/* ============================================================
   POSEIDON GEODYNAMICS — Design System
   Dark modern aesthetic + engineering precision
   ============================================================ */

/* ─── Design Tokens ─── */
:root {
  /* Backgrounds — Dark Theme (Charcoal based) */
  --bg: #1e1e2e;
  --bg-subtle: #171724;
  --bg-card: #252538;
  --bg-glass: rgba(30, 30, 46, 0.85);
  --bg-elevated: #2a2a3f;

  /* Brand Colors — MCP Guidelines */
  --ocean-deep: #1a3a5c;
  --ocean-mid: #255282;
  --ocean-light: #3470b0;
  --teal: #2da8a0;
  --teal-bright: #39ccc3;
  --teal-glow: rgba(45, 168, 160, 0.15);
  --gold: #c9a84c;
  --gold-bright: #dec16b;
  --gold-glow: rgba(201, 168, 76, 0.15);
  --charcoal: #1e1e2e;

  /* Text — Light on Dark (Off-white based) */
  --text: #f7f8fa;
  --text-secondary: #c0c4cc;
  --text-muted: #8a8d99;
  --text-inverse: #1e1e2e;

  /* Borders & Shadows */
  --border: rgba(255, 255, 255, 0.07);
  --border-bright: rgba(255, 255, 255, 0.14);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.7);

  /* Typography */
  --font-sans:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --nav-height: 72px;
  --container-max: 1200px;
  --container-text: 800px;
  --section-padding: 120px;

  /* iOS Safe Areas */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--teal-bright);
}

ul,
ol {
  list-style: none;
}

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

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

::selection {
  background: var(--teal);
  color: white;
}

/* ─── Typography ─── */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 600;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 65ch;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--text-secondary);
  font-weight: 300;
  max-width: 600px;
}

.mono {
  font-family: var(--font-mono);
}

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

.text-center p,
.text-center .lead {
  margin-left: auto;
  margin-right: auto;
}

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

.container-narrow {
  max-width: var(--container-text);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

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

.section-dark {
  background: #0a1628;
  color: var(--text);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--text);
}

.section-dark p {
  color: var(--text-secondary);
}

.section-charcoal {
  background: var(--charcoal);
  color: var(--text);
}

/* ─── Section Headers ─── */
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 6px 14px;
  background: var(--teal-glow);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: 4px;
  font-weight: 500;
}

.section-label-gold {
  color: var(--gold);
  background: var(--gold-glow);
  border-color: rgba(240, 192, 64, 0.2);
}

.section-title {
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.section-header {
  margin-bottom: 64px;
}

/* ─── Grid System ─── */
.grid {
  display: grid;
  gap: 32px;
}

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

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

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
  padding-top: var(--safe-area-top);
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}

.nav.scrolled {
  background: rgba(6, 6, 16, 0.95);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 52px;
  width: auto;
  transition: opacity var(--transition);
}

.nav-logo-img:hover {
  opacity: 0.85;
}

.nav-logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.nav-logo-text span {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
  color: var(--teal);
  background: rgba(45, 212, 191, 0.08);
}

.nav-cta {
  flex-shrink: 0;
}

/* Mobile Menu Button */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 12px;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  align-items: center;
}

.mobile-menu span {
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
  display: block;
}

.mobile-menu.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  min-height: 44px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--teal);
  color: var(--text-inverse);
  box-shadow: 0 2px 8px rgba(45, 212, 191, 0.3);
}

.btn-primary:hover {
  background: var(--teal-bright);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45, 212, 191, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-bright);
}

.btn-secondary:hover {
  border-color: var(--teal);
  background: rgba(45, 212, 191, 0.06);
  color: var(--teal);
  transform: translateY(-2px);
}

.btn-dark {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid var(--border-bright);
}

.btn-dark:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-gold {
  background: var(--gold);
  color: var(--text-inverse);
}

.btn-gold:hover {
  background: var(--gold-bright);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.btn-white {
  background: white;
  color: #0a0a14;
}

.btn-white:hover {
  background: #e8e8f0;
  color: #0a0a14;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1rem;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-bright);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--ocean-mid));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--teal-glow);
  color: var(--teal);
  border-radius: 12px;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.card-icon-gold {
  background: var(--gold-glow);
  color: var(--gold);
}

.card-icon-blue {
  background: rgba(94, 170, 255, 0.1);
  color: var(--ocean-deep);
}

.card h3 {
  margin-bottom: 12px;
}

.card p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal);
  font-weight: 600;
  font-size: 0.875rem;
  margin-top: 20px;
  transition: gap var(--transition);
}

