/* ============================================================================
   THE ENGLISH DOJO — Landing page styles
   Theme: "Sumi & Shu" (Ink & Vermilion)
   ----------------------------------------------------------------------------
   Organisation:
     1. Design tokens (:root)        ← single source of truth, maps to Tailwind
     2. Reset & base
     3. Layout primitives
     4. Components (buttons, badges, cards…)
     5. Sections (header, hero, path, method…)
     6. Animations & motion
     7. Responsive
   All tokens live in :root so a future Next.js/Tailwind port can lift them
   straight into tailwind.config + globals.css. See STYLEGUIDE.md.
   ========================================================================== */

/* ============================ 1. DESIGN TOKENS ============================ */
:root {
  /* — Brand: Vermilion / Shu (朱) — the torii-gate red ------------------- */
  --color-vermilion-50:  #fbeeec;
  --color-vermilion-100: #f6d6d1;
  --color-vermilion-200: #ecaaa1;
  --color-vermilion-300: #e08374;
  --color-vermilion-400: #d65c49;
  --color-vermilion-500: #c0352b; /* primary brand accent */
  --color-vermilion-600: #a52c23;
  --color-vermilion-700: #84231d;

  /* — Ink / Sumi (墨) — warm near-black for text & dark surfaces --------- */
  --color-ink-900: #17150f;
  --color-ink-800: #211e16;
  --color-ink-700: #343024;
  --color-ink-600: #56503f;
  --color-ink-500: #756e5b; /* muted body text */
  --color-ink-400: #9b9483;

  /* — Paper / Washi (和紙) — warm off-white backgrounds ------------------ */
  --color-paper-50:  #fcfaf5; /* page background */
  --color-paper-100: #f6f1e7; /* alt section background */
  --color-paper-200: #ece4d4; /* hairline borders */
  --color-paper-300: #ddd2bb; /* stronger borders */

  /* — Gold / Brass (真鍮) — secondary accent, achievement --------------- */
  --color-gold-400: #d9b34a;
  --color-gold-500: #c4972a;
  --color-gold-600: #a37c1f;

  /* — Belt ranks (used for the progression motif) ----------------------- */
  --belt-white:  #f3ede0;
  --belt-yellow: #e8c84b;
  --belt-green:  #4f9d6b;
  --belt-blue:   #3f6bb0;
  --belt-brown:  #8a5a33;
  --belt-black:  #221f18;

  /* — Semantic aliases (use these in components) ------------------------ */
  --bg:            var(--color-paper-50);
  --bg-alt:        var(--color-paper-100);
  --surface:       #ffffff;
  --border:        var(--color-paper-200);
  --border-strong: var(--color-paper-300);
  --text:          var(--color-ink-900);
  --text-muted:    var(--color-ink-500);
  --text-soft:     var(--color-ink-600);
  --primary:       var(--color-vermilion-500);
  --primary-hover: var(--color-vermilion-600);
  --primary-tint:  var(--color-vermilion-50);
  --on-primary:    #fdf6f4;
  --ring:          color-mix(in srgb, var(--primary) 45%, transparent);

  /* — Typography -------------------------------------------------------- */
  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-jp: "Noto Serif JP", "Fraunces", serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --leading-tight: 1.12;
  --leading-snug:  1.3;
  --leading-normal: 1.65;

  /* — Spacing scale (Tailwind-aligned, 0.25rem base) -------------------- */
  --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;

  /* — Radii ------------------------------------------------------------- */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.75rem;
  --radius-full: 9999px;

  /* — Shadows (warm, ink-tinted) ---------------------------------------- */
  --shadow-xs: 0 1px 2px rgba(23, 21, 15, 0.06);
  --shadow-sm: 0 2px 6px rgba(23, 21, 15, 0.07);
  --shadow-md: 0 8px 24px rgba(23, 21, 15, 0.09);
  --shadow-lg: 0 18px 44px rgba(23, 21, 15, 0.12);
  --shadow-xl: 0 30px 70px rgba(23, 21, 15, 0.16);

