/* ============================================================
   TAAPE — Site Styles
   site.css
   ============================================================ */

/* ─────────────────────────────────────────────
   Ambient Background
───────────────────────────────────────────── */
.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: orbFloat 8s var(--ease-in-out) infinite alternate;
}

.ambient__orb--1 {
  width: 600px;
  height: 600px;
  top: -20%;
  left: -10%;
  background: radial-gradient(circle, rgba(255, 122, 24, 0.18) 0%, transparent 70%);
  animation-delay: 0s;
  animation-duration: 12s;
}

.ambient__orb--2 {
  width: 500px;
  height: 500px;
  bottom: -15%;
  right: -8%;
  background: radial-gradient(circle, rgba(249, 211, 66, 0.12) 0%, transparent 70%);
  animation-delay: 3s;
  animation-duration: 10s;
}

.ambient__orb--3 {
  width: 400px;
  height: 400px;
  top: 40%;
  left: 40%;
  background: radial-gradient(circle, rgba(255, 93, 71, 0.08) 0%, transparent 70%);
  animation-delay: 5s;
  animation-duration: 14s;
}

@keyframes orbFloat {
  0%   { opacity: 1; transform: translate(0, 0) scale(1); }
  33%  { transform: translate(20px, -30px) scale(1.05); }
  66%  { transform: translate(-15px, 20px) scale(0.97); }
  100% { transform: translate(10px, -10px) scale(1.02); }
}

.ambient__grain {
  position: absolute;
  inset: -200%;
  width: 400%;
  height: 400%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
}

/* ─────────────────────────────────────────────
   Site Header & Navigation
───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(11, 13, 18, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-base), border-color var(--duration-base);
}

.site-header.scrolled {
  background: rgba(11, 13, 18, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-8);
  height: 100%;
}

.nav__brand {
  display: flex;
  align-items: center;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-text);
  position: relative;
  line-height: 1.1;
}

.nav__logo--lockup {
  display: inline-flex;
  flex-direction: column;
  gap: 0.04rem;
  letter-spacing: 0;
}

.nav__logo-primary,
.nav__logo-secondary {
  display: block;
}

.nav__logo-primary {
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.nav__logo-secondary {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.nav__logo::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav__brand:hover .nav__logo::after {
  transform: scaleX(1);
}

.nav__links {
  display: flex;
  justify-content: center;
  gap: var(--space-1);
}

.nav__link {
  padding: var(--space-2) var(--space-4);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-pill);
  transition: color var(--duration-base), background var(--duration-base);
}

.nav__link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

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

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  transition: border-color var(--duration-base), background var(--duration-base);
}

.nav__hamburger:hover {
  border-color: var(--color-border-hover);
  background: rgba(255,255,255,0.07);
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-fast);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Nav Panel */
.mobile-nav {
  display: none;
  overflow: hidden;
  max-height: 0;
  border-bottom: 1px solid transparent;
  background: rgba(11, 13, 18, 0.96);
  backdrop-filter: blur(20px);
  transition: max-height var(--duration-slow) var(--ease-out), border-color var(--duration-base);
}

.mobile-nav.is-open {
  max-height: 400px;
  border-bottom-color: var(--color-border);
}

.mobile-nav ul {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-5);
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast), background var(--duration-fast);
}

.mobile-nav a:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.04);
}

/* ─────────────────────────────────────────────
   Hero Section
───────────────────────────────────────────── */
.hero {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-24);
  min-height: 100svh;
  display: flex;
  align-items: center;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero__content {
  max-width: 640px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(3.45rem, 6.7vw, 6.2rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  max-width: 11ch;
  margin-bottom: var(--space-5);
}

.hero__sub {
  font-size: 1.1rem;
  line-height: 1.72;
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-bottom: var(--space-7);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-7);
}

.hero__proof-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-border);
}

.hero__proof-item {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  white-space: nowrap;
}

.hero__proof-divider {
  width: 18px;
  height: 1px;
  background: rgba(255, 122, 24, 0.32);
  flex-shrink: 0;
}

/* Hero Visual */
.hero__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  justify-content: center;
  align-items: center;
}

