37, 99, 235, 0.12);
  
  --status-live: #10b981;
  --status-beta: #3b82f6;
  --status-dev: #f59e0b;
  --status-lock: #6b7280;

  /* Typography Scale */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  
  --font-size-2xs: 0.6875rem; /* 11px */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.75rem;   /* 44px */
  --font-size-5xl: 3.5rem;    /* 56px */

  /* Spacing & Layout */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem; /* 20px */
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --max-width-container: 1200px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px 0 rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.1);
  --shadow-header: 0 4px 20px -2px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. System OS Dark Preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]),
  body:not([data-theme="light"]) {
    color-scheme: dark;
    
    --bg-primary: #0a0a0c;
    --bg-surface: #121316;
    --bg-surface-elevated: #1a1b1f;
    --bg-surface-glass: rgba(10, 10, 12, 0.85);
    --bg-surface-hover: #22242a;
    
    --border-hairline: rgba(255, 255, 255, 0.08);
    --border-subtle: rgba(255, 255, 255, 0.14);
    --border-focus: #f5f5f7;
    
    --text-primary: #f5f5f7;
    --text-secondary: #a1a6b0;
    --text-muted: #6b7280;
    --text-inverse: #0a0a0c;
    
    --accent-primary: #3b82f6;
    --accent-primary-hover: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.18);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.6);
    --shadow-header: 0 4px 24px -2px rgba(0, 0, 0, 0.6);
  }
}

/* 3. Explicit User Dark Mode */
html[data-theme="dark"],
body[data-theme="dark"] {
  color-scheme: dark !important;
  
  --bg-primary: #0a0a0c !important;
  --bg-surface: #121316 !important;
  --bg-surface-elevated: #1a1b1f !important;
  --bg-surface-glass: rgba(10, 10, 12, 0.85) !important;
  --bg-surface-hover: #22242a !important;
  
  --border-hairline: rgba(255, 255, 255, 0.08) !important;
  --border-subtle: rgba(255, 255, 255, 0.14) !important;
  --border-focus: #f5f5f7 !important;
  
  --text-primary: #f5f5f7 !important;
  --text-secondary: #a1a6b0 !important;
  --text-muted: #6b7280 !important;
  --text-inverse: #0a0a0c !important;
  
  --accent-primary: #3b82f6 !important;
  --accent-primary-hover: #60a5fa !important;
  --accent-glow: rgba(59, 130, 246, 0.18) !important;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.6);
  --shadow-header: 0 4px 24px -2px rgba(0, 0, 0, 0.6);
}

/* 4. Explicit User Light Mode (Overrides everything with absolute precedence) */
html[data-theme="light"],
body[data-theme="light"] {
  color-scheme: light !important;
  
  --bg-primary: #fbfbfd !important;
  --bg-surface: #ffffff !important;
  --bg-surface-elevated: #f4f4f6 !important;
  --bg-surface-glass: rgba(251, 251, 253, 0.88) !important;
  --bg-surface-hover: #ebebee !important;
  
  --border-hairline: rgba(0, 0, 0, 0.08) !important;
  --border-subtle: rgba(0, 0, 0, 0.14) !important;
  --border-focus: #0a0a0c !important;
  
  --text-primary: #0a0a0c !important;
  --text-secondary: #525866 !important;
  --text-muted: #868c98 !important;
  --text-inverse: #ffffff !important;
  
  --accent-primary: #2563eb !important;
  --accent-primary-hover: #1d4ed8 !important;
  --accent-glow: rgba(37, 99, 235, 0.12) !important;
  
  --status-live: #10b981;
  --status-beta: #3b82f6;
  --status-dev: #f59e0b;
  --status-lock: #6b7280;

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px 0 rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.1);
  --shadow-header: 0 4px 20px -2px rgba(0, 0, 0, 0.06);
}

/* --- 2. Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Scroll Margins for Sticky Fixed Header */
:target,
section[id],
main[id],
article[id],
div[id] {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

/* Accessible Skip to Content Link */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 10001;
  padding: 0.75rem 1.25rem;
  background-color: var(--accent-primary);
  color: #ffffff !important;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transition: top 0.2s ease-in-out;
}

.skip-to-content:focus,
.skip-to-content:focus-visible {
  top: 1rem;
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

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

/* --- 3. Typography & Utility --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.15;
}

p {
  color: var(--text-secondary);
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: var(--max-width-container);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* --- 4. Sticky Fixed Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-hairline);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
}

