/* ================================================================
   HISPATUBO — Professional Design System · 2024
   ================================================================ */

/* === VARIABLES === */
:root {
  --primary-h: 39;
  --primary: hsl(var(--primary-h), 78%, 57%);
  --primary-dark: hsl(var(--primary-h), 72%, 38%);
  --primary-light: hsl(var(--primary-h), 92%, 76%);
  --primary-glow: hsla(var(--primary-h), 86%, 62%, 0.34);
  --primary-subtle: hsla(var(--primary-h), 84%, 58%, 0.12);
  --accent-h: 28;
  --accent: hsl(var(--accent-h), 78%, 44%);
  --accent-glow: hsla(var(--accent-h), 82%, 46%, 0.26);
  --surface-0: hsl(220, 17%, 5%);
  --surface-1: hsl(220, 15%, 8%);
  --surface-2: hsl(220, 12%, 12%);
  --surface-3: hsl(220, 10%, 17%);
  --surface-glass: hsla(42, 35%, 78%, 0.055);
  --border-glass: hsla(39, 62%, 68%, 0.11);
  --border-glass-hover: hsla(39, 70%, 72%, 0.24);
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --text-primary: hsl(215, 20%, 96%);
  --text-secondary: hsl(42, 15%, 68%);
  --text-muted: hsl(42, 10%, 48%);
  --space-xs: 0.5rem; --space-sm: 1rem;
  --space-md: 2rem; --space-lg: 4rem; --space-xl: 8rem;
  --radius-sm: 8px; --radius-md: 16px;
  --radius-lg: 24px; --radius-xl: 32px;
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 180ms; --dur-normal: 380ms; --dur-slow: 700ms;
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-primary);
  background-color: var(--surface-0);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* === SCROLL PROGRESS === */
#scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 9999;
  box-shadow: 0 0 12px var(--primary-glow);
}

/* === SCROLL ANIMATIONS === */
[data-animate] {
  opacity: 0; transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-animate].visible { opacity: 1; transform: translateY(0); }
[data-animate]:nth-child(2) { transition-delay: 80ms; }
[data-animate]:nth-child(3) { transition-delay: 160ms; }
[data-animate]:nth-child(4) { transition-delay: 240ms; }

/* === LAYOUT === */
.container { max-width: 1240px; margin: 0 auto; padding: 0 var(--space-md); }

/* === TYPOGRAPHY === */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 50%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--primary);
  border: 1px solid var(--primary-subtle); padding: 4px 14px; border-radius: 100px;
  margin-bottom: var(--space-sm); background: var(--primary-subtle);
}
.section-title {
  font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; margin-bottom: var(--space-sm);
}
.section-sub { font-size: 1.05rem; color: var(--text-secondary); max-width: 560px; line-height: 1.7; }
.section-header { margin-bottom: var(--space-lg); }
.section-header .section-sub { margin-top: 0.75rem; }

/* === GLASSMORPHISM === */
.glass {
  background: var(--surface-glass);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--border-glass); border-radius: var(--radius-lg);
}
.glass:hover { border-color: var(--border-glass-hover); }

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 14px 28px; border-radius: 100px; font-size: 0.95rem; font-weight: 600;
  position: relative; overflow: hidden; transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast) var(--ease-out);
  text-decoration: none; white-space: nowrap;
}
.btn::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, hsla(0,0%,100%,0.18), transparent 60%);
  opacity: 0; transition: opacity var(--dur-fast);
}
.btn:hover::after { opacity: 1; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.97); }
.btn-primary { background: linear-gradient(135deg, var(--primary-light), var(--primary), var(--primary-dark)); color: hsl(220, 17%, 8%); box-shadow: 0 4px 20px var(--primary-glow); }
.btn-primary:hover { box-shadow: 0 8px 32px var(--primary-glow); }
.btn-ghost { background: transparent; color: var(--text-primary); border: 1.5px solid var(--border-glass-hover); }
.btn-ghost:hover { background: var(--surface-glass); border-color: var(--primary); color: var(--primary-light); }
.btn-sm { padding: 10px 20px; font-size: 0.875rem; }
.btn-lg { padding: 18px 36px; font-size: 1rem; }
.btn-calc { width: 100%; justify-content: center; border-radius: var(--radius-md); padding: 16px 28px; font-size: 1rem; margin-top: var(--space-sm); }

