/* IeKan — Shared Design System
   Mirrors the iOS app's visual language:
   green primary, card-based layout, iOS system font stack */

/* ===== DESIGN TOKENS ===== */
:root {
  --color-primary:        #34C759;
  --color-primary-light:  rgba(52, 199, 89, 0.10);
  --color-primary-mid:    rgba(52, 199, 89, 0.18);
  --color-secondary:      #AF52DE;
  --color-secondary-light:rgba(175, 82, 222, 0.10);
  --color-warning:        #FF9500;
  --color-warning-light:  rgba(255, 149, 0, 0.10);
  --color-blue:           #007AFF;
  --color-blue-light:     rgba(0, 122, 255, 0.10);
  --color-danger:         #FF3B30;
  --color-text:           #1C1C1E;
  --color-text-secondary: #555558;
  --color-text-tertiary:  #8E8E93;
  --color-surface:        #FFFFFF;
  --color-bg:             #F2F2F7;
  --color-border:         rgba(0, 0, 0, 0.08);
  --color-separator:      rgba(0, 0, 0, 0.06);

  --radius-card:  16px;
  --radius-inner: 10px;
  --radius-pill:  999px;

  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-nav:  0 1px 0 rgba(0, 0, 0, 0.08);

  --font-stack: -apple-system, "SF Pro Display", "Hiragino Sans",
                "Yu Gothic UI", "Noto Sans JP", sans-serif;

  --max-width: 700px;
  --page-padding: 20px;
}

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

html {
  font-family: var(--font-stack);
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== TYPOGRAPHY ===== */
.t-large-title {
  font-size: clamp(28px, 7vw, 38px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
}
.t-title {
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.3px;
}
.t-headline {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}
.t-body {
  font-size: 15px;
  font-weight: 400;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: break-word;
}
.t-caption {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

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

.section { padding-block: 52px; }
.section--alt { background: var(--color-surface); }

/* ===== NAVIGATION ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
}

.site-nav__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding);
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.site-nav__brand svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav__links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 6px 10px;
  border-radius: var(--radius-inner);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.site-nav__links a:hover {
  color: var(--color-text);
  background: var(--color-bg);
  text-decoration: none;
}

.site-nav__links a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-primary-light);
}

/* ===== FOOTER ===== */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-separator);
  padding-block: 40px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-padding);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 28px;
  margin-bottom: 32px;
}

.footer-col__title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 10px;
}

.footer-col__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col__links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

.footer-col__links a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.site-footer__copy {
  font-size: 12px;
  color: var(--color-text-tertiary);
  border-top: 1px solid var(--color-separator);
  padding-top: 20px;
}

/* ===== CARDS ===== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
}

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}
.badge--green  { background: var(--color-primary-light);   color: #1a8a38; }
.badge--orange { background: var(--color-warning-light);   color: #b86a00; }
.badge--purple { background: var(--color-secondary-light); color: #7b2aa8; }
.badge--blue   { background: var(--color-blue-light);      color: #0055cc; }
.badge--gray   { background: var(--color-bg);              color: var(--color-text-secondary); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-card);
  font-family: var(--font-stack);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { opacity: 0.88; text-decoration: none; }
.btn:active { transform: scale(0.98); }

.btn--primary  { background: var(--color-primary); color: #fff; }
.btn--outline  { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.btn--block    { width: 100%; }

/* ===== FEATURE ROW (icon + text) ===== */
.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.feature-icon--green  { background: var(--color-primary-light); }
.feature-icon--blue   { background: var(--color-blue-light); }
.feature-icon--orange { background: var(--color-warning-light); }
.feature-icon--purple { background: var(--color-secondary-light); }

.feature-text { flex: 1; }
.feature-text h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.feature-text p  { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* ===== CALLOUT CARD (left border) ===== */
.callout {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px 20px 20px 24px;
  border-left: 4px solid transparent;
}
.callout--green  { border-color: var(--color-primary); }
.callout--orange { border-color: var(--color-warning); }
.callout--purple { border-color: var(--color-secondary); }

.callout__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.callout--green  .callout__label { color: var(--color-primary); }
.callout--orange .callout__label { color: var(--color-warning); }
.callout--purple .callout__label { color: var(--color-secondary); }

.callout__title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.callout__body  { font-size: 14px; color: var(--color-text-secondary); line-height: 1.65; }

/* ===== PRICING CARDS ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 560px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}

.pricing-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px 20px;
  border: 2px solid transparent;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.pricing-card--featured { border-color: var(--color-primary); }

.pricing-card__recommended {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}

.pricing-card__name  { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--color-text-secondary); }
.pricing-card__price { font-size: clamp(24px, 6vw, 30px); font-weight: 700; line-height: 1.1; }
.pricing-card__price span { font-size: 14px; font-weight: 400; color: var(--color-text-secondary); }
.pricing-card__alt   { font-size: 12px; color: var(--color-text-tertiary); margin-top: 2px; }

