/* ===== CSS Variables ===== */
:root {
  --color-bg:           #FAF6F0;
  --color-surface:      #FFFFFF;
  --color-surface-soft: #F3ECE0;

  --color-primary:      #3A5A40;
  --color-primary-soft: #588157;
  --color-accent:       #C8553D;

  --color-text:         #1A2B1C;
  --color-text-soft:    #3D4F40;
  --color-text-muted:   #6B6B62;

  --color-border:       #E5DDD0;
  --color-border-focus: #3A5A40;

  --color-error:        #C8553D;
  --color-success:      #3A5A40;

  --font-heading: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --font-body:    'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;

  --max-width: 560px;
  --radius:    6px;
  --radius-card: 8px;
}

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

/* ===== Base ===== */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  padding-bottom: 100px;
}

/* ===== Progress Bar (top) ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-border);
  z-index: 1000;
}

.progress-bar__fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  transition: width 0.4s ease;
}

/* ===== Language Switcher ===== */
.lang-switcher {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0;
  padding: 16px 20px 0;
  max-width: var(--max-width);
  margin: 0 auto;
}

.lang-switcher button {
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-soft);
  cursor: pointer;
  padding: 4px 8px;
  position: relative;
  transition: color 0.2s;
}

.lang-switcher button.active {
  color: var(--color-text);
}

.lang-switcher button.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 8px;
  right: 8px;
  height: 2px;
  background: var(--color-accent);
}

.lang-switcher button:hover {
  color: var(--color-text);
}

.lang-separator {
  width: 1px;
  height: 14px;
  background: var(--color-border);
}

/* ===== Main Container ===== */
.form-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.form-header {
  text-align: center;
  padding: 32px 0 0;
}

.form-header__sub {
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.form-header__property {
  font-family: var(--font-heading);
  font-size: 34px;
  letter-spacing: 0.04em;
  color: var(--color-text);
  font-weight: 600;
}

.form-header__note {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.form-header__note span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== Section ===== */
.form-section {
  margin-top: 64px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: 20px;
}

.section-title::before {
  content: '';
  display: block;
  width: 2px;
  height: 22px;
  background: var(--color-primary);
  flex-shrink: 0;
}

.section-title .check-icon {
  margin-left: auto;
  color: var(--color-success);
  opacity: 0;
  transition: opacity 0.3s ease;
  font-size: 16px;
}

.section-title .check-icon.visible {
  opacity: 1;
}

/* ===== Guest Card ===== */
.guest-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  margin-bottom: 20px;
  animation: cardSlideIn 0.3s ease;
}

@keyframes cardSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.guest-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.guest-card__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
}

.guest-card__remove {
  background: none;
  border: none;
  font-size: 12px;
  color: var(--color-accent);
  cursor: pointer;
  padding: 4px 8px;
  font-family: var(--font-body);
  transition: opacity 0.2s;
}

.guest-card__remove:hover {
  opacity: 0.7;
}

.guest-card__collapse-btn {
  background: none;
  border: none;
  font-size: 12px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px 8px;
  font-family: var(--font-body);
}

.guest-card.collapsed .guest-card__body {
  display: none;
}

.guest-card.collapsed .guest-card__summary {
  display: block;
}

.guest-card__summary {
  display: none;
  font-size: 13px;
  color: var(--color-text-soft);
  padding: 4px 0;
}

/* ===== Form Fields ===== */
.field-row {
  margin-bottom: 20px;
}

.field-row--inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--color-text-soft);
  margin-bottom: 6px;
  font-weight: 400;
}

label .required {
  color: var(--color-accent);
  font-size: 10px;
  margin-left: 4px;
  vertical-align: middle;
}

.input-wrap {
  position: relative;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="number"],
select {
  width: 100%;
  height: 52px;
  padding: 0 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
  transition: border-color 0.2s;
  -webkit-appearance: none;
  appearance: none;
  font-variant-numeric: tabular-nums;
}

input[type="date"] {
  padding-right: 12px;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7568' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--color-border-focus);
}

input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

input.invalid,
select.invalid {
  border-color: var(--color-error);
}

.input-check {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-success);
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.input-check.visible {
  opacity: 1;
}

.field-error {
  font-size: 12px;
  color: var(--color-error);
  margin-top: 4px;
  min-height: 0;
  overflow: hidden;
  transition: all 0.2s;
}

.field-error:empty {
  margin-top: 0;
}

/* ===== Radio Groups ===== */
.radio-group {
  display: flex;
  gap: 24px;
  margin-top: 4px;
}

.radio-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 0;
}

.radio-label input[type="radio"] {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: border-color 0.2s;
}

.radio-label input[type="radio"]:checked {
  border-color: var(--color-primary);
}

.radio-label input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
}

.radio-label input[type="radio"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Checkbox ===== */
.checkbox-label {
  display: inline-flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 0;
}

.checkbox-label input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  min-width: 20px;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  cursor: pointer;
  position: relative;
  margin-top: 2px;
  transition: all 0.2s;
}

.checkbox-label input[type="checkbox"]:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 6px;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-label input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Foreign Block ===== */
.foreign-block {
  border-left: 2px solid var(--color-accent);
  background: var(--color-surface-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 20px 20px 18px;
  margin-top: 16px;
  display: none;
}

.foreign-block.visible {
  display: block;
  animation: cardSlideIn 0.3s ease;
}

.foreign-block__notice {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ===== Passport Upload ===== */
.passport-upload {
  margin-top: 16px;
}

.passport-buttons {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.passport-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.passport-btn:hover {
  background: rgba(58, 90, 64, 0.05);
}

.passport-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.passport-btn input[type="file"] {
  display: none;
}

.passport-preview {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--color-text-soft);
}

.passport-preview.visible {
  display: flex;
}

.passport-preview__name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.passport-preview__check {
  color: var(--color-success);
}

.passport-preview__remove {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
}

.passport-security {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== Add Companion Button ===== */
.add-companion-btn {
  width: 100%;
  height: 52px;
  border: 1.5px dashed var(--color-primary);
  border-radius: var(--radius-card);
  background: transparent;
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
  margin-bottom: 8px;
}

.add-companion-btn:hover {
  background: rgba(58, 90, 64, 0.04);
}

.add-companion-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.companion-note {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ===== Agreement Section ===== */
.agreement-item {
  margin-bottom: 16px;
}

.agreement-detail {
  margin-top: 8px;
  margin-left: 30px;
}

.agreement-toggle {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font-body);
  text-decoration: underline;
  padding: 0;
}

.agreement-content {
  display: none;
  font-size: 12px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-top: 8px;
  padding: 12px 16px;
  background: var(--color-surface-soft);
  border-radius: var(--radius);
}

.agreement-content.open {
  display: block;
}

/* ===== Submit Bar ===== */
.submit-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  background: rgba(250, 246, 240, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
}

.submit-btn {
  display: block;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  height: 56px;
  border: none;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: white;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.submit-btn:hover {
  background: var(--color-primary-soft);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.submit-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.submit-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.submit-btn.loading .submit-spinner {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Gender field ===== */
.gender-options {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.gender-options .radio-label {
  font-size: 14px;
}

/* ===== Thanks Page ===== */
.thanks-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.thanks-card {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 60px 40px 48px;
  max-width: 480px;
  width: 100%;
  text-align: center;
}

.thanks-leaf {
  width: 48px;
  height: 48px;
  margin: 0 auto 32px;
  color: var(--color-primary);
}

.thanks-title {
  font-family: var(--font-heading);
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.thanks-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.thanks-divider {
  width: 40px;
  height: 2px;
  background: var(--color-primary);
  margin: 0 auto 28px;
}

.thanks-property {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.thanks-checkin {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-bottom: 32px;
}

.thanks-message {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
}

.thanks-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-muted);
}

.thanks-footer a {
  color: var(--color-text-soft);
  text-decoration: none;
}

/* ===== Error Page ===== */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.error-card {
  max-width: 480px;
  width: 100%;
  text-align: center;
  padding: 60px 40px;
}

.error-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin: 0 auto 24px;
}

.error-title {
  font-family: var(--font-heading);
  font-size: 22px;
  color: var(--color-text);
  margin-bottom: 16px;
}

.error-message {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 32px;
}

.error-contact {
  font-size: 13px;
  color: var(--color-text-muted);
}

.error-contact a {
  color: var(--color-text-soft);
  text-decoration: none;
}

/* ===== Utilities ===== */
[aria-live] {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

[aria-live].visible-live {
  clip: auto;
  clip-path: none;
  height: auto;
  overflow: visible;
  position: static;
  white-space: normal;
  width: auto;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .form-container {
    padding: 0 16px;
  }

  .guest-card {
    padding: 24px 18px;
  }

  .field-row--inline {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .thanks-card {
    padding: 48px 24px 36px;
  }

  .passport-buttons {
    flex-direction: column;
  }
}