/* === NAVBAR === */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1rem var(--space-md);
  transition: background var(--dur-normal), box-shadow var(--dur-normal), padding var(--dur-normal);
}
.navbar.scrolled {
  background: hsla(220, 17%, 5%, 0.92);
  backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border-glass); padding: 0.75rem var(--space-md);
}
.nav-container {
  max-width: 1240px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-md);
}
.nav-logo {
  display: flex; align-items: center; gap: 0.55rem; flex-shrink: 0;
  min-width: 0;
}
.logo-mark {
  width: 40px; height: 40px; flex: 0 0 40px;
  object-fit: cover; border-radius: 50%;
  filter: drop-shadow(0 0 10px hsla(38, 85%, 64%, 0.28));
}
.logo-wordmark {
  width: 214px; height: 28px; max-width: min(42vw, 214px);
  object-fit: contain; object-position: left center;
  filter: drop-shadow(0 0 8px hsla(38, 85%, 64%, 0.2));
}
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 500;
  color: var(--text-secondary); position: relative;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 2px; left: 14px; right: 14px; height: 1.5px;
  background: var(--primary); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-normal) var(--ease-out);
}
.nav-links a:hover { color: var(--text-primary); background: var(--surface-glass); }
.nav-links a:hover::after { transform: scaleX(1); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 10px; border-radius: var(--radius-sm); transition: background var(--dur-fast); }
.hamburger:hover { background: var(--surface-glass); }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform var(--dur-normal) var(--ease-spring), opacity var(--dur-fast); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  background: hsla(220, 17%, 5%, 0.97); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--border-glass); padding: var(--space-sm) var(--space-md) var(--space-md);
  animation: slideDown 0.3s var(--ease-out);
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-link { display: block; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 500; color: var(--text-secondary); transition: color var(--dur-fast), background var(--dur-fast); }
.mobile-link:hover { color: var(--text-primary); background: var(--surface-glass); }
@keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* === HERO === */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden;
  background: var(--surface-0);
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 40%, hsla(39, 86%, 58%, 0.14) 0%, transparent 60%),
              radial-gradient(ellipse 60% 50% at 80% 70%, hsla(28, 82%, 44%, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
#particles-canvas { position: absolute; inset: 0; pointer-events: none; }
.hero-deco { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.deco-tube {
  position: absolute; border-radius: 100px;
  background: linear-gradient(135deg, var(--primary-subtle), hsla(39, 86%, 58%, 0.04));
  border: 1px solid var(--border-glass);
  transition: transform 0.8s var(--ease-out);
}
.deco-tube-1 { width: 280px; height: 55px; top: 18%; right: 8%; transform: rotate(-20deg); }
.deco-tube-2 { width: 180px; height: 38px; bottom: 28%; left: 4%; transform: rotate(12deg); }
.deco-tube-3 { width: 380px; height: 75px; top: 65%; right: -3%; transform: rotate(-8deg); opacity: 0.5; }
.deco-ring { position: absolute; border-radius: 50%; border: 2px solid var(--border-glass); }
.deco-ring-1 { width: 300px; height: 300px; top: -80px; right: -80px; }
.deco-ring-2 { width: 180px; height: 180px; bottom: 12%; left: 6%; border-color: hsla(28,82%,44%,0.14); }
.hero-content {
  position: relative; z-index: 1; max-width: 820px; padding: var(--space-md);
  padding-top: 8rem; text-align: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--primary-light); margin-bottom: 1.5rem; padding: 6px 16px;
  border: 1px solid var(--border-glass); border-radius: 100px; background: var(--surface-glass);
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 var(--primary-glow); } 50% { box-shadow: 0 0 0 6px transparent; } }
.hero-title {
  font-family: var(--font-display); font-size: clamp(2.8rem, 8vw, 6.5rem); font-weight: 700;
  line-height: 0.98; letter-spacing: 0; margin-bottom: 1.5rem;
  display: flex; flex-direction: column; gap: 0.1em; align-items: center;
}
.title-line { display: block; max-width: 100%; }
.hero-sub { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-secondary); max-width: 600px; margin: 0 auto 2.5rem; line-height: 1.75; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero-badges { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 500;
  color: var(--text-muted); padding: 5px 12px; border: 1px solid var(--border-glass);
  border-radius: 100px; background: var(--surface-glass);
}
.badge-icon { color: var(--primary); font-weight: 700; }
.hero-scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text-muted); font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase;
}
.scroll-line { width: 1.5px; height: 40px; background: linear-gradient(to bottom, var(--primary), transparent); animation: scrollBounce 2s ease-in-out infinite; }
@keyframes scrollBounce { 0%, 100% { transform: scaleY(1); opacity: 1; } 50% { transform: scaleY(0.5); opacity: 0.4; } }