.pricing-card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.pricing-card__features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}
.pricing-card__features li::before {
  content: "✓";
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ===== LEGAL PAGES ===== */
.legal-content h2 {
  font-size: 17px;
  font-weight: 600;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary);
  margin-top: 36px;
  margin-bottom: 12px;
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content p  { font-size: 14px; line-height: 1.8; color: var(--color-text-secondary); margin-bottom: 10px; }
.legal-content ul { padding-left: 20px; margin-bottom: 10px; }
.legal-content li { font-size: 14px; line-height: 1.8; color: var(--color-text-secondary); margin-bottom: 4px; }
.legal-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-block: 14px;
}
.legal-content th, .legal-content td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-separator);
}
.legal-content th { font-weight: 600; background: var(--color-bg); color: var(--color-text); }
.legal-content td { color: var(--color-text-secondary); }

/* ===== FAQ ACCORDION ===== */
details {
  background: var(--color-surface);
  border-radius: var(--radius-inner);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
details + details { margin-top: 8px; }

summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  user-select: none;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.2s;
}
details[open] summary::after { content: "−"; }

.faq-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-separator);
  padding-top: 14px;
}
.faq-answer a { color: var(--color-primary); }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(170deg, var(--color-primary-light) 0%, var(--color-bg) 60%);
  padding-block: 64px 52px;
  text-align: center;
}
.hero .badge { margin-bottom: 18px; }
.hero .t-large-title { margin-bottom: 16px; }
.hero .t-body { color: var(--color-text-secondary); margin-bottom: 28px; max-width: 500px; margin-inline: auto; }

.stat-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.stat-badge {
  background: var(--color-surface);
  border-radius: var(--radius-inner);
  box-shadow: var(--shadow-card);
  padding: 10px 16px;
  text-align: center;
}
.stat-badge__num  { font-size: 20px; font-weight: 700; color: var(--color-primary); line-height: 1.2; }
.stat-badge__label{ font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

.hero__cta { margin-bottom: 16px; }
.hero__note { font-size: 12px; color: var(--color-text-tertiary); }

/* App Store badge */
.appstore-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #000;
  color: #fff;
  border-radius: 12px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s;
}
.appstore-badge:hover { opacity: 0.82; text-decoration: none; color: #fff; }
.appstore-badge svg { width: 20px; height: 20px; fill: #fff; }
.appstore-badge__sub { font-size: 10px; font-weight: 400; opacity: 0.7; display: block; }

/* ===== SECTION HEADERS ===== */
.section-header { margin-bottom: 28px; }
.section-header .badge { margin-bottom: 10px; }
.section-header .t-title { margin-bottom: 8px; }
.section-header .t-body  { color: var(--color-text-secondary); }

/* ===== FEATURE GRID ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 500px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== CALLOUT STACK ===== */
.callout-stack { display: flex; flex-direction: column; gap: 14px; }

/* ===== CONTACT CARD ===== */
.contact-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
  text-align: center;
}
.contact-card__icon { font-size: 40px; margin-bottom: 12px; }
.contact-card__title { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.contact-card__body  { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 16px; line-height: 1.65; }
.contact-card__email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  transition: background 0.15s;
}
.contact-card__email:hover { background: var(--color-primary-mid); text-decoration: none; }

/* ===== APP INFO CARD ===== */
.app-info-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.app-info-table td { padding: 10px 0; border-bottom: 1px solid var(--color-separator); }
.app-info-table td:first-child { color: var(--color-text-secondary); width: 40%; }
.app-info-table td:last-child  { font-weight: 500; }

/* ===== SIMPLEMODE CALLOUT ===== */
.simplemode-banner {
  background: linear-gradient(135deg, #f0faf4 0%, #fff 100%);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 24px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.simplemode-banner__icon { font-size: 42px; flex-shrink: 0; line-height: 1; }
.simplemode-banner__title { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.simplemode-banner__body  { font-size: 14px; color: var(--color-text-secondary); line-height: 1.65; }

/* ===== PRICING LEGAL NOTE ===== */
.pricing-note {
  margin-top: 20px;
  font-size: 12px;
  color: var(--color-text-tertiary);
  text-align: center;
  line-height: 1.6;
}

/* ===== FAQ CATEGORY LABEL ===== */
.faq-category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-top: 28px;
  margin-bottom: 10px;
  padding-left: 4px;
}
.faq-category:first-child { margin-top: 0; }

/* ===== UTILITIES ===== */
.mt-4  { margin-top: 4px; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-4  { margin-bottom: 4px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.stack { display: flex; flex-direction: column; gap: var(--stack-gap, 12px); }
.center { text-align: center; }