/* Tiggon Landing Page — Design tokens aligned with Tiggon-iOS TTTheme (light) */
/* Primary action uses blue per Tiggon color adjustment rule */

:root {
  /* Background */
  --bg-page: #F9F6F0;
  --bg-elevated: #ffffff;
  --bg-dark: #0F0F0F;
  --bg-dark-elevated: #1B1B1B;

  /* Surface */
  --surface-card: #ffffff;
  --stroke-hairline: rgba(31, 31, 31, 0.06);
  --stroke-subtle: rgba(31, 31, 31, 0.08);
  --neutral-fill: #EFEFEF;

  /* Text */
  --text-primary: #1F1F1F;
  --text-secondary: #5A5A5A;
  --text-tertiary: #8A8A8A;
  --text-on-dark: #F8F8F8;
  --text-on-dark-secondary: rgba(248, 248, 248, 0.72);

  /* Action — blue per Tiggon color rule */
  --action-primary: #5EA6FF;
  --action-primary-hover: #4A8AE0;
  --action-primary-text: #ffffff;
  --action-secondary-fill: #ECECEC;
  --action-secondary-text: #1F1F1F;

  /* Spacing (8pt grid) */
  --space-xs: 4px;
  --space-s: 8px;
  --space-m: 12px;
  --space-l: 16px;
  --space-xl: 20px;
  --space-xxl: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;
  --space-80: 80px;
  --space-112: 112px;
  --space-128: 128px;
  --page-padding: 32px;
  --container-max: 1280px;
  --section-gap: 80px;
  --header-height: 120px;
  --header-cta-height: 40px;

  /* Radius */
  --radius-control: 12px;
  --radius-card-m: 16px;
  --radius-card-l: 24px;
  --radius-round: 9999px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --title-hero: 700 48px/1.1 var(--font-sans);
  --title-section: 600 32px/1.2 var(--font-sans);
  --title-card: 600 20px/1.3 var(--font-sans);
  --body-l: 400 17px/1.5 var(--font-sans);
  --body-m: 400 15px/1.5 var(--font-sans);
  --label-m: 600 14px/1.4 var(--font-sans);
}

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

body {
  min-width: 320px;
  margin: 0;
}

main {
  margin: 0;
  padding: 0;
}

/* ----- Header ----- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  box-sizing: border-box;
  background: var(--bg-page);
  transition: box-shadow 0.2s ease;
}

.header--scrolled {
  box-shadow: 0 2px 12px rgba(31, 31, 31, 0.08);
}

.header__container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-m) var(--page-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-48);
  box-sizing: border-box;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-s);
  text-decoration: none;
  color: var(--text-primary);
  font: 600 24px/1.4 var(--font-sans);
}

.logo__icon {
  color: var(--action-primary);
  font-size: 18px;
  display: block;
  flex-shrink: 0;
}
.logo__icon[src] {
  width: 42px;
  height: auto;
}

.logo__text {
  letter-spacing: -0.02em;
}

.nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xxl);
}

.nav__link {
  color: var(--text-secondary);
  text-decoration: none;
  font: var(--body-l);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-m) var(--space-xxl);
  border-radius: var(--radius-control);
  font: var(--label-m);
  text-decoration: none;
  cursor: pointer;
  border: none;
  min-height: 44px;
}

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

.btn--primary:hover {
  background: var(--action-primary-hover);
}

.header__cta {
  flex-shrink: 0;
  margin-left: auto;
  margin-right: 0;
}

.header__cta--badge {
  display: inline-block;
  line-height: 0;
}

.header__cta--badge:hover .header__cta-img,
.header__cta--badge:focus-visible .header__cta-img {
  opacity: 0.9;
}

.header__cta-img {
  display: block;
  height: var(--header-cta-height);
  width: auto;
  max-width: none;
  transition: opacity 0.2s ease;
}

/* ----- Hero ----- */
.hero {
  background: var(--bg-page);
  padding: var(--space-112) var(--page-padding) var(--space-80);
}

.hero__container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-80);
  align-items: center;
}

.hero__title {
  margin: 0 0 var(--space-xxl);
  font: var(--title-hero);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero__desc {
  margin: 0 0 var(--space-48);
  font: var(--body-l);
  color: var(--text-secondary);
  max-width: 592px;
}

.hero__media {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xxl);
}

.hero__media-label {
  font: var(--label-m);
  color: var(--text-tertiary);
}

.hero__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__mask {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  background: var(--neutral-fill);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__phone-placeholder {
  width: 60%;
  height: 85%;
  background: var(--surface-card);
  border-radius: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.hero__caption {
  margin: var(--space-m) 0 0;
  font: var(--body-m);
  color: var(--text-tertiary);
}

/* ----- Features (dark section) ----- */
.features {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  padding: var(--space-112) var(--page-padding) var(--space-112);
}

.features__container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.features__intro {
  max-width: 768px;
  margin-bottom: var(--space-80);
}

.features__title {
  margin: 0 0 var(--space-l);
  font: var(--title-section);
  color: var(--text-on-dark);
}

.features__desc {
  margin: 0;
  font: var(--body-l);
  color: var(--text-on-dark-secondary);
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-80);
  align-items: start;
}

