/* =====================================================
   MIINT — Register Stylesheet
   ===================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: #E4E2DF;
}
body {
  font-family: 'Zen Kaku Gothic New', sans-serif;
  background: transparent;
  color: #333;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; }

:root {
  --mint:       #CCF3EE;
  --mint-light: #9AE0D8;
  --mint-light2: #CDF3EE;
  --mint-dark:  #6DCFC4;
  --mint-blue:  #ACC2D8;
  --text-dark:  #333333;
  --text-mid:   #666666;
  --text-light: #999999;
  --bg:         #FAFAF8;
  --white:      #ffffff;
  --header-h:   64px;
  --error:      #e55;
}

/* ── HEADER ── */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: transparent;
  backdrop-filter: none;
  border-bottom: none;
  transition: background 0.3s, backdrop-filter 0.3s, border-color 0.3s;
}
#header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}
.header-logo { display: flex; align-items: center; }
.header-logo img { height: 36px; width: auto; }
.menu-btn {
  background: none; border: none;
  display: flex; flex-direction: column; gap: 12px; padding: 12px;
}
.menu-btn span {
  display: block; width: 44px; height: 1px;
  background: var(--text-dark); transition: background 0.2s;
}
.menu-btn:hover span { background: var(--mint-dark); }

/* ── MENU OVERLAY ── */
.menu-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; visibility: hidden; pointer-events: none;
  transition: visibility 0s linear 0.45s;
}
.menu-overlay.open {
  visibility: visible; pointer-events: auto;
  transition: visibility 0s linear 0s;
}
.menu-bg { flex: 1; position: relative; overflow: hidden; opacity: 0; transition: opacity 0.45s ease; }
.menu-bg::before {
  content: ''; position: absolute; inset: -30px;
  background: #e4e2df; filter: brightness(0.9);
}
.menu-overlay.open .menu-bg { opacity: 1; }
.menu-panel {
  width: 380px; background: var(--white);
  display: flex; flex-direction: column;
  padding: 48px 40px 40px; overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.menu-overlay.open .menu-panel { transform: translateX(0); }
.menu-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 48px;
}
.menu-logo img { height: 22px; width: auto; }
.menu-close-btn {
  background: none; border: none; padding: 6px;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.2s;
}
.menu-close-btn:hover { opacity: 0.5; }
.menu-nav { display: flex; flex-direction: column; margin-bottom: 32px; }
.menu-nav a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; font-weight: 300; font-size: 16px;
  letter-spacing: 0.18em; color: var(--text-dark);
  border-bottom: 1px solid #e8e8e8; transition: color 0.2s;
}
.menu-nav a:first-child { border-top: 1px solid #e8e8e8; }
.menu-nav a:hover { color: var(--mint-dark); }
.menu-cta {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: linear-gradient(90deg, var(--mint-dark) 0%, var(--mint-blue) 100%);
  color: var(--white); padding: 16px 24px; border-radius: 50px;
  font-size: 13px; letter-spacing: 0.1em; margin-bottom: 28px;
  box-shadow: 0 4px 20px rgba(109,207,196,0.35);
  transition: opacity 0.25s, transform 0.25s;
}
.menu-cta:hover { opacity: 0.85; transform: translateY(-2px); }
.menu-social { display: flex; gap: 16px; justify-content: center; margin-top: auto; }
.menu-social a {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; opacity: 0.7; transition: opacity 0.2s;
}
.menu-social a:hover { opacity: 1; }
.menu-social svg { width: 18px; height: 18px; }
.btn-arrow { display: inline-block; transition: transform 0.3s ease; }

/* ── REGISTER MAIN ── */
.register-main {
  min-height: 100vh;
  padding-top: var(--header-h);
}

/* ── PAGE INNER ── */
.reg-page-inner {
  max-width: 520px;
  margin: 0 auto;
  padding: 56px 40px 120px;
}

/* ── HERO ── */
.reg-hero {
  text-align: center;
  padding: 32px 0 40px;
  position: relative;
}
.reg-title {
  font-size: 26px;
  font-weight: 350;
  letter-spacing: 0.2em;
  color: var(--text-dark);
}
.reg-required-note {
  position: absolute;
  top: 36px;
  right: 0;
  font-size: 11px;
  color: var(--text-light);
  letter-spacing: 0.04em;
}
.req-star {
  color: #d97b60;
  font-size: 12px;
}