.card-link:hover {
  gap: 10px;
  color: var(--teal-bright);
}

.card-link::after {
  content: "\2192";
}

/* Flat card variant */
.card-flat {
  border: none;
  background: var(--bg-subtle);
  border-radius: 12px;
}

.card-flat:hover {
  transform: none;
  box-shadow: none;
  background: var(--bg-elevated);
}

.card-flat::before {
  display: none;
}

/* ─── Hero Section ─── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-height) + 60px) 24px 60px;
  background: var(--bg);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  letter-spacing: 0.08em;
  margin-bottom: 24px;
  padding: 8px 16px;
  background: var(--teal-glow);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: 100px;
  text-transform: uppercase;
}

.hero-label::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--teal);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 12px var(--teal);
  }
  50% {
    opacity: 0.5;
    box-shadow: 0 0 4px var(--teal);
  }
}

.hero h1 {
  margin-bottom: 24px;
  color: var(--text);
}

.hero-formula {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--gold);
  font-weight: 500;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.hero-formula sub {
  font-size: 0.7em;
  vertical-align: baseline;
  position: relative;
  bottom: -0.15em;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

/* Hero logo — large, centered, glowing */
.hero-logo {
  width: clamp(220px, 30vw, 340px);
  height: auto;
  margin: 0 auto 32px;
  display: block;
  filter: drop-shadow(0 0 40px rgba(45, 212, 191, 0.25))
    drop-shadow(0 0 80px rgba(45, 212, 191, 0.1));
  animation: hero-logo-in 1.2s ease-out;
}

@keyframes hero-logo-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Hero watermark — large faded logo behind content */
.hero-watermark {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-watermark img {
  width: clamp(500px, 60vw, 900px);
  height: auto;
  opacity: 0.03;
  filter: blur(1px);
}

/* CTA section watermark */
.cta-watermark {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.cta-watermark img {
  width: 240px;
  height: auto;
  opacity: 0.06;
}

/* Blog card logo images */
.blog-card-logo {
  width: 55%;
  height: auto;
  opacity: 0.25;
  transition: opacity var(--transition);
}

.blog-card:hover .blog-card-logo {
  opacity: 0.35;
}

/* About page logo showcase */
.about-logo-showcase {
  text-align: center;
  padding: 48px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.about-logo-showcase img {
  width: clamp(200px, 40vw, 320px);
  height: auto;
  margin: 0 auto;
  display: block;
}

/* Physics canvas overlay */
#physics-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: auto;
}

.hero-content {
  pointer-events: none;
}

.hero-content * {
  pointer-events: auto;
}

/* Gravity toggle button */
.gravity-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.gravity-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
  box-shadow: var(--shadow-md);
}

.gravity-btn.active {
  background: var(--teal);
  color: var(--text-inverse);
  border-color: var(--teal);
}

/* Subtle grid background for hero */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(94, 170, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 170, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(
    ellipse 80% 60% at 50% 50%,
    black 20%,
    transparent 70%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 50%,
    black 20%,
    transparent 70%
  );
  z-index: 0;
}

/* ─── Stats Bar ─── */
.stats-bar {
  background: var(--bg-subtle);
  padding: 60px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat {
  padding: 8px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--ocean-deep);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-value .gold {
  color: var(--gold);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ─── Engineering Formula Display ─── */
.formula-display {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--ocean-deep);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 32px;
  display: inline-block;
  letter-spacing: 0.02em;
  position: relative;
}

.formula-display::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
  border-radius: 12px 12px 0 0;
}

.formula-accent {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.formula-highlight {
  color: var(--gold);
  font-weight: 600;
}

/* Background formula decorations */
.formula-bg {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 6rem;
  color: rgba(94, 170, 255, 0.04);
  font-weight: 700;
  pointer-events: none;
  white-space: nowrap;
  user-select: none;
  z-index: 0;
}

/* ─── Comparison Table ─── */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.comparison-table thead th {
  background: #0a1628;
  color: var(--text);
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table thead th:first-child {
  border-radius: 12px 0 0 0;
}

.comparison-table thead th:last-child {
  border-radius: 0 12px 0 0;
}

.comparison-table tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.comparison-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table tbody tr:last-child td:first-child {
  border-radius: 0 0 0 12px;
}

.comparison-table tbody tr:last-child td:last-child {
  border-radius: 0 0 12px 0;
}

.table-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.table-wrapper table {
  min-width: 600px;
}