.features__phone {
  display: flex;
  justify-content: center;
}

.features__phone-frame {
  width: 280px;
  height: 560px;
  background: var(--bg-dark-elevated);
  border-radius: 36px;
  border: 8px solid var(--text-tertiary);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

.features__tabs {
  display: flex;
  flex-direction: column;
  gap: var(--space-xxl);
}

.feature-tab {
  background: var(--bg-dark-elevated);
  border-radius: var(--radius-card-m);
  padding: var(--space-32);
}

.feature-tab__title {
  margin: 0 0 var(--space-m);
  font: var(--title-card);
  color: var(--text-on-dark);
}

.feature-tab__text {
  margin: 0;
  font: var(--body-l);
  color: var(--text-on-dark-secondary);
}

/* ----- CTA ----- */
.cta {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  padding: var(--space-112) var(--page-padding);
  text-align: center;
}

.cta__container {
  max-width: 448px;
  margin: 0 auto;
}

.cta__title {
  margin: 0 0 var(--space-l);
  font: var(--title-section);
}

.cta__desc {
  margin: 0 0 var(--space-xxl);
  font: var(--body-l);
  color: var(--text-on-dark-secondary);
}

.cta__badge {
  display: inline-block;
  line-height: 0;
}

.cta__badge img {
  display: block;
  height: 48px;
  width: auto;
}

.cta__badge--btn {
  text-decoration: none;
  background: transparent;
}

.cta__badge--btn .cta__badge-img {
  background: transparent;
}

.cta__badge--btn .cta__badge-img {
  height: 56px;
  width: auto;
  border: 1px solid #fff;
  border-radius: 8px;
  box-sizing: border-box;
  transition: opacity 0.2s ease;
}

.cta__badge--btn:hover .cta__badge-img {
  opacity: 0.9;
}

/* ----- Testimonials ----- */
.testimonials {
  background: var(--bg-page);
  padding: var(--space-112) var(--page-padding) var(--space-112);
}

.testimonials__container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.testimonials__title {
  margin: 0 0 var(--space-m);
  font: var(--title-section);
  color: var(--text-primary);
  text-align: center;
}

.testimonials__subtitle {
  margin: 0 0 var(--space-64);
  font: var(--body-l);
  color: var(--text-secondary);
  text-align: center;
}

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

.testimonial-card {
  margin: 0;
  background: var(--surface-card);
  border-radius: var(--radius-card-m);
  padding: var(--space-xxl);
  border: 1px solid var(--stroke-hairline);
}

.testimonial-card__quote {
  margin: 0;
  font-style: normal;
}

.testimonial-card__stars {
  display: block;
  margin-bottom: var(--space-m);
  color: #F9B81F;
  font-size: 14px;
  letter-spacing: 2px;
}

.testimonial-card__cite {
  display: block;
  margin-bottom: var(--space-m);
  font: var(--title-card);
  color: var(--text-primary);
}

.testimonial-card__quote p {
  margin: 0 0 var(--space-l);
  font: var(--body-m);
  color: var(--text-secondary);
}

.testimonial-card__author {
  margin: 0;
  font: var(--body-m);
  color: var(--text-tertiary);
}

/* ----- Footer ----- */
.footer {
  background: var(--bg-page);
  border-top: 1px solid var(--stroke-hairline);
  padding: var(--space-80) var(--page-padding) var(--space-48);
}

.footer__container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer__top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-48);
  align-items: center;
  margin-bottom: var(--space-48);
}

.logo--footer {
  white-space: nowrap;
}
.logo--footer .logo__text {
  font: inherit;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xxl);
}

.footer__links a {
  color: var(--text-secondary);
  text-decoration: none;
  font: var(--body-m);
}

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

.footer__download-title {
  margin: 0 0 var(--space-s);
  font: var(--label-m);
  color: var(--text-primary);
}

.footer__download-desc {
  margin: 0 0 var(--space-m);
  font: var(--body-m);
  color: var(--text-secondary);
  max-width: 256px;
}

.footer__qr {
  width: 96px;
  height: 96px;
  background: var(--surface-card);
  border: 1px solid var(--stroke-subtle);
  border-radius: var(--radius-control);
}

.footer__bottom {
  padding-top: var(--space-xxl);
  border-top: 1px solid var(--stroke-hairline);
}

.footer__copy {
  margin: 0;
  font: var(--body-m);
  color: var(--text-tertiary);
}

/* ----- Responsive ----- */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__media {
    justify-content: center;
  }

  .hero__visual {
    order: -1;
  }

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

  .features__phone {
    order: -1;
  }

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

  .footer__top {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .footer__links {
    justify-content: center;
  }

  .footer__qr {
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --page-padding: 24px;
    --section-gap: 48px;
  }

  .header__container {
    flex-wrap: nowrap;
    padding: var(--space-m) var(--page-padding);
    gap: var(--space-l);
  }

  .nav {
    display: none;
  }

  .hero {
    padding: var(--space-64) var(--page-padding) var(--space-48);
  }

  .hero__title {
    font-size: 36px;
  }

  .features__intro {
    margin-bottom: var(--space-48);
  }

  .features__phone-frame {
    width: 220px;
    height: 440px;
  }

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

  .footer__links {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .header__container {
    padding: var(--space-m) var(--page-padding);
    gap: var(--space-s);
  }

  .hero__title {
    font-size: 28px;
  }

  .hero__mask {
    max-width: 280px;
  }
}