.hero__card-stack {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.hero__visual-copy {
  width: 100%;
  max-width: 500px;
}

.hero__visual-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.75rem;
  border: 1px solid rgba(255, 122, 24, 0.18);
  border-radius: 999px;
  background: rgba(255, 122, 24, 0.08);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  box-shadow: var(--shadow-xl);
  transition: transform var(--duration-slow) var(--ease-out);
}

.hero__card--back {
  position: relative;
  z-index: 1;
  transform: rotate(-1.5deg) translateY(6px);
  opacity: 0.7;
  background: var(--color-surface-2);
}

.hero__card--front {
  position: relative;
  z-index: 2;
  margin-top: -80px;
}

.hero__card-stack:hover .hero__card--back {
  transform: rotate(-2.5deg) translateY(12px);
  opacity: 0.8;
}

/* Waveform visualization */
.waveform {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 64px;
  margin-bottom: var(--space-4);
}

.waveform__bar {
  flex: 1;
  height: var(--h, 50%);
  background: var(--gradient-gold);
  border-radius: 3px;
  opacity: 0.6;
  animation: waveAnim 1.6s ease-in-out infinite alternate;
  animation-delay: calc(var(--i, 0) * 80ms);
}

.waveform__bar:nth-child(1)  { animation-delay: 0ms; }
.waveform__bar:nth-child(2)  { animation-delay: 80ms; }
.waveform__bar:nth-child(3)  { animation-delay: 160ms; }
.waveform__bar:nth-child(4)  { animation-delay: 240ms; }
.waveform__bar:nth-child(5)  { animation-delay: 320ms; }
.waveform__bar:nth-child(6)  { animation-delay: 400ms; }
.waveform__bar:nth-child(7)  { animation-delay: 480ms; }
.waveform__bar:nth-child(8)  { animation-delay: 560ms; }
.waveform__bar:nth-child(9)  { animation-delay: 640ms; }
.waveform__bar:nth-child(10) { animation-delay: 720ms; }
.waveform__bar:nth-child(11) { animation-delay: 640ms; }
.waveform__bar:nth-child(12) { animation-delay: 560ms; }
.waveform__bar:nth-child(13) { animation-delay: 480ms; }
.waveform__bar:nth-child(14) { animation-delay: 400ms; }
.waveform__bar:nth-child(15) { animation-delay: 320ms; }
.waveform__bar:nth-child(16) { animation-delay: 240ms; }
.waveform__bar:nth-child(17) { animation-delay: 160ms; }
.waveform__bar:nth-child(18) { animation-delay: 80ms; }
.waveform__bar:nth-child(19) { animation-delay: 0ms; }
.waveform__bar:nth-child(20) { animation-delay: 80ms; }

@keyframes waveAnim {
  0%   { transform: scaleY(0.4); opacity: 0.4; }
  100% { transform: scaleY(1);   opacity: 0.9; }
}

.hero__card-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

/* Signal display card */
.signal-display {}

.signal-display__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.signal-display__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-subtle);
}

.signal-display__dot--active {
  background: #22c55e;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 8px rgba(34, 197, 94, 0.6); }
  50%       { box-shadow: 0 0 16px rgba(34, 197, 94, 0.9); }
}

.signal-display__title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.signal-display__chain {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.chain-node {
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.chain-node--accent {
  background: var(--color-accent-dim);
  border-color: rgba(255, 122, 24, 0.3);
  color: var(--color-accent);
}

.chain-arrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-subtle);
}

.signal-display__meters {
  display: grid;
  gap: var(--space-2);
}

.meter {
  display: grid;
  grid-template-columns: 16px 1fr 48px;
  align-items: center;
  gap: var(--space-3);
}

.meter__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-subtle);
}

.meter__bar {
  height: 4px;
  background: var(--color-surface-3);
  border-radius: 4px;
  overflow: hidden;
}

.meter__fill {
  height: 100%;
  width: var(--w, 50%);
  background: var(--gradient-gold);
  border-radius: 4px;
  animation: meterPulse 2.5s ease-in-out infinite alternate;
}

.meter__fill:nth-child(1) { animation-delay: 0s; }
.meter__fill:nth-child(2) { animation-delay: 0.3s; }

