/* style.css — Seam Design Tokens + Components */

/* =============================================
   DESIGN TOKENS
   ============================================= */

:root {
  /* --- Type Scale (fluid) --- */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* --- 4px Spacing --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* --- Fonts --- */
  --font-display: 'DM Serif Display', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* --- Radius --- */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Content widths --- */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ---- LIGHT MODE ---- */
:root, [data-theme="light"] {
  --color-bg:              #F7F8FA;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F0F2F6;
  --color-surface-offset:  #E8EBF0;
  --color-surface-offset-2:#DDE1E9;
  --color-divider:         #D0D5E0;
  --color-border:          #C5CAD6;

  --color-text:            #1A1D26;
  --color-text-muted:      #5F6680;
  --color-text-faint:      #A0A6B8;
  --color-text-inverse:    #F7F8FA;

  --color-primary:         #4B7BF5;
  --color-primary-hover:   #3A66D9;
  --color-primary-active:  #2E54B8;
  --color-primary-highlight: #E8EEFF;

  --color-success:         #4B9BE8;
  --color-success-hover:   #3A87D4;
  --color-success-active:  #2D72B8;
  --color-success-highlight: #E8F4FF;

  --color-warning:         #E8A84B;
  --color-warning-hover:   #D4943A;
  --color-warning-active:  #B87D2E;
  --color-warning-highlight: #FFF6E8;

  --color-error:           #D4735E;
  --color-error-hover:     #C0624E;
  --color-error-active:    #A8523F;
  --color-error-highlight: #FFF0EC;

  --shadow-sm: 0 1px 2px oklch(0.25 0.02 250 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.25 0.02 250 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.25 0.02 250 / 0.12);

  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);

  --dark-section-bg: #0F1729;
  --dark-section-text: #E4E7EF;
  --dark-section-muted: #8B92A8;
  --dark-glass-bg: rgba(255, 255, 255, 0.04);
  --dark-glass-border: rgba(255, 255, 255, 0.08);
}

/* ---- DARK MODE ---- */
[data-theme="dark"] {
  --color-bg:              #0A0F1A;
  --color-surface:         #0F1729;
  --color-surface-2:       #151E34;
  --color-surface-offset:  #1A2540;
  --color-surface-offset-2:#1F2C4D;
  --color-divider:         #253356;
  --color-border:          #2E3D66;

  --color-text:            #E4E7EF;
  --color-text-muted:      #8B92A8;
  --color-text-faint:      #545C78;
  --color-text-inverse:    #0F1729;

  --color-primary:         #6B96F7;
  --color-primary-hover:   #5A84E8;
  --color-primary-active:  #4B73D6;
  --color-primary-highlight: #1A2540;

  --color-success:         #6BB0F0;
  --color-success-hover:   #5A9EE0;
  --color-success-active:  #4B8CD0;
  --color-success-highlight: #121E2E;

  --color-warning:         #F0BE6B;
  --color-warning-hover:   #E0AE5A;
  --color-warning-active:  #D09E4A;
  --color-warning-highlight: #1E1A12;

  --color-error:           #E89080;
  --color-error-hover:     #D87E6E;
  --color-error-active:    #C86E5E;
  --color-error-highlight: #1E1412;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);

  --glass-bg: rgba(15, 23, 41, 0.6);
  --glass-border: rgba(46, 61, 102, 0.5);
  --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);

  --dark-section-bg: #060A14;
  --dark-section-text: #E4E7EF;
  --dark-section-muted: #8B92A8;
  --dark-glass-bg: rgba(255, 255, 255, 0.04);
  --dark-glass-border: rgba(255, 255, 255, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0A0F1A;
    --color-surface: #0F1729;
    --color-surface-2: #151E34;
    --color-surface-offset: #1A2540;
    --color-surface-offset-2: #1F2C4D;
    --color-divider: #253356;
    --color-border: #2E3D66;
    --color-text: #E4E7EF;
    --color-text-muted: #8B92A8;
    --color-text-faint: #545C78;
    --color-text-inverse: #0F1729;
    --color-primary: #6B96F7;
    --color-primary-hover: #5A84E8;
    --color-primary-active: #4B73D6;
    --color-primary-highlight: #1A2540;
    --color-success: #6BB0F0;
    --color-warning: #F0BE6B;
    --color-error: #E89080;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
    --glass-bg: rgba(15, 23, 41, 0.6);
    --glass-border: rgba(46, 61, 102, 0.5);
    --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
    --dark-section-bg: #060A14;
    --dark-section-text: #E4E7EF;
    --dark-section-muted: #8B92A8;
    --dark-glass-bg: rgba(255, 255, 255, 0.04);
    --dark-glass-border: rgba(255, 255, 255, 0.08);
  }
}


/* =============================================
   GLOBAL TYPOGRAPHY
   ============================================= */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
}

