/* ============================================
   Enigma Vault Marketing Site
   ============================================ */

/* --- Design Tokens --- */
:root {
  --color-primary: #0078e7;
  --color-primary-dark: #005bb5;
  --color-primary-light: #129fea;
  --color-accent: #00c6ff;
  --color-dark: #0b1222;
  --color-dark-soft: #131d33;
  --color-dark-card: #182240;
  --color-text: #c8d6e5;
  --color-text-bright: #ffffff;
  --color-text-muted: #8899aa;
  --color-border: #1e3050;
  --color-success: #00d97e;
  --color-warning: #f5a623;
  --color-gradient-start: #0b1222;
  --color-gradient-end: #0f1d36;

  --font-stack: "Inter", "Segoe UI", FreeSans, Arimo, "Droid Sans", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(0, 120, 231, 0.15);

  --max-width: 1200px;
  --nav-height: 72px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-stack);
  background: var(--color-dark);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  color: var(--color-text-bright);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary-light);
  margin-bottom: var(--space-sm);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header p {
  max-width: 640px;
  margin: var(--space-sm) auto 0;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-bright);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-text-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 120, 231, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-bright);
  border: 2px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.875rem;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(11, 18, 34, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-bright);
}

.nav-logo:hover {
  color: var(--color-text-bright);
}

.nav-logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-bright);
  border-bottom-color: var(--color-primary);
}

.nav-cta {
  margin-left: var(--space-sm);
}

.nav-cta .btn {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  padding: 0.55rem 1.5rem;
}

.nav-cta .btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text-bright);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* --- Hero --- */
.hero {
  padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 120, 231, 0.12) 0%, transparent 60%),
              var(--color-dark);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 120, 231, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  margin-bottom: var(--space-md);
  position: relative;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto var(--space-lg);
  line-height: 1.6;
}

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

/* --- Trust Bar --- */
.trust-bar {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-dark-soft);
}

.trust-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.trust-item svg {
  width: 28px;
  height: 28px;
  color: var(--color-success);
  flex-shrink: 0;
}

/* --- Features --- */
.features {
  padding: var(--space-2xl) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(0, 120, 231, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--color-primary-light);
}

.feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  margin-bottom: var(--space-xs);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 0.3rem 0;
  font-size: 0.9rem;
  color: var(--color-text);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.feature-list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
  margin-top: 0.55rem;
  flex-shrink: 0;
}

/* --- How It Works --- */
.how-it-works {
  padding: var(--space-2xl) 0;
  background: var(--color-dark-soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  top: 44px;
  left: calc(16.67% + 24px);
  right: calc(16.67% + 24px);
  height: 2px;
  background: var(--color-border);
}

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

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 auto var(--space-md);
  position: relative;
  z-index: 1;
}

.step h3 {
  margin-bottom: var(--space-xs);
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* --- Security --- */
.security {
  padding: var(--space-2xl) 0;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.security-item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.security-item svg {
  width: 24px;
  height: 24px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.security-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.security-item p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* --- Pricing --- */
.pricing {
  padding: var(--space-2xl) 0;
  background: var(--color-dark-soft);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: start;
}

.pricing-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-bright);
  padding: 0.25rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-bright);
  margin: var(--space-sm) 0;
}

.pricing-card .price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-card .price-note {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--space-lg);
}

.pricing-features li {
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid rgba(30, 48, 80, 0.5);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* --- Developer Experience --- */
.developer {
  padding: var(--space-2xl) 0;
}

.developer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.developer-text h2 {
  margin-bottom: var(--space-sm);
}

.developer-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
}

.sdk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.sdk-tag {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  background: rgba(0, 120, 231, 0.1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  color: var(--color-primary-light);
  font-weight: 500;
}

.code-block {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.code-dot:nth-child(1) { background: #ff5f57; }
.code-dot:nth-child(2) { background: #febc2e; }
.code-dot:nth-child(3) { background: #28c840; }

.code-body {
  padding: 1.25rem;
  overflow-x: auto;
}

.code-body pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text);
}

.code-body .kw { color: #c792ea; }
.code-body .str { color: #c3e88d; }
.code-body .fn { color: #82aaff; }
.code-body .cm { color: #546e7a; }
.code-body .num { color: #f78c6c; }

/* --- Footer --- */
.footer {
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-dark);
}

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

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: var(--space-sm);
  max-width: 300px;
}

.footer h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

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

/* --- Product Showcase (Homepage) --- */
.product-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.product-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  transition: opacity var(--transition);
}

.product-card--api::before {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.product-card--customer::before {
  background: linear-gradient(90deg, #00d97e, #00c6ff);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.product-card--api:hover {
  border-color: var(--color-primary);
}

.product-card--customer:hover {
  border-color: #00d97e;
}

.product-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.product-card--api .product-card-icon {
  background: rgba(0, 120, 231, 0.12);
  color: var(--color-primary-light);
}

.product-card--customer .product-card-icon {
  background: rgba(0, 217, 126, 0.12);
  color: #00d97e;
}

.product-card-icon svg {
  width: 32px;
  height: 32px;
}

.product-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.product-card > p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.product-card .feature-list {
  margin-bottom: var(--space-lg);
  flex: 1;
}

.product-card .feature-list li {
  font-size: 0.95rem;
  padding: 0.4rem 0;
}

.product-card .btn {
  align-self: flex-start;
}

/* --- Subpage Hero --- */
.hero--subpage {
  padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-xl);
}