  /* — Layout ------------------------------------------------------------ */
  --container: 1180px;
  --container-pad: 1.5rem;
  --header-h: 4.5rem;

  /* — Motion ------------------------------------------------------------ */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 140ms;
  --dur: 240ms;
  --dur-slow: 520ms;
}

/* ============================ 2. RESET & BASE ============================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background-color: var(--bg);
  /* faint asanoha-inspired paper texture, kept extremely subtle */
  background-image:
    radial-gradient(circle at 1px 1px, rgba(23, 21, 15, 0.022) 1px, transparent 0);
  background-size: 22px 22px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--text);
}

input {
  font: inherit;
}

::selection {
  background: var(--color-vermilion-200);
  color: var(--color-ink-900);
}

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--text);
  color: var(--bg);
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus {
  top: 1rem;
}

/* ============================ 3. LAYOUT PRIMITIVES ============================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

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

.section__head {
  max-width: 46rem;
  margin-inline: auto;
  text-align: center;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section__head--left {
  margin-inline: 0;
  text-align: left;
}

.section__kicker {
  display: inline-block;
  font-family: var(--font-jp);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: clamp(var(--text-3xl), 4.5vw, var(--text-5xl));
  font-optical-sizing: auto;
}

.section__lede {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
  color: var(--text-soft);
  line-height: var(--leading-normal);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-soft);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xs);
}
.eyebrow__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-full);
  background: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-tint);
}

/* ============================ 4. COMPONENTS ============================ */

/* — Icons ------------------------------------------------------------- */
.icon {
  width: 1.15em;
  height: 1.15em;
  stroke-width: 2;
  flex: none;
}
.icon--sm {
  width: 1em;
  height: 1em;
}
/* Lucide injects <svg>; normalise sizing */
[data-lucide] {
  width: 1.25rem;
  height: 1.25rem;
  stroke-width: 2;
}

/* — Buttons ----------------------------------------------------------- */
.btn {
  --btn-py: 0.7rem;
  --btn-px: 1.15rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-base);
  line-height: 1;
  padding: var(--btn-py) var(--btn-px);
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  transition: transform var(--dur-fast) var(--ease),
    background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:active {
  transform: translateY(1px) scale(0.99);
}
.btn .icon,
.btn [data-lucide] {
  width: 1.1em;
  height: 1.1em;
  transition: transform var(--dur) var(--ease);
}
.btn--primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}
.btn--primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn--primary:hover .icon,
.btn--primary:hover [data-lucide="arrow-right"] {
  transform: translateX(2px);
}
.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-xs);
}
.btn--ghost:hover {
  border-color: var(--text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn--sm {
  --btn-py: 0.55rem;
  --btn-px: 0.95rem;
  font-size: var(--text-sm);
}
.btn--lg {
  --btn-py: 0.95rem;
  --btn-px: 1.6rem;
  font-size: var(--text-lg);
}
.btn--block {
  display: flex;
  width: 100%;
}

.link-quiet {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-soft);
  transition: color var(--dur) var(--ease);
}
.link-quiet:hover {
  color: var(--primary);
}

/* — Avatars & stars --------------------------------------------------- */
.avatar {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--on-primary);
  background: linear-gradient(
    135deg,
    var(--color-vermilion-400),
    var(--color-vermilion-600)
  );
  border: 2px solid var(--bg);
}
.avatar--lg {
  width: 2.75rem;
  height: 2.75rem;
  font-size: var(--text-base);
}
.avatar-stack {
  display: flex;
}
.avatar-stack .avatar:not(:first-child) {
  margin-left: -0.6rem;
}
/* belt-flavoured avatar tints by index */
.avatar-stack .avatar[style*="--i: 1"] {
  background: linear-gradient(135deg, var(--belt-green), #2f6f47);
}
.avatar-stack .avatar[style*="--i: 2"] {
  background: linear-gradient(135deg, var(--belt-blue), #2c4f87);
}
.avatar-stack .avatar[style*="--i: 3"] {
  background: linear-gradient(135deg, var(--color-gold-400), var(--color-gold-600));
}

