/* =========================================================
 *  割り勘link  —  shared stylesheet
 * ========================================================= */

:root {
  --paper: #f5f1e8;
  --paper-deep: #ebe5d4;
  --ink: #1a1614;
  --ink-soft: #3d3530;
  --ink-mute: #7a6f66;
  --line: #c9bfb0;
  --line-soft: #d9d0c1;
  --vermilion: #c0392b;
  --vermilion-deep: #962618;
  --vermilion-soft: #e57063;
  --gold: #b8935a;
  --paypay: #ff0033;
  --ok: #2f7d4f;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: 'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(184,147,90,0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(192,57,43,0.03) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3CfeColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0 0.06 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)'/%3E%3C/svg%3E");
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}

.display-font { font-family: 'Shippori Mincho', 'Yu Mincho', serif; }
.mono-font    { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }

/* -------- Layout -------- */
.device-frame {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 32px 24px 96px;
  position: relative;
}

/* -------- Brand -------- */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  width: 36px;
  height: 36px;
  background: var(--vermilion);
  color: var(--paper);
  display: grid;
  place-items: center;
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 18px;
  border-radius: 4px;
  transform: rotate(-3deg);
  box-shadow: 2px 2px 0 var(--ink);
}
.brand-name {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.05em;
}
.brand-name .accent { font-weight: 400; color: var(--vermilion); }
.brand-sub {
  font-size: 10px;
  color: var(--ink-mute);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* -------- Page header -------- */
.page-title {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.page-title .accent { color: var(--vermilion); }
.page-sub {
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 28px;
}

/* -------- Banner (keishawari import) -------- */
.banner {
  background: linear-gradient(135deg, rgba(192,57,43,0.08), rgba(184,147,90,0.06));
  border: 1px solid rgba(192,57,43,0.2);
  border-left: 3px solid var(--vermilion);
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 24px;
  font-size: 12px;
  line-height: 1.7;
}
.banner strong {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  color: var(--vermilion);
}

/* -------- Mode tabs -------- */
.mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--paper-deep);
  border-radius: 100px;
  padding: 4px;
  margin-bottom: 20px;
}
.mode-tabs button {
  background: transparent;
  border: none;
  padding: 10px 12px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--ink-mute);
  cursor: pointer;
  transition: all 0.2s;
}
.mode-tabs button.active {
  background: var(--ink);
  color: var(--paper);
  font-weight: 700;
}

/* -------- Form -------- */
.form-section { margin-bottom: 24px; }
.form-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 6px;
}
.form-label-text {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.form-label-required {
  font-size: 10px;
  color: var(--vermilion);
  letter-spacing: 0.1em;
  background: rgba(192,57,43,0.08);
  padding: 2px 6px;
  border-radius: 100px;
}
.form-label-optional {
  font-size: 10px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  transition: border-color 0.2s;
  appearance: none;
}
.form-select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%237a6f66' d='M5 6L0 0h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 4px center; padding-right: 20px; }
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-bottom-color: var(--vermilion);
}
.form-input::placeholder, .form-textarea::placeholder {
  color: var(--ink-mute);
  opacity: 0.5;
}
.form-textarea {
  resize: vertical;
  min-height: 60px;
  font-size: 14px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-hint {
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 4px;
}
.form-error {
  font-size: 11px;
  color: var(--vermilion);
  margin-top: 4px;
  display: none;
}
.form-error.show { display: block; }

/* -------- Form group card -------- */
.form-group-card {
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 24px;
}
.form-group-title {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.form-group-icon {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}
.form-group-icon.paypay { background: var(--paypay); color: white; }
.form-group-icon.bank   { background: var(--ink); color: var(--paper); }
.form-group-sub {
  font-size: 11px;
  color: var(--ink-mute);
  margin-bottom: 16px;
}
.form-group-card.dimmed { opacity: 0.55; }

/* -------- Splits editor -------- */
.split-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.split-row {
  display: grid;
  grid-template-columns: 1fr 120px 32px;
  gap: 8px;
  align-items: center;
  background: rgba(255,255,255,0.7);
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--line-soft);
}
.split-row input {
  border: none;
  background: transparent;
  font-size: 14px;
  font-family: inherit;
  padding: 6px 4px;
  border-bottom: 1px dashed var(--line-soft);
}
.split-row input:focus { outline: none; border-bottom-color: var(--vermilion); }
.split-row input.amount {
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
}
.split-row .remove-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-mute);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.15s;
}
.split-row .remove-btn:hover {
  background: var(--vermilion);
  color: white;
  border-color: var(--vermilion);
}
.split-add-btn {
  width: 100%;
  background: transparent;
  border: 1px dashed var(--line);
  color: var(--ink-soft);
  padding: 10px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.split-add-btn:hover { border-color: var(--vermilion); color: var(--vermilion); }
.split-total {
  display: flex;
  justify-content: space-between;
  padding: 12px 4px 0;
  font-size: 12px;
  border-top: 1px dashed var(--line);
  margin-top: 12px;
}
.split-total .num {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--ink);
}

/* -------- Submit button -------- */
.submit-btn {
  width: 100%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 18px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  font-family: inherit;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.submit-btn:hover {
  background: var(--vermilion);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(192,57,43,0.3);
}
.submit-btn::after {
  content: "→";
  margin-left: 12px;
  transition: transform 0.2s;
  display: inline-block;
}
.submit-btn:hover::after { transform: translateX(4px); }
.submit-btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  background: var(--ink);
}

.privacy-note {
  text-align: center;
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 16px;
  line-height: 1.6;
}