/* ── FORM ELEMENTS ── */
.form-group {
  margin-bottom: 24px;
}
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.form-label .req-star {
  margin-left: 3px;
}
.form-label-sub {
  font-size: 11px;
  font-weight: 300;
  color: var(--text-light);
  margin-left: 6px;
  letter-spacing: 0.02em;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  border: 1px solid #d8d8d8;
  border-radius: 8px;
  padding: 13px 16px;
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-size: 14px;
  font-weight: 300;
  color: var(--text-dark);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--mint-dark);
  box-shadow: 0 0 0 3px rgba(109, 207, 196, 0.15);
}
.form-textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.8;
}
.form-select-wrap {
  position: relative;
}
.form-select-wrap::after {
  content: '▾';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  pointer-events: none;
  font-size: 13px;
}

/* ── BIRTH DATE ROW ── */
.birth-date-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.birth-year-wrap  { width: 116px; flex-shrink: 0; }
.birth-month-wrap { width: 80px;  flex-shrink: 0; }
.birth-day-wrap   { width: 80px;  flex-shrink: 0; }
.birth-date-label {
  font-size: 13px;
  color: var(--text-mid);
  white-space: nowrap;
  flex-shrink: 0;
}
.birth-date-note {
  font-size: 11px;
  color: var(--text-light);
  margin-top: 7px;
  line-height: 1.6;
}

/* ── INLINE RADIO (gender, marital status) ── */
.radio-inline-group {
  display: flex;
  gap: 28px;
  align-items: center;
  padding: 2px 0;
}
.radio-inline-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 300;
  color: var(--text-dark);
  user-select: none;
}
.radio-inline-label input[type="radio"] { display: none; }
.radio-dot-inline {
  width: 18px; height: 18px;
  border: 1.5px solid #c8c8c8;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s;
  background-color: #ffffff;
}
.radio-dot-inline::after {
  content: '';
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--mint-dark);
  opacity: 0;
  transition: opacity 0.2s;
}
.radio-inline-label.selected .radio-dot-inline { border-color: var(--mint-dark); }
.radio-inline-label.selected .radio-dot-inline::after { opacity: 1; }

/* ── WEIGHT INPUT ── */
.weight-input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}
.weight-input-wrap .form-input {
  width: 160px;
  flex-shrink: 0;
}
.weight-suffix {
  font-size: 13px;
  font-weight: 300;
  color: var(--text-mid);
}

/* ── SECTION DIVIDER ── */
.reg-divider {
  border: none;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  margin: 40px 0;
}

/* ── SIMPLE RADIO (connect_with) ── */
.radio-simple-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.radio-simple-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 300;
  color: var(--text-dark);
  user-select: none;
}
.radio-simple-label input[type="radio"] { display: none; }
.radio-dot-simple {
  width: 18px; height: 18px;
  border: 1.5px solid #c8c8c8;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s;
  background-color: #ffffff;
}
.radio-dot-simple::after {
  content: '';
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--mint-dark);
  opacity: 0;
  transition: opacity 0.2s;
}
.radio-simple-label.selected .radio-dot-simple { border-color: var(--mint-dark); }
.radio-simple-label.selected .radio-dot-simple::after { opacity: 1; }

/* ── CHAR COUNTER ── */
.char-counter {
  text-align: right;
  font-size: 11px;
  color: var(--text-light);
  margin-top: 5px;
  transition: color 0.2s;
}
.char-counter.over { color: var(--error); }

/* ── TERMS CHECKBOX ── */
.terms-group {
  margin-top: 40px;
  margin-bottom: 28px;
}
.terms-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 300;
  color: var(--text-mid);
  user-select: none;
}
.terms-label input[type="checkbox"] { display: none; }
.terms-check-box {
  width: 20px; height: 20px;
  border: 1.5px solid #c8c8c8;
  border-radius: 4px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s, background 0.2s;
}
.terms-check-box::after {
  content: '✓';
  font-size: 12px;
  color: var(--white);
  opacity: 0;
  transition: opacity 0.2s;
}
.terms-label.checked .terms-check-box {
  border-color: var(--mint-dark);
  background: var(--mint-dark);
}
.terms-label.checked .terms-check-box::after { opacity: 1; }
.terms-label a {
  color: var(--mint-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── VALIDATION ERROR ── */
.error-msg {
  font-size: 12px;
  color: var(--error);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.error-msg::before { content: '！'; }
.form-input.is-error,
.form-select.is-error,
.form-textarea.is-error {
  border-color: var(--error);
}
.alert-error {
  background: #fff0f0;
  border: 1px solid #ffcccc;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 28px;
  font-size: 13px;
  color: #c00;
}
.alert-error ul { padding-left: 20px; }
.alert-error li { margin-bottom: 4px; }