.check {
  color: var(--teal);
  font-weight: 700;
}

.cross {
  color: #f87171;
}

/* ─── Pricing Tables ─── */
.pricing-table {
  width: 100%;
  border-collapse: collapse;
}

.pricing-table thead th {
  background: var(--bg-subtle);
  padding: 14px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
}

.pricing-table tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.pricing-table .price {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--gold);
}

.pricing-table tbody tr:hover {
  background: rgba(45, 212, 191, 0.04);
}

.price-highlight {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--gold);
  font-size: 1.25rem;
}

.price-range {
  font-family: var(--font-mono);
  color: var(--ocean-deep);
  font-weight: 600;
}

/* ─── Tabs ─── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 40px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  padding: 14px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 44px;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeUp 0.4s ease;
}

/* ─── Badge / Tag ─── */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-teal {
  background: var(--teal-glow);
  color: var(--teal);
  border: 1px solid rgba(45, 212, 191, 0.2);
}

.badge-gold {
  background: var(--gold-glow);
  color: var(--gold);
  border: 1px solid rgba(240, 192, 64, 0.2);
}

.badge-blue {
  background: rgba(94, 170, 255, 0.1);
  color: var(--ocean-deep);
  border: 1px solid rgba(94, 170, 255, 0.15);
}

/* ─── Calculator ─── */
.calc-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.calc-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--teal),
    var(--ocean-mid),
    var(--gold)
  );
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.calc-input-group {
  margin-bottom: 24px;
}

.calc-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.calc-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text);
  transition: all var(--transition);
}

.calc-input:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-glow);
  background: var(--bg-elevated);
}

.calc-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.9375rem;
  color: var(--text);
  transition: all var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a1a1b5' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.calc-select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-glow);
}

.calc-slider {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  margin-top: 8px;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: var(--teal);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(45, 212, 191, 0.3);
}

.calc-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--teal);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

/* Calculator Results */
.calc-results {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}

.calc-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.calc-result-item:last-child {
  border-bottom: none;
}

.calc-result-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.calc-result-value {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ocean-deep);
}

.calc-result-value.gold {
  color: var(--gold);
}

.calc-result-value.teal {
  color: var(--teal);
}

.calc-result-value.pass {
  color: #34d399;
}

.calc-result-value.fail {
  color: #f87171;
}

.calc-total {
  margin-top: 20px;
  padding: 20px;
  background: #0a1628;
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.calc-total-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.calc-total-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
}

/* Mode Toggle */
.mode-toggle {
  display: flex;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 32px;
}

.mode-btn {
  flex: 1;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.mode-btn.active {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

/* ─── Forms ─── */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  color: var(--text);
  transition: all var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-glow);
  background: var(--bg-elevated);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a1a1b5' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* ─── Contact Section Layout ─── */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--teal-glow);
  color: var(--teal);
  border-radius: 10px;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
  color: var(--text);
}

.contact-info-text p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

.contact-info-text a {
  color: var(--teal);
  font-weight: 500;
}

.response-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: rgba(45, 212, 191, 0.06);
  border: 1px solid rgba(45, 212, 191, 0.15);
  border-radius: 10px;
  margin-top: 32px;
}

.response-badge span {
  font-size: 0.875rem;
  color: var(--teal);
  font-weight: 500;
}

/* ─── Blog Cards ─── */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all var(--transition);
}

.blog-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--border-bright);
}

.blog-card-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.15);
  font-size: 3rem;
}

.blog-card-body {
  padding: 28px;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.blog-card-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.blog-card h3 {
  font-size: 1.125rem;
  margin-bottom: 10px;
  color: var(--text);
  line-height: 1.4;
}

.blog-card h3 a {
  color: inherit;
  text-decoration: none;
}

.blog-card h3 a:hover {
  color: var(--teal);
}

.blog-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ─── CTA Section ─── */
.cta-section {
  background: #0a1628;
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 60% 80% at 20% 50%,
      rgba(45, 212, 191, 0.08),
      transparent 50%
    ),
    radial-gradient(
      ellipse 60% 80% at 80% 50%,
      rgba(240, 192, 64, 0.06),
      transparent 50%
    );
}

.cta-section h2 {
  color: var(--text);
  margin-bottom: 16px;
  position: relative;
}

.cta-section p {
  color: var(--text-secondary);
  margin: 0 auto 40px;
  max-width: 500px;
}

.cta-section .btn-group {
  justify-content: center;
  position: relative;
}

/* ─── Footer ─── */
.footer {
  background: var(--charcoal);
  color: var(--text);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 16px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-logo-img {
  height: auto;
  width: 200px;
  margin-bottom: 8px;
  opacity: 0.9;
  transition: opacity var(--transition);
}