/* -------- Share screen -------- */
.complete-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: var(--vermilion);
  color: var(--paper);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 32px;
  font-weight: 700;
  transform: rotate(-5deg);
  box-shadow: 3px 3px 0 var(--ink);
}
.complete-title {
  text-align: center;
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}
.complete-sub {
  text-align: center;
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 28px;
}

.link-card {
  background: var(--ink);
  color: var(--paper);
  border-radius: 8px;
  padding: 22px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.link-card::before {
  content: "";
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: var(--vermilion);
  border-radius: 50%;
  opacity: 0.3;
  filter: blur(20px);
}
.link-card-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(245,241,232,0.55);
  margin-bottom: 12px;
}
.link-card-url {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  word-break: break-all;
  margin-bottom: 16px;
  line-height: 1.55;
  background: rgba(0,0,0,0.3);
  padding: 10px 12px;
  border-radius: 4px;
  max-height: 96px;
  overflow-y: auto;
}
.link-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.link-action-btn {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--paper);
  padding: 12px;
  font-size: 12px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}
.link-action-btn:hover { background: rgba(255,255,255,0.2); }
.link-action-btn.primary {
  background: var(--vermilion);
  border-color: var(--vermilion);
}
.link-action-btn.primary:hover { background: var(--vermilion-deep); }

.qr-card {
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 22px;
  text-align: center;
  margin-bottom: 20px;
}
.qr-canvas-wrap {
  width: 200px;
  height: 200px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
}
.qr-canvas-wrap canvas, .qr-canvas-wrap img, .qr-canvas-wrap svg {
  width: 100%;
  height: 100%;
  display: block;
}
.qr-label {
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}

.warning-card {
  background: rgba(184,147,90,0.08);
  border-left: 3px solid var(--gold);
  padding: 14px 16px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.7;
}
.warning-card strong {
  color: var(--ink);
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
}

/* -------- Pay screen -------- */
.pay-header {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--line);
}
.pay-title {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 18px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.pay-payee {
  font-size: 12px;
  color: var(--ink-mute);
  margin-bottom: 12px;
}
.pay-payee .name { color: var(--ink); font-weight: 600; }
.pay-amount {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  margin: 8px 0 4px;
  letter-spacing: -0.02em;
}
.pay-amount .yen {
  font-size: 24px;
  color: var(--ink-mute);
  margin-right: 4px;
  vertical-align: super;
}
.pay-memo {
  font-size: 13px;
  color: var(--ink-mute);
  margin-top: 8px;
}

.pay-section-label {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pay-section-label::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--ink);
}

/* PayPay button */
.paypay-btn {
  width: 100%;
  background: var(--paypay);
  color: white;
  border: none;
  padding: 20px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
  transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(255,0,51,0.25);
  text-decoration: none;
}
.paypay-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,0,51,0.35);
}
.paypay-btn-icon {
  background: white;
  color: var(--paypay);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: -0.05em;
}
.paypay-id-display {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  padding: 12px;
  border-radius: 6px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  margin-top: 8px;
  letter-spacing: 0.05em;
}
.paypay-hint {
  font-size: 11px;
  color: var(--ink-mute);
  text-align: center;
  margin-bottom: 28px;
  line-height: 1.6;
}

/* Divider */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0;
  color: var(--ink-mute);
  font-size: 11px;
  letter-spacing: 0.2em;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Bank card */
.bank-card {
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 4px 20px;
  margin-bottom: 12px;
}
.bank-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}
.bank-row:last-child { border-bottom: none; }
.bank-row-label {
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}
.bank-row-value {
  font-size: 15px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: right;
}
.bank-row-value .num {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
}
.copy-btn {
  background: var(--paper-deep);
  border: 1px solid var(--line);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 11px;
  color: var(--ink-soft);
  transition: all 0.2s;
  flex-shrink: 0;
}
.copy-btn:hover { background: var(--ink); color: var(--paper); }

.copy-all-btn {
  width: 100%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  font-family: inherit;
  cursor: pointer;
  margin-bottom: 8px;
  transition: all 0.2s;
}
.copy-all-btn:hover { background: var(--vermilion); }

/* -------- Recipient selector (split mode) -------- */
.recipient-picker {
  background: white;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 24px;
}
.recipient-picker-title {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}
.recipient-picker-sub {
  font-size: 11px;
  color: var(--ink-mute);
  margin-bottom: 14px;
}
.recipient-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.recipient-btn {
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 12px 14px;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.15s;
  text-align: left;
}
.recipient-btn:hover {
  border-color: var(--vermilion);
  background: white;
  transform: translateX(2px);
}
.recipient-btn.selected {
  border-color: var(--vermilion);
  background: rgba(192,57,43,0.06);
}
.recipient-btn .name { font-weight: 500; }
.recipient-btn .amount {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--vermilion);
}
.recipient-summary {
  background: var(--paper-deep);
  border-radius: 8px;
  padding: 12px 14px;
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
}
.recipient-summary .num { font-family: 'JetBrains Mono', monospace; font-weight: 700; }

/* Empty / error states */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-mute);
}
.empty-state .icon {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 48px;
  color: var(--line);
  margin-bottom: 12px;
}
.empty-state .title {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 8px;
}
.empty-state .sub { font-size: 12px; }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
  z-index: 200;
  white-space: nowrap;
  max-width: calc(100vw - 48px);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Footer */
.footer-note {
  text-align: center;
  font-size: 10px;
  color: var(--ink-mute);
  margin-top: 32px;
  letter-spacing: 0.1em;
}
.footer-note a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px dotted var(--line); }
.footer-note a:hover { color: var(--vermilion); }

/* Hidden helpers */
.is-hidden { display: none !important; }