/* ============================================================
   ESCO — Engineering Supplies Co. | Coming Soon Landing Page
   Sleek Dark Theme & Glassmorphism Design System
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Dark Theme */
  --bg-main: #050b14;
  --bg-gradient-1: #0a1930;
  --bg-gradient-2: #112240;
  
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-highlight: rgba(255, 255, 255, 0.25);
  
  --white: #FFFFFF;
  --text-main: #e6f1ff;
  --text-muted: #8892b0;
  
  --accent-cyan: #64ffda;
  --accent-blue: #0070f3;
  --accent-gold: #dba545;
  --whatsapp: #25D366;
  
  --error: #ef4444;
  --success: #10b981;

  /* Typography */
  --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Borders */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background-color: var(--bg-main);
  /* Smooth deep gradient */
  background: linear-gradient(135deg, #050b14 0%, #0c1f38 50%, #050b14 100%);
  background-size: 200% 200%;
  animation: gradientScroll 15s ease infinite;
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Glassmorphism Utility */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* --- Scroll Progress --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  z-index: 10001;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* --- Section Base --- */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
  z-index: 2;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: var(--space-md);
}

.section-label::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--accent-cyan);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-lg);
}

.section-subtext {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 650px;
  line-height: 1.7;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(5, 11, 20, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  z-index: 9100;
  text-decoration: none;
}

.header-name {
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.logo-img {
  height: 48px;
  width: auto;
  /* Magic string to convert the off-white bg logo to pure white vector on dark background */
  filter: contrast(120%) grayscale(1) invert(1) brightness(2);
  mix-blend-mode: screen;
}

/* Desktop Nav */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-base);
}

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

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

/* CTA Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent-blue), #00d2ff);
  color: var(--white);
  border: none;
  box-shadow: 0 4px 15px rgba(0, 112, 243, 0.4);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 112, 243, 0.6);
  color: var(--white);
}

.btn--whatsapp {
  background: var(--glass-bg);
  color: var(--whatsapp);
  border: 1px solid var(--whatsapp);
  backdrop-filter: blur(10px);
}

.btn--whatsapp:hover {
  background: var(--whatsapp);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.btn--glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--white);
  backdrop-filter: blur(10px);
}

.btn--glass:hover {
  background: var(--glass-bg-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  z-index: 9100;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.hamburger.active .hamburger-line:nth-child(2) { opacity: 0; }
.hamburger.active .hamburger-line:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* Mobile Nav */
.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 9050;
  background: rgba(5, 11, 20, 0.95);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.nav-mobile .nav-link {
  font-size: 1.5rem;
  letter-spacing: 0.15em;
}

/* ============================================================
   HERO & FLOATING BACKGROUND
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

/* Floating Particles Background */
#particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: var(--space-xl);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--glass-bg);
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.hero-main-logo {
  height: clamp(80px, 15vw, 150px);
  width: auto;
  margin: 0 auto var(--space-xl) auto;
  display: block;
  /* Pure white vector extraction */
  filter: contrast(120%) grayscale(1) invert(1) brightness(2);
  mix-blend-mode: screen;
}

.hero-coming-soon {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 10rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: var(--space-xl);
}

.bright-glow {
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.4), 0 0 60px rgba(100, 255, 218, 0.3);
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: var(--space-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-card {
  padding: var(--space-4xl);
  border-radius: var(--radius-lg);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.about-card .section-heading {
  margin-bottom: var(--space-xl);
}

.about-text {
  font-size: 1.25rem;
  color: var(--text-main);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.about-text-secondary {
  font-size: 1rem;
  color: var(--text-muted);
}

/* ============================================================
   PRODUCTS SECTION (3 Images)
   ============================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.products-compact {
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.product-card {
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  text-align: center;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-cyan);
  box-shadow: 0 10px 30px rgba(100, 255, 218, 0.15);
}

.product-image-container {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  position: relative;
}

.product-image-container img {
  max-height: 100%;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.5));
  transition: transform var(--transition-base);
}

.product-card:hover .product-image-container img {
  transform: scale(1.05);
}

.product-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0;
  margin-top: auto;
}

.product-card-desc {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

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

/* ============================================================
   INQUIRY FORM
   ============================================================ */
.inquiry-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-4xl);
  align-items: start;
}

.inquiry-info {
  position: sticky;
  top: calc(var(--header-height) + var(--space-2xl));
}

.inquiry-form {
  padding: var(--space-3xl);
  border-radius: var(--radius-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: var(--space-sm);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%2364ffda' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.form-select option {
  background: var(--bg-gradient-2);
  color: var(--white);
}

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

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.form-checkbox input {
  margin-top: 4px;
  accent-color: var(--accent-cyan);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.contact-card {
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-5px);
  border-color: var(--glass-border-highlight);
}

.contact-icon {
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: var(--space-lg);
}

.contact-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--white);
  margin-bottom: var(--space-xs);
}

.contact-value {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.2);
}

.footer-layout {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-logo {
  margin-bottom: var(--space-md);
}

.footer-tagline {
  color: var(--text-muted);
  max-width: 300px;
}

.footer-title {
  color: var(--white);
  font-family: var(--font-display);
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
  letter-spacing: 0.1em;
}

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

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

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

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--glass-border);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
.anim-fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.anim-delay-1 { transition-delay: 0.1s; }
.anim-delay-2 { transition-delay: 0.2s; }
.anim-delay-3 { transition-delay: 0.3s; }

@keyframes gradientScroll {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ============================================================
   FLOATING ACTIONS
   ============================================================ */
.floating-actions {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 9999;
}

.fab {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  transition: transform var(--transition-short), box-shadow var(--transition-short), border-color var(--transition-short);
}

.fab:hover {
  transform: scale(1.1);
  color: white;
}

.fab-call {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.fab-call:hover {
  box-shadow: 0 6px 20px rgba(0, 112, 243, 0.5);
  border-color: white;
}

.fab-whatsapp {
  background: var(--whatsapp);
  border-color: var(--whatsapp);
}

.fab-whatsapp:hover {
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
  border-color: white;
}

.fab svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
  .products-grid { grid-template-columns: 1fr 1fr; }
  .products-compact { grid-template-columns: repeat(3, 1fr); }
  .inquiry-layout { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-layout { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
  .products-grid, .products-compact { grid-template-columns: 1fr 1fr; }
  .footer-layout { grid-template-columns: 1fr; }
  .hero-coming-soon { font-size: clamp(3rem, 15vw, 6rem); }
  .form-row { grid-template-columns: 1fr; }
  .header-name { font-size: 1.1rem; }
}