/* ===================================
   GOLDEN AGE GEARS - MASTER STYLESHEET
   Premium Design System
   =================================== */

:root {
  /* Light Theme (Default) */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-tertiary: #e8eef0;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-border: #ddd;
  --color-accent: #d4af37;
  --color-accent-dark: #cc9900;
  --color-primary: #2a4d3e;
  --color-primary-light: #3a6d4e;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-md: rgba(0, 0, 0, 0.12);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Grid */
  --grid-gap: 24px;
  --grid-gap-mobile: 8px;
  --grid-gap-tablet: 16px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50%;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Segoe UI', 'Helvetica Neue', sans-serif;
  --font-mono: 'Courier New', monospace;
  --line-height-body: 1.65;
  --line-height-heading: 1.25;

  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark Theme */
html[data-theme="dark"] {
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #252525;
  --color-bg-tertiary: #303030;
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #ccc;
  --color-text-muted: #999;
  --color-border: #444;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-shadow-md: rgba(0, 0, 0, 0.5);
}

/* ===================================
   GLOBAL STYLES
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: var(--line-height-body);
  transition: background-color var(--transition-base), color var(--transition-base);
  padding-top: 70px;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: var(--line-height-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] h4,
html[data-theme="dark"] h5,
html[data-theme="dark"] h6 {
  color: var(--color-accent);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; margin: var(--spacing-2xl) 0 var(--spacing-lg); }
h3 { font-size: 1.8rem; margin: var(--spacing-lg) 0 var(--spacing-md); }
h4 { font-size: 1.5rem; margin: var(--spacing-md) 0 var(--spacing-sm); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
  background-color: var(--color-primary);
  border: none;
  box-shadow: 0 2px 8px var(--color-shadow-md);
  padding: 0;
}

.navbar-default {
  background-color: var(--color-primary);
  border-color: transparent;
}

.navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff !important;
  letter-spacing: -0.02em;
}

.navbar-nav > li > a {
  color: #fff !important;
  transition: color var(--transition-fast);
  font-weight: 500;
}

.navbar-nav > li > a:hover {
  color: var(--color-accent) !important;
}

.navbar-nav > li.active > a {
  color: var(--color-accent) !important;
  background-color: transparent;
}

.navbar-toggle {
  background-color: transparent;
  border: none;
}

.navbar-toggle .icon-bar {
  background-color: #fff;
  transition: background-color var(--transition-fast);
}

.navbar-toggle:hover .icon-bar {
  background-color: var(--color-accent);
}

/* ===================================
   THEME & LANGUAGE CONTROLS
   =================================== */

.control-bar {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.theme-toggle,
.lang-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover,
.lang-toggle:hover {
  color: var(--color-accent);
  transform: scale(1.15);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--color-shadow-md);
  margin-top: var(--spacing-sm);
  z-index: 1000;
  display: none;
  min-width: 120px;
}

.lang-dropdown.active {
  display: block;
}

.lang-option {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
}

.lang-option:hover,
.lang-option.active {
  background-color: var(--color-bg-secondary);
  color: var(--color-accent);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero-section {
  position: relative;
  width: 100%;
  min-height: 550px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary);
  opacity: 0.4;
  z-index: 1;
}

.hero-section img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  filter: brightness(0.5);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--spacing-2xl);
  color: #fff;
  animation: fadeInUp 0.8s ease-out;
}

.hero-content h1 {
  font-size: 3.5rem;
  color: #fff;
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
  letter-spacing: -0.03em;
}

.hero-content p {
  font-size: 1.3rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-xl);
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

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

.btn {
  padding: 12px 28px;
  font-size: 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
  letter-spacing: 0.5px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: #fff;
  border-color: #fff;
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-ghost {
  background-color: transparent;
  border: 2px solid #fff;
  color: #fff;
}

.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.9rem;
}

/* ===================================
   BENTO GRID SYSTEM
   =================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

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

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

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

.grid-item-span-2 {
  grid-column: span 2;
}

.grid-item-span-3 {
  grid-column: span 3;
}

.grid-item-tall {
  grid-row: span 2;
}

/* Asymmetrical Grid for Featured Items */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  margin: var(--spacing-2xl) 0;
}

.bento-item {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.bento-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px var(--color-shadow-md);
  border-color: var(--color-accent);
}

.bento-item.wide {
  grid-column: span 2;
}

.bento-item.tall {
  grid-row: span 2;
}

.bento-item-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.bento-item:hover .bento-item-image {
  transform: scale(1.05);
}

.bento-item-content {
  padding: var(--spacing-lg);
}

.bento-item h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.bento-item p {
  margin-bottom: var(--spacing-md);
}

/* ===================================
   PRODUCT CARDS
   =================================== */

.product-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 32px var(--color-shadow-md);
  border-color: var(--color-accent);
}

.product-card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.product-card:hover .product-card-image {
  transform: scale(1.08);
}

.product-card-body {
  padding: var(--spacing-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.product-card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.3rem;
}

.product-card p {
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.product-card .spec {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
}

.product-card .btn {
  margin-top: auto;
}

/* ===================================
   VALUE PROPS & FEATURES
   =================================== */

.value-prop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--grid-gap);
  margin: var(--spacing-2xl) 0;
}

.value-prop-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.value-prop-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px var(--color-shadow-md);
  border-color: var(--color-accent);
}

.value-prop-item svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  fill: var(--color-accent);
  transition: transform var(--transition-base);
}

.value-prop-item:hover svg {
  transform: scale(1.15) rotate(5deg);
}

.value-prop-item h4 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

.value-prop-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ===================================
   TESTIMONIALS
   =================================== */

.testimonial-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  box-shadow: 0 8px 20px var(--color-shadow-md);
  border-color: var(--color-accent);
}

.testimonial-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  margin: 0 auto var(--spacing-lg);
  border: 3px solid var(--color-accent);
  object-fit: cover;
  transition: transform var(--transition-base);
}

.testimonial-card:hover .testimonial-avatar {
  transform: scale(1.1) rotate(-3deg);
}

.testimonial-text {
  font-size: 1rem;
  font-style: italic;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.testimonial-author {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.testimonial-location {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===================================
   FORMS
   =================================== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

input,
textarea,
select {
  width: 100%;
  padding: 12px var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

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

/* ===================================
   FOOTER
   =================================== */

footer {
  background-color: var(--color-primary);
  color: #fff;
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
  transition: background-color var(--transition-base);
}

footer h4 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
  font-size: 1.2rem;
}

footer a {
  color: #fff;
  text-decoration: none;
}

footer a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

footer p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-md);
}

footer address {
  color: rgba(255, 255, 255, 0.8);
  font-style: normal;
}

.footer-section {
  margin-bottom: var(--spacing-lg);
}

.footer-divider {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
}

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

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

/* Stagger animations */
.stagger-item {
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
}

.stagger-item:nth-child(1) { animation-delay: 0.1s; }
.stagger-item:nth-child(2) { animation-delay: 0.2s; }
.stagger-item:nth-child(3) { animation-delay: 0.3s; }
.stagger-item:nth-child(4) { animation-delay: 0.4s; }
.stagger-item:nth-child(5) { animation-delay: 0.5s; }
.stagger-item:nth-child(6) { animation-delay: 0.6s; }

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

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .bento-item.wide {
    grid-column: span 1;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-content p {
    font-size: 1.1rem;
  }
}

@media (max-width: 768px) {
  :root {
    --grid-gap: var(--grid-gap-tablet);
  }

  body {
    padding-top: 60px;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }

  .grid,
  .grid-2,
  .grid-3,
  .grid-4,
  .bento-grid,
  .value-prop-grid {
    grid-template-columns: 1fr;
  }

  .bento-item.wide,
  .bento-item.tall,
  .grid-item-span-2,
  .grid-item-span-3 {
    grid-column: span 1;
    grid-row: auto;
  }

  .control-bar {
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    margin-top: var(--spacing-md);
  }

  .hero-section {
    min-height: 400px;
  }

  .hero-content {
    padding: var(--spacing-lg);
  }

  .hero-content h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
  }

  .hero-content p {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
  }

  .hero-content .btn {
    display: block;
    width: 100%;
    margin-bottom: var(--spacing-md);
  }

  .testimonial-card {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 576px) {
  :root {
    --grid-gap: var(--grid-gap-mobile);
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .navbar-brand {
    font-size: 1.2rem;
  }

  .control-bar {
    gap: var(--spacing-xs);
  }

  .theme-toggle,
  .lang-toggle {
    padding: 6px;
    font-size: 1.1rem;
  }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }
.p-5 { padding: var(--spacing-2xl); }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.section-padding {
  padding: var(--spacing-2xl) 0;
}

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

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

.border-top {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
}

/* Glassmorphism effect */
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

html[data-theme="dark"] .glass {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

/* Visible on mobile only */
.visible-mobile { display: none; }

@media (max-width: 768px) {
  .visible-mobile { display: block; }
  .hidden-mobile { display: none; }
}

/* Cookie Consent */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-lg) var(--spacing-md);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  animation: slideInUp 0.3s ease-out;
}

@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

.cookie-consent.hidden {
  display: none;
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: var(--spacing-md);
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}