.footer-logo-img:hover {
  opacity: 1;
}

.footer h4 {
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

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

/* ─── Page Header ─── */
.page-header {
  background: var(--bg-subtle);
  padding: calc(var(--nav-height) + 60px) 0 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.page-header p {
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 0.875rem;
}

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

.breadcrumb a:hover {
  color: var(--teal);
}

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

.breadcrumb .current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ─── Service Detail Blocks ─── */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 80px 0;
}

.service-block:nth-child(even) {
  direction: rtl;
}

.service-block:nth-child(even) > * {
  direction: ltr;
}

.service-block-content h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.service-block-content p {
  margin-bottom: 24px;
}

.service-block-visual {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.service-block-visual .formula-bg {
  font-size: 4rem;
}

.capability-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.capability-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text);
}

.capability-item::before {
  content: "";
  width: 20px;
  height: 20px;
  min-width: 20px;
  background: var(--teal-glow);
  border: 1px solid rgba(45, 212, 191, 0.3);
  border-radius: 50%;
  margin-top: 2px;
  position: relative;
}

.capability-item::after {
  content: "\2713";
  position: absolute;
  color: var(--teal);
  font-size: 0.7rem;
  font-weight: 700;
}

/* Simplified check items */
.check-list {
  list-style: none;
  padding: 0;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.check-list li::before {
  content: "\2713";
  color: var(--teal);
  font-weight: 700;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--teal-glow);
  border-radius: 50%;
  font-size: 0.7rem;
  margin-top: 2px;
}

/* ─── Team Section ─── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  transition: all var(--transition);
}

.team-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.team-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--ocean-deep), var(--teal));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--text-inverse);
  font-size: 1.5rem;
  font-weight: 700;
}

.team-card h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 0.875rem;
  color: var(--teal);
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0 auto;
}

/* ─── Advantage Grid ─── */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.advantage-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.advantage-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--teal-glow);
  color: var(--teal);
  border-radius: 12px;
  font-size: 1.25rem;
}

.advantage-item h4 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--text);
}

.advantage-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ─── SKU Decoder ─── */
.sku-decoder {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  font-family: var(--font-mono);
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.sku-decoder::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
}

.sku-example {
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.sku-part {
  padding: 4px 8px;
  border-radius: 4px;
  cursor: default;
}

.sku-part-type {
  background: rgba(45, 212, 191, 0.15);
  color: var(--teal-bright);
}
.sku-part-shaft {
  background: rgba(94, 170, 255, 0.15);
  color: var(--ocean-light);
}
.sku-part-helix {
  background: rgba(240, 192, 64, 0.15);
  color: var(--gold-bright);
}
.sku-part-length {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
}
.sku-part-coating {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
}

.sku-legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.875rem;
}

.sku-legend-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.sku-legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* ─── Animations ─── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

.fade-in-delay-1 {
  transition-delay: 0.1s;
}
.fade-in-delay-2 {
  transition-delay: 0.2s;
}
.fade-in-delay-3 {
  transition-delay: 0.3s;
}
.fade-in-delay-4 {
  transition-delay: 0.4s;
}

.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.stagger.visible > *:nth-child(1) {
  transition-delay: 0s;
}
.stagger.visible > *:nth-child(2) {
  transition-delay: 0.1s;
}
.stagger.visible > *:nth-child(3) {
  transition-delay: 0.2s;
}
.stagger.visible > *:nth-child(4) {
  transition-delay: 0.3s;
}

.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Utility Classes ─── */
.mt-0 {
  margin-top: 0;
}
.mt-1 {
  margin-top: 8px;
}
.mt-2 {
  margin-top: 16px;
}
.mt-3 {
  margin-top: 24px;
}
.mt-4 {
  margin-top: 32px;
}
.mt-5 {
  margin-top: 48px;
}
.mt-6 {
  margin-top: 64px;
}

.mb-0 {
  margin-bottom: 0;
}
.mb-1 {
  margin-bottom: 8px;
}
.mb-2 {
  margin-bottom: 16px;
}
.mb-3 {
  margin-bottom: 24px;
}
.mb-4 {
  margin-bottom: 32px;
}
.mb-5 {
  margin-bottom: 48px;
}
.mb-6 {
  margin-bottom: 64px;
}

.gap-sm {
  gap: 16px;
}
.gap-md {
  gap: 32px;
}
.gap-lg {
  gap: 48px;
}
.gap-xl {
  gap: 64px;
}

