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

:root {
  --card:    #2e2e2e;
  --surface: #383838;
  --line:    rgba(255,255,255,.12);
  --text:    #ffffff;
  --muted:   rgba(255,255,255,.6);
  --accent:  #a6e22e;
  --accent2: #82b224;
  --success: #4caf7d;
  --warn:    #ffb74d;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  background: var(--card);
  color: var(--text);
  min-height: 100vh;
  padding: 24px 16px 48px;
}

.wrap { max-width: 640px; margin: 0 auto; }

.back-nav {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.back-link {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  transition: color .15s, border-color .15s;
}

.back-link:hover { color: #fff; border-color: rgba(255,255,255,.4); }

h1 {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .02em;
  margin-bottom: 20px;
}

/* ===== Tabs ===== */
.tabs { display: flex; gap: 8px; margin-bottom: 20px; }

.tab {
  flex: 1;
  padding: 10px 8px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}

.tab.active { background: var(--accent); border-color: var(--accent); color: #1a1a1a; }
.tab:hover:not(.active) { background: rgba(255,255,255,.06); }

/* ===== Card ===== */
.card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ===== Section title ===== */
.section-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ===== Size inputs ===== */
.size-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.size-field { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); }

.size-field input {
  width: 90px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  text-align: right;
  outline: none;
  transition: border-color .15s;
}

.size-field input:focus { border-color: var(--accent); }

.size-op { color: var(--muted); font-size: 20px; }

.area-badge {
  background: rgba(166,226,46,.2);
  border: 1px solid rgba(166,226,46,.4);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 15px;
  font-weight: 700;
  color: #c3e88d;
  white-space: nowrap;
}

.tier-note { margin-top: 8px; font-size: 13px; color: var(--muted); min-height: 1.4em; }

/* ===== Quantity ===== */
.qty-row { display: flex; align-items: center; gap: 8px; }

.qty-row input {
  width: 130px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 18px;
  text-align: right;
  outline: none;
  transition: border-color .15s;
}

.qty-row input:focus { border-color: var(--accent); }
.qty-unit { font-size: 15px; color: var(--muted); }
.qty-note { margin-top: 8px; font-size: 13px; color: var(--muted); min-height: 1.4em; }

/* ===== Menu select ===== */
.menu-select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  cursor: pointer;
  transition: border-color .15s;
}

.menu-select:focus { border-color: var(--accent); }

.hidden { display: none !important; }

/* ===== Calculate button ===== */
.calc-btn {
  width: 100%;
  padding: 16px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1a1a1a;
  font-family: "Saira Stencil One", sans-serif;
  font-size: 18px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
}

.calc-btn:hover { opacity: .9; }
.calc-btn:active { transform: scale(.98); }

.order-cta{
  margin-top: 24px;
  text-align: center;
}
.order-cta p{
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}
.order-cta a{
  display: inline-block;
  padding: 12px 32px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1a1a1a;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: opacity .15s;
}
.order-cta a:hover{ opacity: .9; }

/* ===== Result ===== */
.result {
  background: rgba(76,175,125,.08);
  border: 1px solid rgba(76,175,125,.3);
  border-radius: 14px;
  padding: 20px;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.result-item { display: flex; flex-direction: column; gap: 4px; }

.result-label { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: .05em; }

.result-value { font-size: 22px; font-weight: 700; color: #fff; font-variant-numeric: tabular-nums; }

.result-divider { grid-column: 1 / -1; height: 1px; background: rgba(76,175,125,.3); }

.result-item.highlight .result-value { font-size: 28px; color: #6dffb0; }

.result-applied { margin-top: 14px; font-size: 12px; color: var(--muted); line-height: 1.7; }

/* ===== Shipping ===== */
.shipping-box {
  margin-top: 14px;
  border-top: 1px solid rgba(255,183,77,.3);
  padding-top: 14px;
}

.shipping-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 14px;
  color: var(--warn);
  font-weight: 600;
}

.grand-total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0 4px;
  border-top: 1px solid rgba(255,183,77,.2);
  margin-top: 4px;
}

.grand-total-label { font-size: 13px; font-weight: 700; color: var(--warn); }

.grand-total-value { font-size: 26px; font-weight: 700; color: var(--warn); font-variant-numeric: tabular-nums; }

.shipping-note { margin-top: 6px; font-size: 11px; color: rgba(255,183,77,.7); }

/* ===== Order text ===== */
.order-text-section {
  margin-top: 18px;
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 16px;
}

.order-text-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.order-text-guide {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.order-textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: "Noto Sans JP", sans-serif;
  font-size: 12.5px;
  line-height: 1.7;
  resize: vertical;
  outline: none;
}

.order-textarea:focus { border-color: var(--accent); }

.order-text-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.order-text-btn {
  flex: 1;
  min-width: 140px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .15s, background .15s;
}

.order-text-btn:hover { background: rgba(255,255,255,.08); }

.order-text-btn.primary {
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1a1a1a;
}

.order-text-btn.primary:hover { opacity: .9; }

.copy-feedback {
  margin-top: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: #6dffb0;
  text-align: center;
}

/* ===== Error ===== */
.error-box {
  background: rgba(255,80,80,.1);
  border: 1px solid rgba(255,80,80,.3);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  color: #ff9090;
}

@media (max-width: 480px) {
  h1 { font-size: 18px; }
  .result-grid { grid-template-columns: 1fr; }
  .result-divider { display: none; }
}

.page-header{ display: flex; align-items: center; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.header-logo{ height: 36px; width: auto; display: block; }