.label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}


/* =============================================
   LAYOUT
   ============================================= */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.section {
  padding: clamp(var(--space-12), 8vw, var(--space-32)) 0;
}


/* =============================================
   NAV
   ============================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) 0;
  transition: background var(--transition-interactive),
              backdrop-filter var(--transition-interactive);
}

.nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .nav-inner { padding-inline: var(--space-8); }
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.nav-logo-icon {
  display: grid;
  grid-template-columns: repeat(3, 6px);
  grid-template-rows: repeat(2, 6px);
  gap: 3px;
}

.nav-logo-icon span {
  width: 6px;
  height: 6px;
  border-radius: 1.5px;
  background: var(--color-primary);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  line-height: 1;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Nav Login */
.nav-login {
  display: none;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  min-height: 36px;
}

/* Nav CTA */
.nav-cta {
  display: none;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  min-height: 36px;
}

@media (min-width: 768px) {
  .nav-login { display: inline-flex; }
  .nav-cta { display: inline-flex; }
}

/* Theme toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile menu button */
.mobile-menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: var(--color-bg);
  padding: var(--space-20) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  transition: color var(--transition-interactive);
}

.mobile-menu a:hover {
  color: var(--color-primary);
}


/* =============================================
   BUTTONS
   ============================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
  cursor: pointer;
  min-height: 44px;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
  background: var(--color-surface-2);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary-highlight);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.text-link {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--transition-interactive);
  cursor: pointer;
}

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


/* =============================================
   GLASS CARDS
   ============================================= */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--glass-shadow);
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.glass-card-dark {
  background: var(--dark-glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--dark-glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.glass-card-dark:hover {
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}


/* =============================================
   HERO SECTION
   ============================================= */

.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--space-20);
}

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

/* Hero Video */
.hero-video-wrap {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 960px;
  margin: var(--space-12) auto var(--space-8);
  padding: 0 var(--space-4);
}

.hero-video-container {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: oklch(from var(--color-bg) calc(l - 0.03) c h / 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid oklch(from var(--color-text-primary) l c h / 0.08);
  box-shadow:
    0 4px 24px oklch(from var(--color-text-primary) l c h / 0.06),
    0 1px 2px oklch(from var(--color-text-primary) l c h / 0.04);
}

.hero-video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
}

.hero-video:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .hero-video-wrap {
    margin: var(--space-8) auto var(--space-6);
  }
}

.hero h1 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-8);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}

/* Hero gradient mesh background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  animation: float-slow 20s ease-in-out infinite;
}

.hero-bg-orb:nth-child(1) {
  width: 600px;
  height: 600px;
  background: var(--color-primary);
  top: -20%;
  right: -10%;
  animation-delay: 0s;
}

.hero-bg-orb:nth-child(2) {
  width: 400px;
  height: 400px;
  background: var(--color-success);
  bottom: -10%;
  left: -5%;
  animation-delay: -7s;
}

.hero-bg-orb:nth-child(3) {
  width: 300px;
  height: 300px;
  background: var(--color-primary);
  top: 30%;
  left: 40%;
  animation-delay: -14s;
  opacity: 0.08;
}

@keyframes float-slow {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(20px, -30px); }
  66% { transform: translate(-15px, 20px); }
}


/* =============================================
   PROBLEM SECTION
   ============================================= */

.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 768px) {
  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.problem-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.problem-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.problem-card .icon-wrap {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}


/* =============================================
   HOW IT WORKS
   ============================================= */

.how-section {
  background: var(--dark-section-bg);
  position: relative;
  overflow: hidden;
}

.how-section h2 {
  color: var(--dark-section-text);
}

.how-section .label {
  color: var(--color-primary);
}

.how-section .section-sub {
  color: var(--dark-section-muted);
}

[data-theme="dark"] .how-section {
  background: var(--color-surface);
}

[data-theme="dark"] .how-section h2 {
  color: var(--color-text);
}

[data-theme="dark"] .how-section .section-sub,
[data-theme="dark"] .how-section .section-header .section-sub {
  color: var(--color-text-muted);
}

/* Flow diagram */
.flow-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin: var(--space-10) 0;
  flex-wrap: wrap;
}

.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
  min-width: 100px;
}

.flow-node-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
}

.flow-source .flow-node-icon {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--dark-section-muted);
}

.flow-seam .flow-node-icon {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  width: 72px;
  height: 72px;
  border-radius: var(--radius-2xl);
  box-shadow: 0 0 40px rgba(75, 123, 245, 0.3);
}

.flow-result .flow-node-icon {
  background: rgba(75, 155, 232, 0.15);
  border: 1px solid rgba(75, 155, 232, 0.3);
  color: var(--color-success);
}

[data-theme="dark"] .flow-source .flow-node-icon {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--color-text-muted);
}

[data-theme="dark"] .flow-seam .flow-node-icon {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