.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.flex-wrap {
  flex-wrap: wrap;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}

.hidden {
  display: none;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ─── Certification Grid ─── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.cert-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}

.cert-item:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-sm);
}

.cert-code {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ocean-deep);
  margin-bottom: 6px;
}

.cert-name {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ─── Spec Table ─── */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border);
  background: var(--bg-subtle);
}

.spec-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--text);
}

.spec-table .mono-cell {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.spec-table tbody tr:hover {
  background: rgba(45, 212, 191, 0.04);
}

/* ─── Timeline ─── */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--teal);
  border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 3px var(--teal-glow);
}

.timeline-item h4 {
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9375rem;
}

.timeline-step-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 4px;
}

/* ─── Dividers ─── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 60px auto;
  max-width: 600px;
}

.divider-full {
  height: 1px;
  background: var(--border);
}

/* ─── Map Placeholder ─── */
.map-placeholder {
  width: 100%;
  height: 300px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 32px;
}

/* ─── Notice Box ─── */
.notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: 10px;
  font-size: 0.9375rem;
}

.notice-info {
  background: rgba(45, 212, 191, 0.06);
  border: 1px solid rgba(45, 212, 191, 0.15);
  color: var(--teal);
}

.notice-gold {
  background: var(--gold-glow);
  border: 1px solid rgba(240, 192, 64, 0.2);
  color: var(--gold);
}

.notice-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1;
}

/* ─── Product Card ─── */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: all var(--transition);
}

.product-card:hover {
  border-color: var(--border-bright);
  box-shadow: var(--shadow-md);
}

.product-card h4 {
  margin-bottom: 12px;
  color: var(--text);
}

.product-card p {
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.product-card ul {
  list-style: none;
  padding: 0;
}

.product-card ul li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
}

.product-card ul li::before {
  content: "\2022";
  color: var(--teal);
  position: absolute;
  left: 0;
  font-weight: 700;
}

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

/* ─── Tablet (1024px) ─── */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

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

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

  .service-block {
    gap: 40px;
  }

  .contact-grid {
    gap: 40px;
  }

  .calc-grid {
    gap: 32px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* ─── Mobile (768px) ─── */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
    --nav-height: 64px;
  }

  body {
    font-size: 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(6, 6, 16, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
    font-size: 1rem;
    min-height: 44px;
  }

  .mobile-menu {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  /* Nav logo */
  .nav-logo-img {
    height: 42px;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + 40px) 20px 40px;
  }

  .hero h1 {
    font-size: clamp(2rem, 8vw, 2.75rem);
  }

  .hero-logo {
    width: clamp(180px, 50vw, 260px);
    margin-bottom: 24px;
  }

  .hero-watermark img {
    width: 80vw;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 300px;
  }

  /* CTA watermark hidden on mobile */
  .cta-watermark {
    display: none;
  }

  /* Footer logo */
  .footer-logo-img {
    width: 160px;
  }

  /* Grids */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  /* Service blocks */
  .service-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .service-block:nth-child(even) {
    direction: ltr;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Calculator */
  .calc-grid {
    grid-template-columns: 1fr;
  }

  .calc-container {
    padding: 24px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  /* Forms */
  .form-row {
    grid-template-columns: 1fr;
  }

  .form-input,
  .form-textarea,
  .form-select {
    font-size: 16px;
    min-height: 48px;
  }

  /* Buttons */
  .btn {
    min-height: 48px;
  }

  .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn-group .btn {
    width: 100%;
    max-width: 320px;
  }

  /* Tables */
  .table-wrapper {
    margin: 0 -24px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  /* Tabs */
  .tabs {
    margin: 0 -24px 40px;
    padding: 0 24px;
  }

  /* Page header */
  .page-header {
    padding: calc(var(--nav-height) + 40px) 0 40px;
  }

  /* Team */
  .team-grid {
    grid-template-columns: 1fr;
  }

  /* Blog */
  .blog-card-img {
    height: 160px;
  }
}

/* ─── Small Mobile (480px) ─── */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .card {
    padding: 24px;
  }

  .calc-container {
    padding: 20px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .sku-example {
    font-size: 1rem;
  }
}

/* ─── Print Styles ─── */
@media print {
  .nav,
  .mobile-menu,
  .gravity-btn,
  #physics-canvas,
  .footer,
  .cta-section {
    display: none !important;
  }

  body {
    color: black;
    background: white;
  }

  .section {
    padding: 20px 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  .stagger > * {
    opacity: 1;
    transform: none;
  }
}