.stars {
  display: inline-flex;
  gap: 0.1rem;
  color: var(--color-gold-500);
}
.stars [data-lucide] {
  width: 1.05rem;
  height: 1.05rem;
  fill: currentColor;
  stroke: currentColor;
}

/* — Belt badge / dots ------------------------------------------------- */
.belt-dot {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: var(--radius-full);
  background: var(--belt);
  border: 2px solid color-mix(in srgb, var(--belt) 70%, #000 10%);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--belt) 22%, transparent);
  flex: none;
}

/* ============================ 5. SECTIONS ============================ */

/* — Header ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.site-header[data-elevated="true"] {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  color: var(--text);
}
.brand__seal {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  font-family: var(--font-jp);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--on-primary);
  background: var(--primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs), inset 0 0 0 1.5px rgba(255, 255, 255, 0.12);
  /* hanko stamp: slightly imperfect corners */
  transform: rotate(-2deg);
}
.brand__accent {
  color: var(--primary);
}

.primary-nav {
  margin-left: auto;
}
.primary-nav__list {
  display: flex;
  gap: var(--space-2);
}
.primary-nav__list a {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-soft);
  border-radius: var(--radius-md);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.primary-nav__list a:hover {
  color: var(--text);
  background: var(--bg-alt);
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  color: var(--text);
}
.nav-toggle:hover {
  background: var(--bg-alt);
}

/* Mobile menu */
.mobile-menu {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: var(--space-4) var(--container-pad) var(--space-6);
}
.mobile-menu[hidden] {
  display: none;
}
.mobile-menu nav {
  display: flex;
  flex-direction: column;
}
.mobile-menu nav a {
  padding: 0.85rem 0.5rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* — Hero -------------------------------------------------------------- */
.hero {
  position: relative;
  padding-block: clamp(3rem, 7vw, 6rem) clamp(3.5rem, 8vw, 6.5rem);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.enso {
  position: absolute;
  top: -8%;
  right: -10%;
  width: min(46rem, 70vw);
  color: var(--color-vermilion-100);
  opacity: 0.55;
  transform: rotate(-18deg);
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}

.hero__title {
  margin-top: var(--space-5);
  font-size: clamp(2.6rem, 6vw, var(--text-6xl));
  font-optical-sizing: auto;
  letter-spacing: -0.03em;
}
.hero__highlight {
  position: relative;
  color: var(--primary);
  white-space: nowrap;
}
.brushstroke {
  position: absolute;
  left: -1%;
  bottom: -0.32em;
  width: 102%;
  height: 0.5em;
  color: var(--color-vermilion-300);
  opacity: 0.85;
}
.hero__lede {
  margin-top: var(--space-6);
  max-width: 34rem;
  font-size: var(--text-lg);
  color: var(--text-soft);
}
.hero__actions {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.hero__proof {
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.hero__proof-text p {
  font-size: var(--text-sm);
  color: var(--text-muted);
}
.hero__proof-text strong {
  color: var(--text);
}

/* Hero product mock */
.hero__product {
  position: relative;
  justify-self: center;
  width: 100%;
  max-width: 26rem;
}
.kata-card {
  position: relative;
  z-index: 2;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
}
.kata-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}
.kata-card__tag,
.kata-card__streak {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.kata-card__tag {
  color: var(--primary);
  background: var(--primary-tint);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-full);
}
.kata-card__streak {
  color: var(--color-gold-600);
}
.kata-card__prompt {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}
.kata-card__sentence {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  color: var(--text);
  margin-bottom: var(--space-5);
}
.blank {
  color: var(--primary);
  border-bottom: 2px dashed var(--color-vermilion-300);
  padding-inline: 0.15em;
}
.kata-card__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.kata-option {
  text-align: left;
  padding: 0.75rem 0.95rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--surface);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.kata-option:first-child {
  border-color: var(--belt-green);
  background: color-mix(in srgb, var(--belt-green) 10%, var(--surface));
  color: #2c613e;
}
.kata-option--wrong {
  border-color: var(--color-vermilion-200);
  background: var(--primary-tint);
  color: var(--color-vermilion-700);
  text-decoration: line-through;
  opacity: 0.85;
}
.kata-card__foot {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.kata-card__progress-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}
.progress {
  flex: 1;
  height: 0.5rem;
  background: var(--bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress__bar {
  width: var(--value, 50%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--belt-green), #6cc28a);
}