[data-theme="dark"] .flow-result .flow-node-icon {
  background: rgba(107, 176, 240, 0.12);
  border-color: rgba(107, 176, 240, 0.25);
  color: var(--color-success);
}

.flow-node-label {
  font-size: var(--text-xs);
  color: var(--dark-section-muted);
}

[data-theme="dark"] .flow-node-label {
  color: var(--color-text-faint);
}

.flow-arrow {
  color: rgba(255, 255, 255, 0.2);
  font-size: var(--text-lg);
}

[data-theme="dark"] .flow-arrow {
  color: var(--color-text-faint);
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  padding: var(--space-6);
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-3);
  opacity: 0.5;
}

.step-card h3 {
  font-size: var(--text-lg);
  color: var(--dark-section-text);
  margin-bottom: var(--space-3);
}

[data-theme="dark"] .step-card h3 {
  color: var(--color-text);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--dark-section-muted);
  line-height: 1.7;
}

[data-theme="dark"] .step-card p {
  color: var(--color-text-muted);
}


/* =============================================
   FEATURES GRID
   ============================================= */

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.feature-card .feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}


/* =============================================
   FAMILY OFFICES (dark section)
   ============================================= */

.fo-section {
  background: var(--dark-section-bg);
  position: relative;
}

[data-theme="dark"] .fo-section {
  background: var(--color-surface);
}

.fo-section h2 {
  color: var(--dark-section-text);
}

[data-theme="dark"] .fo-section h2 {
  color: var(--color-text);
}

.fo-section .label {
  color: var(--color-primary);
}

.fo-section .section-sub {
  color: var(--dark-section-muted);
}

[data-theme="dark"] .fo-section .section-sub {
  color: var(--color-text-muted);
}

.fo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

@media (min-width: 640px) {
  .fo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .fo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.fo-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
}

.fo-item-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--color-primary);
}

.fo-item h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--dark-section-text);
  margin-bottom: var(--space-1);
}

[data-theme="dark"] .fo-item h4 {
  color: var(--color-text);
}

.fo-item p {
  font-size: var(--text-xs);
  color: var(--dark-section-muted);
  line-height: 1.6;
}

[data-theme="dark"] .fo-item p {
  color: var(--color-text-muted);
}


/* =============================================
   STACK SECTION
   ============================================= */

.stack-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-2xl);
  margin-top: var(--space-8);
}

.stack-item {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.stack-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-6);
  max-width: 600px;
  margin-inline: auto;
}


/* =============================================
   RESOURCES SECTION
   ============================================= */

.resources-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (min-width: 768px) {
  .resources-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.resource-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-8);
  text-decoration: none;
  color: inherit;
  overflow: visible;
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

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

.resource-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

.resource-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.resource-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

.resource-meta {
  display: inline-block;
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}


/* =============================================
   CTA SECTION
   ============================================= */

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

.cta-section h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-6);
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 440px;
  margin: var(--space-8) auto 0;
}

@media (min-width: 640px) {
  .cta-form {
    flex-direction: row;
  }
}

.cta-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-base);
  min-height: 48px;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.cta-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
}

.cta-input::placeholder {
  color: var(--color-text-faint);
}


/* =============================================
   FOOTER
   ============================================= */

.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

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

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  margin-top: var(--space-4);
}


/* =============================================
   SECTION HEADINGS
   ============================================= */

.section-header {
  margin-bottom: var(--space-2);
}

.section-header .label {
  margin-bottom: var(--space-3);
  display: block;
}

.section-header h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.01em;
}

.section-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 600px;
}


/* =============================================
   SCROLL ANIMATIONS
   ============================================= */

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Staggered children */
.stagger-children > * {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .stagger-children > *:nth-child(1) { animation-delay: 0ms; }
  .stagger-children > *:nth-child(2) { animation-delay: 60ms; }
  .stagger-children > *:nth-child(3) { animation-delay: 120ms; }
  .stagger-children > *:nth-child(4) { animation-delay: 180ms; }
  .stagger-children > *:nth-child(5) { animation-delay: 240ms; }
  .stagger-children > *:nth-child(6) { animation-delay: 300ms; }
}


/* =============================================
   FLOW DIAGRAM SVG ANIMATION
   ============================================= */

.flow-diagram {
  width: 100%;
  max-width: 800px;
  margin: var(--space-10) auto;
  position: relative;
}

.flow-diagram svg {
  width: 100%;
  height: auto;
}

/* Animated pulse on the Seam node */
@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.5); opacity: 0; }
}

.seam-pulse {
  animation: pulse-ring 2s cubic-bezier(0.16, 1, 0.3, 1) infinite;
  transform-origin: center;
}

/* Flowing data particles */
@keyframes data-flow {
  0% { offset-distance: 0%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}

.data-particle {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  position: absolute;
  animation: data-flow 3s linear infinite;
}