/* === STATS === */
.stats-section {
  padding: var(--space-lg) 0; background: var(--surface-1);
  border-top: 1px solid var(--border-glass); border-bottom: 1px solid var(--border-glass);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); text-align: center; }
.stat-item { position: relative; }
.stat-item::before { content: ''; position: absolute; left: 0; top: 20%; width: 1px; height: 60%; background: var(--border-glass); }
.stat-item:first-child::before { display: none; }
.stat-number {
  font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-suffix { font-family: var(--font-display); font-size: 1.5rem; font-weight: 600; color: var(--primary-light); vertical-align: super; }
.stat-label { font-size: 0.875rem; color: var(--text-muted); margin-top: 0.5rem; font-weight: 500; }

/* === PRODUCTS === */
.products-section { padding: var(--space-xl) 0; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 1.5rem; }
.product-card {
  padding: var(--space-md); border-radius: var(--radius-lg); position: relative; overflow: hidden;
  transition: transform var(--dur-normal) var(--ease-spring), box-shadow var(--dur-normal), border-color var(--dur-normal);
}
.product-card::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: linear-gradient(135deg, transparent 40%, hsla(0,0%,100%,0.03) 50%, transparent 60%);
  transform: translateX(-100%) rotate(45deg); transition: transform 0.65s var(--ease-out);
}
.product-card:hover { transform: translateY(-8px); box-shadow: 0 24px 64px rgba(0,0,0,0.4), 0 0 40px var(--primary-glow); border-color: hsla(39,86%,58%,0.32); }
.product-card:hover::before { transform: translateX(100%) rotate(45deg); }
.product-card-icon { width: 72px; height: 72px; margin-bottom: 1.25rem; padding: 12px; background: var(--primary-subtle); border-radius: var(--radius-md); border: 1px solid hsla(39,86%,58%,0.18); }
.product-card-icon svg { width: 100%; height: 100%; }
.product-card h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.product-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.65; margin-bottom: 1rem; }
.product-specs { display: flex; flex-direction: column; gap: 4px; margin-bottom: 1.25rem; }
.product-specs li { font-size: 0.82rem; color: var(--text-muted); padding-left: 1rem; position: relative; }
.product-specs li::before { content: '→'; position: absolute; left: 0; color: var(--primary); font-size: 0.75rem; }
.product-cta { display: inline-flex; align-items: center; gap: 6px; font-size: 0.875rem; font-weight: 600; color: var(--primary); transition: gap var(--dur-fast) var(--ease-spring), color var(--dur-fast); }
.product-cta:hover { color: var(--primary-light); gap: 10px; }