.belt-badge {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  background: var(--text);
  color: var(--bg);
  padding: 0.6rem 0.95rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.belt-badge__rank {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
}
.belt-badge__level {
  font-size: var(--text-xs);
  color: var(--color-ink-400);
}
.belt-badge--float {
  position: absolute;
  top: -1.1rem;
  left: -1.1rem;
  z-index: 3;
  border-left: 4px solid var(--belt-green);
}
.floating-chip {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}
.floating-chip--feedback {
  bottom: -1rem;
  right: -0.8rem;
  color: #2c613e;
}
.floating-chip--feedback [data-lucide] {
  color: #fff;
  background: var(--belt-green);
  border-radius: var(--radius-full);
  padding: 2px;
  width: 1.1rem;
  height: 1.1rem;
}

/* — Trust bar --------------------------------------------------------- */
.trust {
  border-block: 1px solid var(--border);
  background: var(--bg-alt);
  padding-block: var(--space-8);
}
.trust__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}
.trust__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.trust__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(1.5rem, 5vw, 3.5rem);
}
.trust__logos li {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  color: var(--text);
  opacity: 0.45;
  transition: opacity var(--dur) var(--ease);
}
.trust__logos li:hover {
  opacity: 0.8;
}

/* — The Path (belts) -------------------------------------------------- */
.belts {
  max-width: 52rem;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
}
.belt-row {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.belt-row:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.belt-row__chip {
  flex: none;
  display: grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--belt) 18%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--belt) 40%, var(--border));
}
.belt-knot {
  width: 2rem;
  height: 0.85rem;
  border-radius: 3px;
  background: var(--belt);
  box-shadow: inset 0 -2px 3px rgba(0, 0, 0, 0.18),
    inset 0 1px 1px rgba(255, 255, 255, 0.25);
  position: relative;
}
.belt-knot::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 0.5rem;
  height: 1.15rem;
  top: -0.15rem;
  border-radius: 2px;
  background: color-mix(in srgb, var(--belt) 85%, #000 12%);
}
.belt-row--final {
  background: linear-gradient(120deg, var(--color-ink-900), var(--color-ink-700));
  border-color: var(--color-ink-800);
}
.belt-row--final:hover {
  box-shadow: var(--shadow-lg);
}
.belt-row--final h3,
.belt-row--final p {
  color: var(--color-paper-50);
}
.belt-row--final .belt-row__level {
  color: var(--color-vermilion-400);
  background: rgba(192, 53, 43, 0.2);
}
.belt-row--final .belt-row__chip {
  background: var(--color-paper-100);
  border-color: var(--color-paper-300);
}
/* Keep the dark-row description readable (beats .belt-row__body p) */
.belt-row--final .belt-row__body p {
  color: var(--color-paper-200);
}
.belt-row__body {
  flex: 1;
}
.belt-row__title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.25rem;
}
.belt-row__title h3 {
  font-size: var(--text-xl);
}
.belt-row__level {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text-soft);
  background: var(--bg-alt);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}
.belt-row__body p {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

