/* ========================================
   Index11 - Modern Black & White Theme
   Premium Online Store UI
   ======================================== */

/* ===== CSS Variables ===== */
:root {
  --color-black: #0a0a0a;
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Outfit', sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --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);

  --container-width: 1200px;
  --header-height: 80px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-gray {
  background-color: var(--color-gray-50);
}

.section-dark {
  background-color: var(--color-black);
  color: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-badge {
  display: inline-block;
  padding: 6px 12px;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-gray-600);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-gray-500);
}

/* ===== Typography ===== */
.text-display {
  font-family: var(--font-display);
  line-height: 1.1;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-500) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-gray-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-black);
}

.btn-secondary:hover {
  background: var(--color-gray-200);
  transform: translateY(-2px);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

.header.scrolled {
  height: 70px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--color-black);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 1.25rem;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-logo-text span {
  color: var(--color-gray-400);
}

.nav-menu {
  display: flex;
  gap: 32px;
}

@media (max-width: 991px) {
  .nav-menu {
    display: none;
  }
}

.nav-menu a {
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-black);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-black);
  transition: width var(--transition-fast);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hidden-mobile {
  @media (max-width: 767px) {
    display: none;
  }
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

@media (max-width: 991px) {
  .mobile-menu-btn {
    display: flex;
  }
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-black);
  transition: all var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 100px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 991px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-text h1 span {
  color: var(--color-gray-400);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  margin-bottom: 12px;
  max-width: 500px;
}

.hero-subdesc {
  font-size: 1rem;
  color: var(--color-gray-400);
  margin-bottom: 40px;
}

@media (max-width: 991px) {

  .hero-description,
  .hero-subdesc {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

@media (max-width: 991px) {
  .hero-buttons {
    justify-content: center;
  }
}

/* ===== Hero Visual ===== */
.hero-visual {
  position: relative;
  height: 400px;
}

.status-card {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  background: var(--color-white);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-100);
  z-index: 2;
  animation: float 6s ease-in-out infinite;
}

.status-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.status-card-icon {
  width: 32px;
  height: 32px;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 60px;
}

.status-bar {
  flex: 1;
  background: var(--color-black);
  border-radius: 2px;
  opacity: 0.8;
}

.terminal-window {
  position: absolute;
  top: 80px;
  left: 20px;
  width: 320px;
  background: var(--color-gray-900);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  padding: 20px;
  z-index: 1;
  color: var(--color-gray-400);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-header {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red {
  background: #ff5f57;
}

.terminal-dot.yellow {
  background: #febc2e;
}

.terminal-dot.green {
  background: #28c840;
}

.terminal-body {
  line-height: 1.6;
}

.metrics-card {
  position: absolute;
  bottom: 20px;
  right: 40px;
  background: var(--color-white);
  padding: 16px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-gray-100);
  z-index: 3;
  animation: float 5s ease-in-out infinite reverse;
}

.metrics-header {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 0.9rem;
}

.metrics-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.1);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

/* ===== Products Grid ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  z-index: 10;
}

.product-card-image {
  height: 200px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-card-favorite {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-card-favorite:hover {
  background: var(--color-white);
  color: #ef4444;
}

.product-card-body {
  padding: 24px;
}

.product-card-category {
  font-size: 0.8rem;
  color: var(--color-gray-500);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.product-card-desc {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  margin-bottom: 24px;
  line-height: 1.6;
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid var(--color-gray-100);
}

.product-card-price {
  font-size: 1.25rem;
  font-weight: 700;
}

.product-card-price span {
  font-size: 0.8rem;
  color: var(--color-gray-500);
  font-weight: 400;
}

.product-card-btn {
  padding: 8px 16px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.product-card-btn:hover {
  background: var(--color-gray-800);
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 30px;
}

.feature-card {
  padding: 32px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-black);
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* ===== Process Section ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  counter-reset: process;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-gray-100);
  line-height: 1;
  margin-bottom: 16px;
}

.process-title {
  font-weight: 700;
  margin-bottom: 8px;
}

.process-desc {
  font-size: 0.85rem;
  color: var(--color-gray-500);
}

/* ===== Stats Section ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-gray-500);
}

/* ===== Brand Partners ===== */
.brand-partners {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  padding: 40px 0;
}

.brand-item {
  width: 100px;
  height: 60px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

.brand-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.brand-item img,
.brand-item svg {
  max-width: 60px;
  max-height: 30px;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all var(--transition-base);
}

.brand-item:hover img,
.brand-item:hover svg {
  filter: grayscale(0%);
  opacity: 1;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-black) 100%);
  color: var(--color-white);
  text-align: center;
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1.125rem;
  color: var(--color-gray-400);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===== Contact Section ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.contact-card {
  text-align: center;
  padding: 40px;
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.contact-card:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.contact-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-info {
  color: var(--color-gray-600);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: 80px 0 30px;
  font-size: 0.95rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.footer-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-white);
  color: var(--color-black);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-desc {
  color: var(--color-gray-400);
  line-height: 1.6;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-links a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  color: var(--color-gray-500);
  font-size: 0.85rem;
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
  color: var(--color-white);
}

.footer-socials a:hover {
  background: var(--color-white);
  color: var(--color-black);
}

/* ===== Mobile Footer Fixes ===== */
@media (max-width: 767px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .footer-brand {
    margin: 0 auto;
  }

  .footer-logo {
    justify-content: center;
  }

  .footer-links {
    align-items: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 {
  transition-delay: 0.1s;
}

.stagger-2 {
  transition-delay: 0.2s;
}

.stagger-3 {
  transition-delay: 0.3s;
}

.stagger-4 {
  transition-delay: 0.4s;
}

.stagger-5 {
  transition-delay: 0.5s;
}

.stagger-6 {
  transition-delay: 0.6s;
}

/* ===== Mobile Nav ===== */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1001;
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  background: var(--color-white);
  z-index: 1002;
  padding: 24px;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav-close {
  align-self: flex-end;
  background: none;
  border: none;
  cursor: pointer;
  margin-bottom: 40px;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 24px;
  font-size: 1.1rem;
  font-weight: 600;
}

.mobile-nav-buttons {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ===== Utils ===== */
.hidden-mobile {
  @media (max-width: 767px) {
    display: none;
  }
}