/* === CALCULATOR === */
.calculator-section { padding: var(--space-xl) 0; position: relative; overflow: hidden; background: var(--surface-1); }
.calc-bg-decoration { position: absolute; inset: 0; pointer-events: none; }
.calc-orb { position: absolute; border-radius: 50%; filter: blur(80px); }
.calc-orb-1 { width: 600px; height: 600px; background: hsla(39,86%,58%,0.07); top: -200px; left: -150px; }
.calc-orb-2 { width: 400px; height: 400px; background: hsla(28,82%,44%,0.06); bottom: -100px; right: -100px; }
.calculator-wrapper { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: start; }
.calc-card { padding: 0; overflow: hidden; border-radius: var(--radius-xl); }
.calc-shape-tabs { display: flex; border-bottom: 1px solid var(--border-glass); }
.shape-tab {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 0.45rem;
  padding: 1rem 0.75rem; font-size: 0.85rem; font-weight: 600; color: var(--text-muted);
  background: transparent; border-radius: 0; position: relative; text-align: center;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.shape-tab::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: var(--primary); transform: scaleX(0); transition: transform var(--dur-normal) var(--ease-out); }
.shape-tab:hover { color: var(--text-secondary); background: var(--surface-glass); }
.shape-tab.active { color: var(--text-primary); }
.shape-tab.active::after { transform: scaleX(1); }
.shape-tab-icon { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.shape-tab-icon svg { width: 100%; height: 100%; }
.shape-tab.active .shape-tab-icon { color: var(--primary); }
.calc-body { padding: var(--space-md); }
.calc-form { display: none; }
.calc-form.active { display: block; }
.calc-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.calc-field { display: flex; flex-direction: column; gap: 6px; }
.calc-label { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.02em; }
.input-wrap { position: relative; display: flex; align-items: center; }
.calc-input {
  width: 100%; background: var(--surface-2); border: 1.5px solid var(--border-glass);
  border-radius: var(--radius-sm); padding: 12px 48px 12px 14px; color: var(--text-primary);
  font-size: 1rem; font-weight: 500; transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
  -moz-appearance: textfield;
}
.calc-input::-webkit-inner-spin-button, .calc-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.calc-input::placeholder { color: var(--text-muted); }
.calc-input:focus { outline: none; border-color: var(--primary); background: var(--surface-3); box-shadow: 0 0 0 3px var(--primary-subtle); }
.input-unit { position: absolute; right: 12px; font-size: 0.78rem; font-weight: 600; color: var(--text-muted); pointer-events: none; }
.calc-results {
  margin-top: var(--space-md); padding: var(--space-sm); background: var(--surface-2);
  border: 1px solid var(--border-glass); border-radius: var(--radius-md);
  animation: fadeInUp 0.5s var(--ease-out);
}
@keyframes fadeInUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.results-title { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; font-weight: 600; color: var(--primary-light); margin-bottom: 1rem; }
.results-title svg { color: #22c55e; }
.results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.result-card { background: var(--surface-1); border: 1px solid var(--border-glass); border-radius: var(--radius-sm); padding: 0.75rem 1rem; }
.result-card--highlight { background: var(--primary-subtle); border-color: hsla(39,86%,58%,0.28); }
.result-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-bottom: 4px; }
.result-value { font-family: var(--font-display); font-size: 1rem; font-weight: 700; }
.result-number { font-size: 1.2rem; }
.result-total { font-size: 1.5rem; background: linear-gradient(135deg, var(--primary-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.result-norm { font-size: 0.9rem; color: var(--primary-light); }
.result-unit { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.result-disclaimer { margin-top: 0.75rem; font-size: 0.72rem; color: var(--text-muted); font-style: italic; }
.calc-error {
  margin-top: 1rem; padding: 10px 14px; background: hsla(0,80%,55%,0.1);
  border: 1px solid hsla(0,80%,55%,0.25); border-radius: var(--radius-sm);
  display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: hsl(0,80%,72%);
  animation: fadeInUp 0.3s var(--ease-out);
}
.calc-info { display: flex; flex-direction: column; gap: 1.5rem; }
.calc-info-card { padding: var(--space-md); }
.calc-info-card h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; margin-bottom: 1rem; letter-spacing: -0.01em; }
.calc-steps { display: flex; flex-direction: column; gap: 1.25rem; }
.calc-steps li { display: flex; gap: 1rem; align-items: flex-start; }
.step-num { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--primary); opacity: 0.6; min-width: 2rem; line-height: 1.3; }
.calc-steps strong { display: block; font-size: 0.9rem; margin-bottom: 2px; }
.calc-steps p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.55; }
.calc-contact-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 1rem; }

/* === SERVICES === */
.services-section { padding: var(--space-xl) 0; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.service-card { padding: var(--space-md); text-align: center; transition: transform var(--dur-normal) var(--ease-spring), border-color var(--dur-normal); }
.service-card:hover { transform: translateY(-6px); border-color: hsla(39,86%,58%,0.28); }
.service-icon { width: 64px; height: 64px; margin: 0 auto 1.25rem; padding: 14px; background: var(--primary-subtle); border: 1px solid hsla(39,86%,58%,0.18); border-radius: var(--radius-md); color: var(--primary-light); transition: background var(--dur-normal), border-color var(--dur-normal); }
.service-card:hover .service-icon { background: hsla(39,86%,58%,0.16); border-color: hsla(39,86%,58%,0.32); }
.service-icon svg { width: 100%; height: 100%; }
.service-card h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: 0.6rem; }
.service-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.65; }