/* — The Method (features) --------------------------------------------- */
.method {
  background: var(--bg-alt);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.feature-card__icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  color: var(--primary);
  background: var(--primary-tint);
  margin-bottom: var(--space-4);
}
.feature-card__icon [data-lucide] {
  width: 1.5rem;
  height: 1.5rem;
}
.feature-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.feature-card p {
  color: var(--text-muted);
  font-size: var(--text-sm);
}
.feature-card em {
  font-style: italic;
  color: var(--text-soft);
}

/* — How it works (steps) ---------------------------------------------- */
.step-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  counter-reset: step;
}
.step {
  position: relative;
  text-align: center;
  padding: var(--space-6) var(--space-4);
}
/* connecting line between steps */
.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 3.4rem;
  left: 62%;
  width: 76%;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--border-strong) 0 8px,
    transparent 8px 16px
  );
}
.step__num {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.1em;
}
.step__icon {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  margin: var(--space-3) auto var(--space-4);
  border-radius: var(--radius-full);
  color: var(--text);
  background: var(--surface);
  border: 1.5px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.step__icon [data-lucide] {
  width: 1.6rem;
  height: 1.6rem;
}
.step h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}
.step p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  max-width: 18rem;
  margin-inline: auto;
}

/* — Testimonials ------------------------------------------------------ */
.testimonials {
  background: var(--bg-alt);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.testimonial {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
}
.testimonial blockquote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  color: var(--text);
  flex: 1;
}
.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.testimonial__author strong {
  display: block;
  font-size: var(--text-sm);
}
.testimonial__role {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* — Pricing ----------------------------------------------------------- */
.billing-toggle {
  display: inline-flex;
  gap: 0.25rem;
  margin-top: var(--space-6);
  padding: 0.3rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
}
.billing-toggle__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.billing-toggle__btn.is-active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-xs);
}
.billing-toggle__save {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--belt-green);
  background: color-mix(in srgb, var(--belt-green) 14%, transparent);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  align-items: start;
}
.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-6);
  box-shadow: var(--shadow-xs);
}
.price-card--featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  /* gentle lift on desktop */
}
.price-card__ribbon {
  position: absolute;
  top: -0.85rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--on-primary);
  background: var(--primary);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}
.price-card__head h3 {
  font-size: var(--text-2xl);
  margin-top: var(--space-2);
}
.price-card__tagline {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: 0.15rem;
}
.price-card__price {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}
.price-card__amount {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.price-card__period {
  font-size: var(--text-sm);
  color: var(--text-muted);
}
.price-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.price-card__features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--text-sm);
  color: var(--text-soft);
}
.price-card__features [data-lucide] {
  width: 1.05rem;
  height: 1.05rem;
  color: var(--belt-green);
  flex: none;
  stroke-width: 3;
}

/* — FAQ --------------------------------------------------------------- */
.faq__inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.faq .section__head {
  margin-bottom: 0;
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
}
.faq__inner a {
  color: var(--primary);
  font-weight: 600;
}
.accordion {
  display: flex;
  flex-direction: column;
}
.accordion__item {
  border-bottom: 1px solid var(--border);
}
.accordion__item:first-child {
  border-top: 1px solid var(--border);
}
.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  text-align: left;
  padding: var(--space-5) 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}
.accordion__trigger:hover {
  color: var(--primary);
}
.accordion__icon {
  flex: none;
  color: var(--primary);
  transition: transform var(--dur) var(--ease);
}
.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(45deg);
}
.accordion__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-slow) var(--ease);
}
.accordion__panel p {
  padding-bottom: var(--space-5);
  color: var(--text-muted);
  font-size: var(--text-base);
  max-width: 40rem;
}