/* ── SUBMIT BUTTON ── */
.submit-area { margin-top: 4px; }
.submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  background: linear-gradient(90deg, var(--mint-dark) 0%, var(--mint-blue) 100%);
  color: var(--white);
  border: none;
  padding: 18px 24px;
  border-radius: 50px;
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-size: 14px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: opacity 0.25s, transform 0.25s;
  box-shadow: 0 4px 20px rgba(109, 207, 196, 0.35);
}
.submit-btn:hover { opacity: 0.85; transform: translateY(-2px); }
.submit-btn:hover .btn-arrow { transform: translateX(6px); }

/* ── NOTE BOX ── */
.reg-note-box {
  margin-top: 24px;
  background: rgba(255, 255, 255, 0.65);
  border-radius: 10px;
  padding: 20px 24px;
  font-size: 12px;
  font-weight: 300;
  color: var(--text-mid);
  line-height: 2;
  letter-spacing: 0.04em;
  text-align: center;
}

/* ── FORM NOTE ── */
.form-note {
  font-size: 11px;
  color: var(--text-light);
  margin-top: 6px;
  line-height: 1.7;
}

/* ── OPTIONAL QUESTION ── */
.optional-select { margin-bottom: 12px; }
.optional-answer-area { transition: opacity 0.3s; }

/* ── THANKS PAGE ── */
.thanks-wrapper {
  max-width: 600px;
  margin: 0 auto;
  padding: 80px 40px 120px;
  text-align: center;
}
.thanks-icon {
  font-size: 48px;
  margin-bottom: 32px;
  color: var(--mint-dark);
}
.thanks-title {
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  color: var(--text-dark);
}
.thanks-body {
  font-size: 14px;
  font-weight: 300;
  line-height: 2.2;
  color: var(--text-mid);
  margin-bottom: 48px;
}
.thanks-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, var(--mint-dark) 0%, var(--mint-blue) 100%);
  color: var(--white);
  padding: 16px 44px;
  border-radius: 50px;
  font-size: 14px;
  letter-spacing: 0.12em;
  box-shadow: 0 4px 20px rgba(109, 207, 196, 0.35);
  transition: opacity 0.25s, transform 0.25s;
}
.thanks-home-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ── FOOTER ── */
footer {
  background: transparent;
  padding: 0 40px 48px;
  text-align: center;
}
.footer-rule {
  border: none;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  margin: 0 0 48px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.footer-logo img { height: 36px; width: auto; }
.footer-contact-btn {
  font-size: 13px;
  font-weight: 300;
  color: var(--text-mid);
  letter-spacing: 0.1em;
  transition: color 0.2s;
}
.footer-contact-btn:hover { color: var(--mint-dark); }
.footer-nav { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.footer-nav a {
  font-size: 11px;
  font-weight: 300;
  color: var(--text-light);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--mint-dark); }
.footer-nav .sep { font-size: 11px; color: rgba(0,0,0,0.15); }
.footer-copy { font-size: 11px; color: var(--text-light); letter-spacing: 0.06em; }

/* ── PC: ラベル横並びレイアウト（ニックネーム〜タバコ） ── */
@media (min-width: 769px) {
  .reg-page-inner {
    max-width: 640px;
  }
  .reg-basic-section .form-group {
    display: grid;
    grid-template-columns: 152px 1fr;
    column-gap: 20px;
    align-items: start;
  }
  .reg-basic-section .form-group .form-label {
    padding-top: 13px; /* input の padding-top に揃える */
    margin-bottom: 0;
  }
  /* ラベル以外の直接子要素はすべてカラム2へ */
  .reg-basic-section .form-group > *:not(.form-label) {
    grid-column: 2;
  }
  /* ラジオグループは少し下げて入力欄と揃える */
  .reg-basic-section .form-group .radio-inline-group {
    padding-top: 6px;
  }
}

/* ── SP responsive ── */
@media (max-width: 768px) {
  #header { padding: 0 24px; }
  .reg-page-inner { padding: 48px 24px 80px; }
  .birth-year-wrap  { width: 100px; }
  .birth-month-wrap { width: 68px; }
  .birth-day-wrap   { width: 68px; }
  .reg-required-note { font-size: 10px; top: 38px; }
  footer { padding: 0 24px 40px; }
}