/* === ABOUT === */
.about-section { padding: var(--space-xl) 0; background: var(--surface-1); border-top: 1px solid var(--border-glass); border-bottom: 1px solid var(--border-glass); }
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-lg); align-items: center; }
.about-text { font-size: 1rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 1rem; }
.about-values { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1.5rem; }
.value-item { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; font-weight: 500; }
.value-dot { width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); flex-shrink: 0; }
.about-card { padding: var(--space-md); display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.about-metric { display: flex; flex-direction: column; gap: 4px; }
.about-metric-num { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
.about-metric-label { font-size: 0.8rem; color: var(--text-muted); }

/* === CONTACT === */
.contact-section { padding: var(--space-xl) 0; }
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 2rem; align-items: start; }
.contact-card { padding: var(--space-sm); }
.contact-item { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem; border-radius: var(--radius-md); transition: background var(--dur-fast); }
.contact-item:not(.contact-item--static):hover { background: var(--surface-glass); }
.contact-item-icon { width: 40px; height: 40px; padding: 9px; background: var(--primary-subtle); border: 1px solid hsla(39,86%,58%,0.18); border-radius: 10px; color: var(--primary-light); flex-shrink: 0; }
.contact-item-icon svg { width: 100%; height: 100%; }
.contact-item-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-bottom: 2px; }
.contact-item-value { font-size: 0.9rem; font-weight: 600; }
.contact-form { padding: var(--space-md); display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-label { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); }
.form-input { background: var(--surface-2); border: 1.5px solid var(--border-glass); border-radius: var(--radius-sm); padding: 12px 16px; color: var(--text-primary); font-size: 0.95rem; transition: border-color var(--dur-fast), box-shadow var(--dur-fast); }
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-subtle); }
.form-textarea { resize: vertical; min-height: 100px; }

/* === FOOTER === */
.footer { background: var(--surface-0); border-top: 1px solid var(--border-glass); padding: var(--space-lg) 0 var(--space-md); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-md); margin-bottom: var(--space-md); padding-bottom: var(--space-md); border-bottom: 1px solid var(--border-glass); }
.footer-logo { margin-bottom: 1rem; }
.footer-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 1.25rem; }
.footer-social { display: flex; gap: 0.5rem; }
.social-link { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--border-glass); border-radius: 8px; color: var(--text-muted); transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast); }
.social-link svg { width: 16px; height: 16px; }
.social-link:hover { color: var(--text-primary); border-color: var(--primary); background: var(--primary-subtle); }
.footer-nav h4, .footer-contact h4 { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 1rem; }
.footer-nav ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-nav a { font-size: 0.9rem; color: var(--text-secondary); transition: color var(--dur-fast); }
.footer-nav a:hover { color: var(--text-primary); }
.footer-contact p { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 0.4rem; line-height: 1.6; }
.footer-contact a:hover { color: var(--primary-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--text-muted); flex-wrap: wrap; gap: 0.5rem; }
.footer-bottom a:hover { color: var(--text-primary); }

/* === RESPONSIVE === */
@media (max-width: 1100px) {
  .logo-wordmark { width: 176px; height: 23px; }
  .nav-links a { padding-inline: 10px; }
}
@media (max-width: 1024px) {
  .calculator-wrapper { grid-template-columns: 1fr; }
  .calc-info { display: grid; grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links, #nav-cta { display: none; }
  .hamburger { display: flex; }
  .logo-mark { width: 36px; height: 36px; flex-basis: 36px; }
  .logo-wordmark { width: 178px; height: 23px; max-width: 48vw; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .calc-fields { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .calc-info { grid-template-columns: 1fr; }
  .stat-item::before { display: none; }
}
@media (max-width: 480px) {
  .nav-container { gap: var(--space-sm); }
  .logo-wordmark { width: 150px; height: 20px; max-width: 52vw; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }
  .about-card { grid-template-columns: 1fr; }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }