/**
 * Indraprastha Fibers & Trades - Main Stylesheet
 * Luxury B2B Textile Platform
 */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,600&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');
@import url('design-tokens.css');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

::selection {
  background-color: var(--color-accent-gold-light);
  color: var(--color-text-primary);
}

/* ==========================================================================
   Typography & Hierarchy
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.75rem);
  font-weight: var(--fw-regular);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h3 {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
}

h4 {
  font-size: clamp(1.25rem, 1.8vw, 1.65rem);
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

p {
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.text-lead {
  font-size: clamp(1.1rem, 1.4vw, 1.35rem);
  color: var(--color-text-primary);
  font-weight: var(--fw-light);
  line-height: 1.6;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--color-accent-gold-dark);
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-accent-gold);
}

.eyebrow-light {
  color: var(--color-accent-gold);
}
.eyebrow-light::before {
  background-color: var(--color-accent-gold);
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

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

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

/* Custom 8xl Container for Navbar */
.container-8xl {
  width: 100%;
  max-width: 96rem; /* Adjust if your design token for 8xl differs (e.g. 88rem to 96rem) */
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding-top: clamp(4rem, 8vw, 7.5rem);
  padding-bottom: clamp(4rem, 8vw, 7.5rem);
  position: relative;
}

.section-dark {
  background-color: var(--color-dark-bg);
  color: var(--color-text-inverse);
}
.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-text-inverse);
}
.section-dark p {
  color: var(--color-text-inverse-muted);
}

.section-alt {
  background-color: var(--color-bg-secondary);
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-header.text-center {
  text-align: center;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.section-header.text-center .eyebrow::before {
  margin-right: 0;
}
.section-header.text-center .eyebrow::after {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-accent-gold);
}

.section-title {
  margin-top: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: clamp(1.05rem, 1.25vw, 1.2rem);
  color: var(--color-text-secondary);
  max-width: 680px;
}
.section-dark .section-subtitle {
  color: var(--color-text-inverse-muted);
}

/* ==========================================================================
   Buttons & Interactive UI
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 1.875rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-radius: var(--radius-xs);
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-text-primary);
  color: var(--color-bg-primary);
  border: 1px solid var(--color-text-primary);
}
.btn-primary:hover {
  background-color: var(--color-accent-gold-dark);
  border-color: var(--color-accent-gold-dark);
  color: #FFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-gold {
  background-color: var(--color-accent-gold);
  color: #121316;
  border: 1px solid var(--color-accent-gold);
}
.btn-gold:hover {
  background-color: #B59568;
  border-color: #B59568;
  color: #FFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.btn-outline-gold {
  background-color: transparent;
  color: var(--color-accent-gold);
  border: 1px solid var(--color-accent-gold-border);
}
.btn-outline-gold:hover {
  background-color: var(--color-accent-gold);
  color: #121316;
  border-color: var(--color-accent-gold);
  transform: translateY(-2px);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--color-text-inverse);
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-outline-light:hover {
  background-color: var(--color-text-inverse);
  color: var(--color-text-primary);
  border-color: var(--color-text-inverse);
  transform: translateY(-2px);
}

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-medium);
}
.btn-outline-dark:hover {
  background-color: var(--color-text-primary);
  color: var(--color-bg-primary);
  border-color: var(--color-text-primary);
  transform: translateY(-2px);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-primary);
  padding: 0;
  border-bottom: 1.5px solid var(--color-accent-gold);
  padding-bottom: 2px;
  transition: all var(--transition-fast);
}
.btn-link:hover {
  color: var(--color-accent-gold-dark);
  gap: var(--space-sm);
  border-color: var(--color-text-primary);
}

.btn-link-light {
  color: var(--color-accent-gold);
  border-bottom-color: var(--color-accent-gold);
}
.btn-link-light:hover {
  color: #FFF;
  border-bottom-color: #FFF;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.top-bar {
  background-color: var(--color-dark-surface);
  color: var(--color-text-inverse-muted);
  font-size: 0.8125rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--color-dark-border);
  transition: all var(--transition-fast);
}

/* Updated to use max-w-8xl container */
.top-bar .container,
.top-bar .container-8xl {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-bar-tagline {
  letter-spacing: var(--tracking-wide);
  font-weight: var(--fw-light);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-inverse-muted);
  transition: color var(--transition-fast);
}
.top-bar-item:hover {
  color: var(--color-accent-gold);
}

