/* === pictan LP — design tokens (Anthropic-derived) === */
:root {
  /* Brand & accent */
  --primary: #cc785c;
  --primary-active: #a9583e;
  --primary-disabled: #e6dfd8;
  --accent-teal: #5db8a6;
  --accent-amber: #e8a55a;

  /* Surface */
  --canvas: #faf9f5;
  --surface-soft: #f5f0e8;
  --surface-card: #efe9de;
  --surface-cream-strong: #e8e0d2;
  --surface-dark: #181715;
  --surface-dark-elev: #252320;
  --surface-dark-soft: #1f1e1b;
  --hairline: #e6dfd8;
  --hairline-soft: #ebe6df;

  /* Text */
  --ink: #141413;
  --body-strong: #252523;
  --body: #3d3d3a;
  --muted: #6c6a64;
  --muted-soft: #8e8b82;
  --on-primary: #ffffff;
  --on-dark: #faf9f5;
  --on-dark-soft: #a09d96;

  /* Semantic */
  --success: #5db872;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;

  /* Type */
  --font-display: "Cormorant Garamond", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-body: "Inter", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip; /* contain decorative bleed without breaking sticky nav */
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 96px 0;
}
.section--tight { padding: 64px 0; }

/* Type utilities */
.display-xl {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.display-lg {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(32px, 4.6vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.display-md {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}
.display-sm {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.title-md { font-weight: 600; font-size: 18px; line-height: 1.4; margin: 0; color: var(--ink); }
.title-sm { font-weight: 600; font-size: 16px; line-height: 1.4; margin: 0; color: var(--ink); }
.body-md { font-size: 16px; line-height: 1.65; color: var(--body); margin: 0; }
.body-sm { font-size: 14px; line-height: 1.6; color: var(--body); margin: 0; }
.muted { color: var(--muted); }
.caption-up {
  font-size: 12px; font-weight: 500; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--muted);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; height: 44px;
  border-radius: var(--r-md);
  font-weight: 500; font-size: 14px;
  transition: background 0.15s ease, transform 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--primary); color: var(--on-primary);
}
.btn--primary:hover { background: var(--primary-active); }
.btn--secondary {
  background: var(--canvas); color: var(--ink);
  border: 1px solid var(--hairline);
}
.btn--secondary:hover { background: var(--surface-card); }
.btn--on-dark {
  background: var(--canvas); color: var(--ink);
}
.btn--on-dark:hover { background: #fff; }
.btn--lg { height: 52px; padding: 14px 26px; font-size: 15px; }

/* Top nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: 64px;
  background: rgba(250, 249, 245, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline-soft);
}
.nav__inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-weight: 500; font-size: 22px;
  letter-spacing: -0.01em;
}
.nav__brand-logo, .footer__brand-logo {
  width: 26px; height: 26px;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(20, 20, 19, 0.14);
  flex-shrink: 0;
}
.nav__links {
  display: flex; gap: 28px;
  font-size: 14px; font-weight: 500;
  color: var(--body);
}
.nav__links a:hover { color: var(--ink); }
@media (max-width: 768px) {
  .nav__links { display: none; }
}

/* Language switch */
.nav__lang {
  display: inline-flex; align-items: center;
  gap: 6px;
  margin-right: 16px;
  font-size: 13px; font-weight: 500;
  color: var(--muted);
}
.nav__lang-btn {
  padding: 4px 8px;
  border-radius: var(--r-sm);
  color: var(--muted);
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}
.nav__lang-btn:hover { color: var(--ink); }
.nav__lang-btn--active {
  color: var(--ink);
  background: var(--surface-card);
}
.nav__lang-sep {
  color: var(--hairline);
  user-select: none;
}
@media (max-width: 480px) {
  .nav__lang { margin-right: 8px; font-size: 12px; }
  .nav__lang-btn { padding: 4px 6px; }
}
/* On phones the long "Get it on the App Store" pill doesn't fit the sticky bar
   alongside brand + language switch; rely on the hero / in-page CTAs instead. */
@media (max-width: 560px) {
  .nav .btn--primary { display: none; }
}

/* Hero */
.hero {
  padding: 80px 0 96px;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
/* Allow grid columns to shrink below their content's intrinsic width
   (the phone mockup has a fixed px width) so nothing overflows on mobile. */
.hero__grid > * { min-width: 0; }
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--surface-card);
  font-size: 13px; font-weight: 500;
  color: var(--body-strong);
  margin-bottom: 24px;
}
.hero__eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--primary);
}
.hero__sub {
  margin-top: 24px;
  font-size: 18px; line-height: 1.65;
  color: var(--body);
  max-width: 540px;
}
.hero__cta-row {
  margin-top: 36px;
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
}
.hero__cta-note {
  margin-top: 16px;
  font-size: 13px; color: var(--muted);
}