@keyframes meterPulse {
  0%   { opacity: 0.7; }
  100% { opacity: 1; }
}

.meter__val {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-align: right;
}

.hero__visual-caption {
  width: 100%;
  max-width: 500px;
  margin: 0;
  color: var(--color-text-subtle);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-subtle);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  animation: scrollHintFade 1.5s ease-out 1.5s both;
}

.scroll-hint__line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-text-subtle), transparent);
  animation: scrollLine 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes scrollHintFade {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ─────────────────────────────────────────────
   Marquee Strip
───────────────────────────────────────────── */
.marquee-strip {
  overflow: hidden;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  width: max-content;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
}

.marquee-track span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.marquee-dot {
  color: var(--color-accent) !important;
  font-size: 0.6rem !important;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ─────────────────────────────────────────────
   Philosophy / Brand Section
───────────────────────────────────────────── */
.section-split {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: var(--space-16);
  align-items: start;
  margin-bottom: var(--space-16);
}

.section-split__lead .section-title {
  max-width: 20ch;
}

.section-split__body {
  padding-top: var(--space-8);
}

.section-split__body p + p {
  margin-top: var(--space-4);
}

/* Trait Cards */
.trait-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.trait-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition:
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
  cursor: default;
}

.trait-card:hover {
  border-color: rgba(255, 122, 24, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.trait-card__icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent-dim);
  border: 1px solid rgba(255, 122, 24, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.trait-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.trait-card__body {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────────────
   System Grid
───────────────────────────────────────────── */
.system-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-4);
}

.system-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  transition:
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    background var(--duration-base);
  text-decoration: none;
  overflow: hidden;
}

.system-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-subtle);
  opacity: 0;
  transition: opacity var(--duration-slow);
}

.system-card:hover {
  border-color: rgba(255, 122, 24, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.45);
  background: var(--color-surface);
}

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

.system-card--featured {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-8);
}

.system-card--featured .system-card__icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  margin-bottom: 0;
}

.system-card--featured .system-card__title {
  font-size: 1.5rem;
}

.system-card__badge {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-dim);
  border: 1px solid rgba(255, 122, 24, 0.3);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.system-card__icon {
  width: 48px;
  height: 48px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  transition: background var(--duration-base), border-color var(--duration-base), color var(--duration-base);
  flex-shrink: 0;
}

.system-card:hover .system-card__icon {
  background: var(--color-accent-dim);
  border-color: rgba(255, 122, 24, 0.3);
  color: var(--color-accent);
}

.system-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.system-card__body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-6);
}

.system-card__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
  transition: gap var(--duration-fast);
}

.system-card:hover .system-card__cta {
  gap: var(--space-3);
}

/* ─────────────────────────────────────────────
   Process Flow
───────────────────────────────────────────── */
.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr) ;
  align-items: start;
  gap: 0;
  position: relative;
}

.process-step {
  padding: var(--space-6);
  position: relative;
}

.process-step::before {
  content: '';
  position: absolute;
  top: 28px;
  right: -1px;
  width: 1px;
  height: 48px;
  background: var(--color-border);
}

.process-step:last-child::before {
  display: none;
}

.process-connector {
  display: none;
}

.process-step__number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.process-step__number::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.process-step__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.process-step__body {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────────────
   Guides Section
───────────────────────────────────────────── */
.guides-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-10);
  gap: var(--space-6);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  gap: var(--space-4);
}

.guide-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  transition:
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
  text-decoration: none;
}

.guide-card:hover {
  border-color: rgba(255, 122, 24, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.guide-card--wide {
  grid-column: 1 / -1;
}

.guide-card__category {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-3);
}

.guide-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.guide-card__body {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-5);
}

.guide-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.guide-card__tag {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

/* ─────────────────────────────────────────────
   Stats Strip
───────────────────────────────────────────── */
.stats-strip {
  padding: var(--space-16) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.stat-item__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--color-border);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   CTA Block
───────────────────────────────────────────── */
.cta-block {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-16) var(--space-12);
  text-align: center;
  overflow: hidden;
}

.cta-block__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 122, 24, 0.12) 0%,
    transparent 65%
  );
  pointer-events: none;
}

.cta-block__content {
  position: relative;
  z-index: 1;
}

.cta-block__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.cta-block__sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 50ch;
  margin: 0 auto var(--space-8);
}

.cta-block__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ─────────────────────────────────────────────
   Footer
───────────────────────────────────────────── */
.site-footer {
  padding: var(--space-16) 0 var(--space-10);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
  align-items: start;
}

.footer-brand__logo {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer-brand__tagline {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  max-width: 36ch;
  margin-bottom: var(--space-3);
}

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  font-size: 0.84rem;
  color: var(--color-text-muted);
  opacity: 0.92;
  transition: color var(--duration-fast), opacity var(--duration-fast);
  margin-bottom: var(--space-3);
}

.footer-brand__link:hover,
.footer-brand__link:focus-visible {
  color: var(--color-text);
  opacity: 1;
}

.footer-brand__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.footer-nav__heading {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-4);
}

.footer-nav ul {
  display: grid;
  gap: var(--space-3);
}

.footer-nav a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer-bottom__copy,
.footer-bottom__version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
}

/* ─────────────────────────────────────────────
   Responsive — Tablet (≤ 900px)
───────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero__content {
    max-width: 100%;
  }

  .hero__visual {
    justify-content: flex-start;
    align-items: flex-start;
  }

  .hero__card-stack {
    max-width: 460px;
  }

  .section-split {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .section-split__body {
    padding-top: 0;
  }

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

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

  .system-card--featured {
    flex-direction: column;
  }

  .process-flow {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .process-step::before {
    display: none;
  }

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

  .guide-card--wide {
    grid-column: 1 / -1;
  }

  .stats-grid {
    gap: var(--space-8);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .cta-block {
    padding: var(--space-12) var(--space-8);
  }
}

/* ─────────────────────────────────────────────
   Responsive — Mobile (≤ 640px)
───────────────────────────────────────────── */
@media (max-width: 640px) {
  :root {
    --nav-height: 60px;
  }

  .section { padding: var(--space-16) 0; }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .mobile-nav { display: block; }

  .nav {
    gap: var(--space-4);
  }

  .nav__brand {
    max-width: min(62vw, 240px);
  }

  .nav__logo {
    font-size: 0.72rem;
    letter-spacing: 0.03em;
  }

  .nav__logo-primary {
    font-size: 0.78rem;
  }

  .nav__logo-secondary {
    font-size: 0.56rem;
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-10));
    min-height: auto;
    padding-bottom: var(--space-16);
  }

  .hero__title {
    font-size: clamp(2.8rem, 12vw, 4rem);
  }

  .hero__actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .hero__proof-strip {
    gap: var(--space-2);
    align-items: flex-start;
  }

  .hero__proof-divider {
    display: none;
  }

  .hero__proof-item {
    width: 100%;
  }

  .hero__visual {
    display: flex;
    justify-content: center;
    margin-top: var(--space-2);
    order: 2;
    align-items: center;
  }

  .hero__card-stack {
    width: 100%;
    max-width: 360px;
  }

  .hero__card {
    padding: var(--space-5);
  }

  .hero__card--back {
    inset: -12px 12px 12px -12px;
  }

  .signal-display__chain {
    gap: var(--space-2);
    padding: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
  }

  .chain-node {
    min-width: 76px;
    padding: var(--space-3) var(--space-3);
    font-size: 0.95rem;
  }

  .chain-arrow {
    font-size: 0.9rem;
  }

  .hero__visual-kicker,
  .hero__visual-caption {
    max-width: 360px;
  }

  .meter {
    grid-template-columns: 20px 1fr 52px;
    gap: var(--space-3);
  }

  .meter__val {
    font-size: 0.9rem;
  }

  .scroll-hint { display: none; }

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

  .process-flow {
    grid-template-columns: 1fr;
  }

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

  .guides-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-grid {
    flex-direction: column;
    gap: var(--space-6);
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .footer-nav {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }

  .cta-block {
    padding: var(--space-10) var(--space-6);
  }

  .cta-block__title {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }

  .section-header {
    margin-bottom: var(--space-10);
  }
}