.site-header.scrolled {
  border-bottom-color: var(--border-subtle);
  box-shadow: var(--shadow-header);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.brand-logo-svg {
  width: 32px;
  height: 32px;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-link:hover .brand-logo-svg {
  transform: rotate(-3deg) scale(1.04);
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: var(--font-size-base);
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.brand-name span.light {
  font-weight: 300;
  color: var(--text-muted);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent-primary);
  text-transform: uppercase;
}

/* Desktop Navigation */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
  position: relative;
  padding: var(--space-1) 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 1.5px;
  background-color: var(--text-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-hairline);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

/* Sun/Moon visibility:
   - In Light Mode: Show MOON icon (Action: switch to dark)
   - In Dark Mode: Show SUN icon (Action: switch to light)
*/
.icon-moon {
  display: block;
}
.icon-sun {
  display: none;
}

html[data-theme="dark"] .icon-moon {
  display: none;
}
html[data-theme="dark"] .icon-sun {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-moon {
    display: none;
  }
  :root:not([data-theme="light"]) .icon-sun {
    display: block;
  }
}

/* Primary Store Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--text-primary);
  color: var(--text-inverse);
  font-size: var(--font-size-sm);
  font-weight: 700;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  letter-spacing: -0.01em;
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: transparent;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

/* Mobile Menu Hamburger Toggle */
.mobile-toggle-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-toggle-btn svg {
  width: 24px;
  height: 24px;
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-hairline);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-6);
  z-index: 999;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-link {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-hairline);
}

/* --- 5. Main Layout Framework --- */
.main-content {
  flex: 1;
  padding-top: var(--header-height);
}

/* Hero Section */
.hero-section {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  border-bottom: 1px solid var(--border-hairline);
  position: relative;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: 32px 32px;
  background-image: 
    linear-gradient(to right, var(--border-hairline) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-hairline) 1px, transparent 1px);
  opacity: 0.6;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
}

.hero-headline {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  max-width: 900px;
}

.hero-subhead {
  font-size: clamp(1.125rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
  margin-bottom: var(--space-8);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* --- 6. Product Showcase Section --- */
.section-wrapper {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  border-bottom: 1px solid var(--border-hairline);
}

.section-header {
  margin-bottom: var(--space-12);
}

.section-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: block;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 620px;
}

/* Product Cards Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-6);
}

.product-grid:focus-visible {
  outline: none;
}

.product-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-md);
}

.product-card-top {
  margin-bottom: var(--space-6);
}

.product-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.status-pill.live {
  background: rgba(16, 185, 129, 0.12);
  color: var(--status-live);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.status-pill.beta {
  background: rgba(59, 130, 246, 0.12);
  color: var(--status-beta);
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.status-pill.dev {
  background: rgba(245, 158, 11, 0.12);
  color: var(--status-dev);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.status-pill.security {
  background: rgba(168, 85, 247, 0.12);
  color: #a855f7;
  border: 1px solid rgba(168, 85, 247, 0.25);
}

.category-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.product-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.product-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.product-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.product-tagline {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: var(--space-4);
}

/* Feature Spec Pills */
.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.feature-pill {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Product Card Actions */
.product-card-bottom {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--space-4);
}

.btn-card-action {
  flex: 1;
  text-align: center;
}


/* --- 7. About The Studio & Web Engineering Credentials --- */
.about-featured-banner {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.about-featured-header {
  margin-bottom: var(--space-3);
}

.about-featured-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-2);
  margin-bottom: var(--space-3);
}

.about-featured-copy {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 860px;
  margin-bottom: var(--space-6);
}

.about-featured-action {
  display: flex;
  align-items: center;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}

.about-pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
}

.about-pillar-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.about-pillar-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- 9. Contact Form & Inquiries Section --- */
.contact-form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-hairline);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Honeypot Spam Trap */
.studio-trap-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* Form Alert Banners */
.form-alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
  display: none;
  align-items: center;
  gap: var(--space-3);
}

.form-alert.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--status-live);
}

.form-alert.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

/* --- 10. Site Footer --- */
.site-footer {
  border-top: 1px solid var(--border-hairline);
  background: var(--bg-surface);
  padding: var(--space-12) 0 var(--space-8) 0;
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 320px;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-heading {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--space-6);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-1);
}

.footer-brand-svg {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  color: var(--text-primary);
}

/* --- 11. Responsive Breakpoints --- */
@media (max-width: 860px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle-btn {
    display: block;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-featured-banner {
    padding: var(--space-5);
  }
  .contact-form-card {
    padding: var(--space-5);
  }
}