/* iPhone frame */
.phone {
  position: relative;
  width: 320px;
  max-width: 100%;
  margin: 0 auto;
  aspect-ratio: 320 / 660;
  background: #0a0a0a;
  border-radius: 48px;
  padding: 12px;
  box-shadow:
    0 0 0 2px #2a2a2a,
    0 30px 60px -20px rgba(20, 20, 19, 0.25),
    0 10px 30px -15px rgba(20, 20, 19, 0.15);
}
.phone__screen {
  width: 100%; height: 100%;
  border-radius: 36px;
  overflow: hidden;
  background: #faf9f5;
  position: relative;
}
.phone__screen img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
}
.phone--lg { width: 360px; }
.phone--sm { width: 260px; }

/* Hero decorative dots */
.hero__phone-wrap {
  position: relative;
}
.hero__dots {
  position: absolute;
  width: 80px; height: 80px;
  opacity: 0.5;
}
.hero__dots--tr { top: 20px; right: -10px; }
.hero__dots--bl { bottom: 60px; left: -10px; }

/* Pain section */
.pain {
  background: var(--surface-soft);
}
.pain__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}
@media (max-width: 900px) {
  .pain__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .pain__grid { grid-template-columns: 1fr; }
}
.pain-card {
  background: var(--canvas);
  border-radius: var(--r-lg);
  padding: 28px 24px;
  border: 1px solid var(--hairline);
  display: flex; flex-direction: column;
  gap: 12px;
  min-height: 200px;
}
.pain-card__icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
}
.pain-card__title {
  font-weight: 600; font-size: 16px; line-height: 1.4;
  color: var(--ink);
}
.pain-card__body {
  font-size: 14px; line-height: 1.6;
  color: var(--muted);
}

/* Structural — 3 reasons */
.struct__intro {
  max-width: 720px;
  margin-top: 24px;
}
.struct__list {
  margin-top: 56px;
  display: flex; flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--hairline);
}
.struct-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: start;
}
@media (max-width: 720px) {
  .struct-row { grid-template-columns: 1fr; gap: 12px; }
}
.struct-row__num {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 500;
  color: var(--primary);
  line-height: 1;
}
.struct-row__title {
  font-weight: 600; font-size: 18px; line-height: 1.4;
  color: var(--ink);
}
.struct-row__body {
  font-size: 15px; line-height: 1.65;
  color: var(--body);
}

/* 3 pillars */
.pillars {
  background: var(--surface-card);
}
.pillars__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}
@media (max-width: 900px) {
  .pillars__grid { grid-template-columns: 1fr; }
}
.pillar-card {
  background: var(--canvas);
  border-radius: var(--r-lg);
  padding: 36px 32px;
  display: flex; flex-direction: column;
  gap: 16px;
}
.pillar-card__index {
  font-family: var(--font-display);
  font-size: 20px; color: var(--primary);
  display: flex; align-items: baseline; gap: 12px;
}
.pillar-card__index-num {
  font-size: 14px; letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-body);
  font-weight: 500;
}
.pillar-card__title {
  font-family: var(--font-display);
  font-size: 26px; font-weight: 500;
  line-height: 1.2; letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.pillar-card__body {
  font-size: 15px; line-height: 1.65;
  color: var(--body);
}
.pillar-card__viz {
  margin-top: auto;
  background: var(--surface-card);
  border-radius: var(--r-md);
  padding: 16px;
  min-height: 100px;
  display: flex; align-items: center; justify-content: center;
}

.pillars__synergy {
  margin-top: 56px;
  background: var(--surface-dark);
  color: var(--on-dark);
  border-radius: var(--r-xl);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 900px) {
  .pillars__synergy { grid-template-columns: 1fr; padding: 40px 28px; gap: 32px; }
}
.synergy__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 36px);
  font-weight: 500; line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--on-dark);
  margin: 0;
}
.synergy__lead {
  margin-top: 16px;
  font-size: 16px; line-height: 1.7;
  color: var(--on-dark-soft);
}
.synergy__triangle {
  position: relative;
  aspect-ratio: 1;
  max-width: 320px;
  margin: 0 auto;
}
.synergy__triangle svg { width: 100%; height: 100%; }