.hero--subpage h1 {
  font-size: clamp(2rem, 4vw, 3rem);
}

/* --- Platform Stats --- */
.platform-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

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

.stat-number {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--color-text-bright);
  line-height: 1.2;
}

.stat-number span {
  color: var(--color-primary-light);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* --- CTA Banner --- */
.cta-banner {
  padding: var(--space-xl) 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 120, 231, 0.08) 0%, rgba(0, 198, 255, 0.05) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-banner h2 {
  margin-bottom: var(--space-sm);
}

.cta-banner p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto var(--space-md);
}

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

/* --- Contact Section --- */
.contact {
  padding: var(--space-xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-text h2 {
  margin-bottom: var(--space-sm);
}

.contact-text > p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.contact-details {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-details li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.contact-details li svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-primary-light);
}

.contact-details li a {
  color: var(--color-text-muted);
}

.contact-details li a:hover {
  color: var(--color-primary-light);
}

.contact-form {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

/* --- Features Grid Variants --- */
.features-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

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

/* --- Pricing Tabs --- */
.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--space-lg);
}

.pricing-tab {
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-stack);
}

.pricing-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-text-bright);
}

.pricing-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-bright);
}

.pricing-panel {
  display: none;
}

.pricing-panel.active {
  display: block;
}

.pricing-custom {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-md);
}

.pricing-custom h3 {
  margin-bottom: var(--space-xs);
}

.pricing-custom p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

/* --- Video Grid --- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.video-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.video-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-card h3 {
  font-size: 1.05rem;
  padding: var(--space-sm) var(--space-md) 0;
}

.video-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 0.25rem var(--space-md) var(--space-md);
  line-height: 1.5;
}

/* --- Customer Vault accent overrides --- */
.accent-green .feature-icon {
  background: rgba(0, 217, 126, 0.1);
  color: #00d97e;
}

.accent-green .feature-card::before {
  background: linear-gradient(90deg, #00d97e, #00c6ff);
}

.accent-green .step-number {
  background: #00d97e;
}

.accent-green .section-label {
  color: #00d97e;
}

/* --- Why Not Email? Section --- */
.why-not-email {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, rgba(0, 217, 126, 0.04) 0%, rgba(0, 198, 255, 0.02) 100%);
}

.why-not-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.why-not-col {
  background: var(--color-dark-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.why-not-col h3 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.15rem;
  margin-bottom: var(--space-md);
}

.why-not-col h3 svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.why-not-col ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.why-not-col ul li {
  font-size: 1rem;
  line-height: 1.5;
  padding-left: 1.5rem;
  position: relative;
}

.why-not-col ul li::before {
  position: absolute;
  left: 0;
  font-weight: 700;
}

.why-not-col--problem {
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.why-not-col--problem h3 {
  color: #ef4444;
}

.why-not-col--problem h3 svg {
  color: #ef4444;
}

.why-not-col--problem ul li {
  color: var(--color-text-muted);
}

.why-not-col--problem ul li::before {
  content: "\2717";
  color: #ef4444;
}

.why-not-col--solution {
  border: 1px solid rgba(0, 217, 126, 0.3);
}

.why-not-col--solution h3 {
  color: #00d97e;
}

.why-not-col--solution h3 svg {
  color: #00d97e;
}

.why-not-col--solution ul li {
  color: var(--color-text-bright);
}

.why-not-col--solution ul li::before {
  content: "\2713";
  color: #00d97e;
}

/* --- Use Case Grid (Customer Vault) --- */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.use-case-card {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition);
}

.use-case-card:hover {
  border-color: #00d97e;
  transform: translateY(-4px);
  box-shadow: 0 0 30px rgba(0, 217, 126, 0.1);
}

.use-case-card.accent-blue:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 30px rgba(0, 120, 231, 0.15);
}

.use-case-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.use-case-icon svg {
  width: 22px;
  height: 22px;
}

.use-case-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.use-case-card p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* --- Card Vault Demo --- */
.demo-container {
  max-width: 480px;
  margin: 0 auto;
}

.demo-status {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: var(--space-md);
}

.demo-status--error {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.demo-status--error code {
  background: rgba(239, 68, 68, 0.15);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

.demo-frame-wrapper {
  background: var(--color-dark-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.demo-frame-wrapper iframe {
  width: 100%;
  height: 250px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-dark-card);
  margin-bottom: var(--space-md);
}

.demo-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.demo-response {
  margin-top: var(--space-lg);
}

.demo-response h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-xs);
}

.demo-response > p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.demo-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: var(--space-lg);
}

.demo-note a {
  color: var(--color-primary-light);
}

/* --- Mobile Responsive --- */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card:last-child {
    grid-column: span 2;
    max-width: 400px;
    margin: 0 auto;
  }

  .developer-content {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(11, 18, 34, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    gap: 0;
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--space-sm);
  }

  .nav-toggle {
    display: block;
  }

  .features-grid,
  .steps,
  .security-grid,
  .pricing-grid,
  .product-showcase,
  .features-grid--2col,
  .features-grid--4col,
  .video-grid,
  .use-case-grid,
  .why-not-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .platform-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .pricing-card:last-child {
    grid-column: auto;
    max-width: none;
  }

  .steps::before {
    display: none;
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-xl));
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}