.top-bar-item svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Main Header */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background-color: rgba(251, 249, 246, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(251, 249, 246, 0.97);
  box-shadow: var(--shadow-sm);
  padding: 0.4rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  transition: padding var(--transition-normal);
}

.site-header.scrolled .header-inner {
  padding: 0.45rem 0;
}

/* Brand Logo */
.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-fast);
}
.brand-logo-wrap:hover .brand-logo-img {
  transform: scale(1.02);
}

/* Navigation Menu */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-primary);
  padding: 0.5rem 0;
  position: relative;
  display: inline-block;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-gold-dark);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent-gold-dark);
}

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

/* Header Dropdown */
.nav-item-has-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: var(--color-bg-card);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xs);
  padding: var(--space-xs) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 10;
}

.nav-item-has-dropdown:hover .dropdown-menu,
.nav-item-has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.65rem 1.25rem;
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-accent-gold-dark);
  padding-left: 1.5rem;
}

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

.btn-header-rfq {
  padding: 0.65rem 1.25rem;
  font-size: 0.8125rem;
}

/* Mobile Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  padding: 0;
  position: relative;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  z-index: calc(var(--z-drawer) + 1);
}

.mobile-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  position: relative;
  transition: all var(--transition-normal);
}

.mobile-nav-toggle span::before,
.mobile-nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  transition: all var(--transition-normal);
}

.mobile-nav-toggle span::before {
  top: -8px;
}

.mobile-nav-toggle span::after {
  bottom: -8px;
}

.mobile-nav-toggle.active span {
  background-color: transparent;
}
.mobile-nav-toggle.active span::before {
  transform: translateY(8px) rotate(45deg);
}
.mobile-nav-toggle.active span::after {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 380px);
  height: 100vh;
  background-color: var(--color-bg-primary);
  box-shadow: var(--shadow-dark-md);
  z-index: var(--z-drawer);
  padding: var(--space-3xl) var(--space-xl) var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right var(--transition-normal);
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: calc(var(--z-drawer) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.mobile-drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-primary);
  display: block;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-link.active {
  color: var(--color-accent-gold-dark);
}

.mobile-drawer-contact {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  font-size: 0.9rem;
}

/* ==========================================================================
   Page Hero Banners (Sub-pages)
   ========================================================================== */
.page-hero {
  position: relative;
  background-color: var(--color-dark-bg);
  color: var(--color-text-inverse);
  padding-top: clamp(4.5rem, 8vw, 7.5rem);
  padding-bottom: clamp(4.5rem, 8vw, 7.5rem);
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.38;
  transform: scale(1.03);
  transition: transform var(--transition-slow);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 14, 17, 0.85) 0%, rgba(13, 14, 17, 0.95) 100%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.page-hero-title {
  color: var(--color-text-inverse);
  margin-bottom: var(--space-md);
}

.page-hero-desc {
  font-size: clamp(1.05rem, 1.35vw, 1.25rem);
  color: var(--color-text-inverse-muted);
  font-weight: var(--fw-light);
  max-width: 720px;
  line-height: 1.7;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8125rem;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-md);
}

.breadcrumb-nav a {
  color: var(--color-text-inverse-muted);
}
.breadcrumb-nav a:hover {
  color: var(--color-accent-gold);
}

/* ==========================================================================
   Global Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-dark-bg);
  color: var(--color-text-inverse-muted);
  padding-top: clamp(4rem, 7vw, 6rem);
  border-top: 1px solid var(--color-dark-border);
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.4fr;
  gap: clamp(2rem, 4vw, 4rem);
  padding-bottom: clamp(3rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--color-dark-border);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-logo {
  height: 42px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-tagline {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-inverse-muted);
  max-width: 360px;
}

.footer-col-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-lg);
  position: relative;
  padding-bottom: var(--space-xs);
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-accent-gold-border);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: 0.9rem;
  color: var(--color-text-inverse-muted);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
}
.footer-link:hover {
  color: var(--color-accent-gold);
  transform: translateX(4px);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  font-size: 0.9rem;
}

.footer-contact-item {
  display: flex;
  gap: var(--space-sm);
  color: var(--color-text-inverse-muted);
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: var(--color-accent-gold);
  margin-top: 3px;
}

.footer-bottom {
  padding: var(--space-xl) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-legal-links {
  display: flex;
  gap: var(--space-lg);
}

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

/* ==========================================================================
   Utility & Scroll Reveal Animations
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}