/* Demo (interactive flashcard) */
.demo {
  background: var(--canvas);
}
.demo__pair {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: start;
  justify-items: center;
}
.demo__phase {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  max-width: 360px;
  width: 100%;
}
.demo__phase .phone__screen { background: #fff; }
.demo__phase .phone__screen img {
  object-fit: contain;
  object-position: center top;
  background: #fff;
}
.demo__phase-caption {
  display: flex; gap: 14px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline);
  background: var(--surface-card);
  width: 100%;
}
.demo__phase-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--primary); color: var(--on-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 13px;
  flex-shrink: 0;
}
.demo__phase-title { font-weight: 600; font-size: 15px; margin: 0 0 4px; }
.demo__phase-body { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.55; }
.demo__phase-body em {
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
}
.demo__arrow {
  align-self: center;
  margin-top: 220px; /* center on the phone, not the column */
  color: var(--muted);
  display: flex; align-items: center; justify-content: center;
}
@media (max-width: 900px) {
  .demo__pair {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .demo__arrow {
    margin-top: 0;
    transform: rotate(90deg);
  }
}

/* Levels */
.levels {
  background: var(--surface-soft);
}

/* Progress preview */
.levels__progress {
  margin-top: 48px;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
@media (max-width: 720px) {
  .levels__progress { grid-template-columns: 1fr; }
}
.progress-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.progress-title { font-family: var(--font-display); font-size: 26px; }
.progress-count { font-size: 13px; color: var(--muted); }
.progress-bar { height: 8px; background: var(--surface-card); border-radius: 4px; overflow: hidden; display: flex; }
.progress-bar > div { height: 100%; }
.progress-status {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
  margin-top: 18px;
}
.progress-status__item { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.progress-status__dot { width: 8px; height: 8px; border-radius: 50%; }
.progress-status__item .muted { margin-left: auto; }
.progress-note {
  font-size: 15px; line-height: 1.7; color: var(--body);
}
.progress-note em {
  font-family: var(--font-display);
  font-size: 1.1em;
  font-style: normal;
}

/* Privacy */
.privacy {
  background: var(--surface-dark);
  color: var(--on-dark);
}
.privacy .display-lg { color: var(--on-dark); }
.privacy__lead {
  color: var(--on-dark-soft);
  margin-top: 16px;
  max-width: 620px;
  font-size: 16px; line-height: 1.7;
}
.privacy__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
@media (max-width: 720px) {
  .privacy__grid { grid-template-columns: 1fr; }
}
.privacy-card {
  background: var(--surface-dark-elev);
  border-radius: var(--r-lg);
  padding: 24px 24px;
}
.privacy-card__title {
  font-weight: 600; font-size: 15px;
  color: var(--on-dark);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 8px;
}
.privacy-card__check {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent-teal);
  display: flex; align-items: center; justify-content: center;
  color: var(--surface-dark);
  flex-shrink: 0;
}
.privacy-card__body { color: var(--on-dark-soft); font-size: 14px; line-height: 1.6; }

/* FAQ */
.faq {
  background: var(--canvas);
}
.faq__list {
  margin-top: 40px;
  border-top: 1px solid var(--hairline);
}
.faq-item {
  border-bottom: 1px solid var(--hairline);
}
.faq-item__q {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 0;
  font-family: var(--font-body);
  font-size: 17px; font-weight: 500;
  color: var(--ink);
  text-align: left;
}
.faq-item__icon {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item--open .faq-item__icon { transform: rotate(45deg); }
.faq-item__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--body);
  font-size: 15px; line-height: 1.7;
  padding-right: 60px;
}
.faq-item--open .faq-item__a {
  max-height: 500px;
  padding-bottom: 24px;
}

/* Final CTA */
.final-cta {
  padding: 96px 0;
  background: var(--canvas);
}
.final-cta__card {
  background: var(--primary);
  color: var(--on-primary);
  border-radius: var(--r-xl);
  padding: 80px 48px;
  text-align: center;
}
@media (max-width: 720px) {
  .final-cta__card { padding: 56px 28px; }
}
.final-cta__title {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 500; line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--on-primary);
  margin: 0 0 20px;
}
.final-cta__sub {
  font-size: 17px; line-height: 1.6;
  color: rgba(255,255,255,0.92);
  max-width: 540px;
  margin: 0 auto 36px;
}
.final-cta__note {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

/* Footer */
.footer {
  background: var(--surface-dark);
  color: var(--on-dark-soft);
  padding: 56px 0 40px;
}
.footer__top {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer__brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: 22px; color: var(--on-dark);
}
.footer__links {
  display: flex; gap: 28px;
  font-size: 14px;
  flex-wrap: wrap;
}
.footer__links a:hover { color: var(--on-dark); }
.footer__bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid #2c2a27;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--muted-soft);
  flex-wrap: wrap; gap: 12px;
}

/* Section header */
.section-header {
  max-width: 780px;
}
.section-header__sub {
  margin-top: 18px;
  font-size: 17px; line-height: 1.65;
  color: var(--body);
}

/* Decorative dots pattern */
.dot-pattern {
  background-image: radial-gradient(var(--primary-disabled) 1px, transparent 1px);
  background-size: 12px 12px;
  opacity: 0.6;
}