/* — Final CTA --------------------------------------------------------- */
.cta {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}
.cta__panel {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4) var(--space-6);
  background: linear-gradient(150deg, var(--color-ink-900), #2b2719 130%);
  color: var(--color-paper-50);
  border-radius: var(--radius-2xl);
  padding: clamp(1.25rem, 3vw, 1.75rem) clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-lg);
}
.cta__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.enso--cta {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40rem;
  max-width: 120%;
  transform: translate(-50%, -50%) rotate(-12deg);
  color: var(--color-vermilion-500);
  opacity: 0.12;
}
.cta__seal {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  font-family: var(--font-jp);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--on-primary);
  background: var(--primary);
  border-radius: var(--radius-lg);
  transform: rotate(-3deg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-5);
}
.cta__title {
  position: relative;
  font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
  color: #fff;
  max-width: 22ch;
  margin-inline: auto;
}
.cta__lede {
  position: relative;
  margin: 0;
  color: var(--color-paper-100);
  font-size: var(--text-lg);
  font-weight: 500;
}
.cta__notify {
  position: relative;
  flex: none;
}
.cta__form {
  position: relative;
  display: flex;
  gap: var(--space-3);
  max-width: 30rem;
  margin: var(--space-8) auto 0;
}
.cta__input {
  flex: 1;
  min-width: 0;
  padding: 0.95rem 1.1rem;
  font-size: var(--text-base);
  color: var(--text);
  background: var(--color-paper-50);
  border: 1.5px solid transparent;
  border-radius: var(--radius-full);
  transition: box-shadow var(--dur) var(--ease);
}
.cta__input::placeholder {
  color: var(--text-muted);
}
.cta__input:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--ring);
}
.cta__fineprint {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-paper-300);
}
.cta__fineprint [data-lucide] {
  color: var(--color-gold-400);
}

/* — Footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer__inner {
  padding-bottom: var(--space-10);
}
.footer__tagline {
  margin-top: var(--space-4);
  max-width: 22rem;
  color: var(--text-muted);
  font-size: var(--text-sm);
}
.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.footer__social a {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-md);
  color: var(--text-soft);
  border: 1px solid var(--border);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.footer__social a:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}
.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__col h4 {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}
.footer__col a {
  font-size: var(--text-sm);
  color: var(--text-soft);
  transition: color var(--dur) var(--ease);
}
.footer__col a:hover {
  color: var(--primary);
}
.footer__legal {
  display: flex;
  justify-content: center;
  gap: var(--space-5);
}
.footer__legal a {
  font-size: var(--text-sm);
  color: var(--text-soft);
  transition: color var(--dur) var(--ease);
}
.footer__legal a:hover {
  color: var(--primary);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ============================ 6. ANIMATIONS & MOTION ============================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease),
    transform var(--dur-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.belt-badge--float {
  animation: float-y 5s var(--ease) infinite;
}
.floating-chip--feedback {
  animation: float-y 5s var(--ease) infinite;
  animation-delay: 1.2s;
}

/* ============================ 7. RESPONSIVE ============================ */
@media (max-width: 1024px) {
  .feature-grid,
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero__inner {
    grid-template-columns: 1fr;
  }
  .hero__product {
    margin-top: var(--space-8);
    max-width: 24rem;
  }
  .enso {
    opacity: 0.4;
  }
}

@media (max-width: 860px) {
  .primary-nav,
  .header__actions {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .price-grid {
    grid-template-columns: 1fr;
    max-width: 30rem;
    margin-inline: auto;
  }
  .price-card--featured {
    order: -1;
  }
  .faq__inner {
    grid-template-columns: 1fr;
  }
  .faq .section__head {
    position: static;
  }
  .step-list {
    grid-template-columns: 1fr;
    max-width: 24rem;
    margin-inline: auto;
    gap: var(--space-3);
  }
  .step:not(:last-child)::after {
    display: none;
  }
  .footer__inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  :root {
    --container-pad: 1.15rem;
  }
  .feature-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .hero__proof {
    flex-wrap: wrap;
  }
  .cta__form {
    flex-direction: column;
  }
  .cta__form .btn {
    width: 100%;
  }
  .footer__cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
  .belt-row {
    gap: var(--space-4);
    padding: var(--space-4);
  }
  .belt-row:hover {
    transform: none;
  }
}

/* ============================ MOTION PREFERENCES ============================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}