:root {
  --green-900: #1b4332;
  --green-700: #2d6a4f;
  --green-500: #40916c;
  --green-300: #74c69d;
  --green-100: #d8f3dc;
  --amber: #e9c46a;
  --red: #e76f51;
  --bg: #f4f9f6;
  --card: #ffffff;
  --text: #1b2a22;
  --muted: #6b7d72;
  --line: #dce8e1;
  --shadow: 0 2px 14px rgba(27, 67, 50, 0.08);
  --radius: 14px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
}

header {
  background: linear-gradient(120deg, var(--green-900), var(--green-700));
  color: #fff;
  padding: 20px 16px 16px;
  text-align: center;
  position: relative;
}

header h1 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

header .sub {
  margin: 6px 0 0;
  font-size: 0.82rem;
  opacity: 0.92;
}

.sdg-pill {
  display: inline-block;
  margin-top: 8px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
}

h2 .sdg-pill {
  margin-top: 0;
  margin-left: 8px;
  vertical-align: middle;
  color: var(--green-900);
  background: var(--green-100);
  border-color: var(--green-300);
}

h2 .sdg-pill.ok {
  background: #e8f6ee;
  border-color: var(--green-500);
}

h2 .sdg-pill.bad {
  background: #fff4e6;
  border-color: var(--amber);
  color: #7a4b12;
}

.steps {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 14px auto 0;
  max-width: 640px;
  flex-wrap: wrap;
}

.step-btn {
  border: none;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 7px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  cursor: pointer;
}

.step-btn.active {
  background: #fff;
  color: var(--green-900);
  font-weight: 700;
}

.step-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.userBar {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.78rem;
  display: none;
  align-items: center;
  gap: 8px;
}

.userBar button,
.ghost {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: #fff;
  padding: 4px 10px;
  border-radius: 14px;
  cursor: pointer;
  font-size: 0.75rem;
}

main {
  max-width: 760px;
  margin: 20px auto;
  padding: 0 14px 80px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.08rem;
  color: var(--green-900);
  border-left: 4px solid var(--green-500);
  padding-left: 10px;
}

.card h3 {
  font-size: 0.95rem;
  color: var(--green-700);
  margin: 16px 0 6px;
}

label {
  display: block;
  font-size: 0.85rem;
  margin: 10px 0 4px;
  color: var(--muted);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid #cfe3d7;
  border-radius: 8px;
  font-size: 0.9rem;
  background: #fbfefb;
  font-family: inherit;
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.row > div {
  flex: 1;
  min-width: 120px;
}

.btn {
  background: var(--green-500);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 12px;
}

.btn:hover { background: var(--green-700); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.secondary {
  background: #fff;
  color: var(--green-700);
  border: 1px solid var(--green-500);
}
.btn.danger { background: var(--red); }
.btn.small {
  padding: 5px 10px;
  font-size: 0.78rem;
  margin: 0;
}
.btn.full { width: 100%; }

.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tabbar, .authTabbar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.tabbar button, .authTabbar button {
  flex: 1;
  padding: 9px;
  border-radius: 8px;
  border: 1px solid var(--green-300);
  background: #fff;
  color: var(--green-700);
  cursor: pointer;
  font-size: 0.85rem;
}

.tabbar button.active, .authTabbar button.active {
  background: var(--green-500);
  color: #fff;
  border-color: var(--green-500);
}

.pane, .authPane { display: none; }
.pane.active, .authPane.active { display: block; }

.hint {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.55;
  background: var(--green-100);
  padding: 8px 10px;
  border-radius: 8px;
  margin-top: 8px;
}

.hint.warn {
  background: #fff4e6;
  color: #7a4b12;
}

#photoPreview {
  max-width: 100%;
  max-height: 220px;
  border-radius: 10px;
  margin-top: 10px;
  display: none;
}

.predictBox {
  margin-top: 10px;
  padding: 10px;
  border-radius: 8px;
  background: #f0f7f2;
  font-size: 0.85rem;
  display: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  margin-top: 8px;
}

.table-wrap { overflow-x: auto; }

th, td {
  padding: 7px 6px;
  border-bottom: 1px solid #e5efe8;
  text-align: left;
}

th { color: var(--green-700); }
td.numcell input { width: 72px; padding: 5px 6px; }
td.sub {
  color: var(--green-700);
  font-weight: 600;
  white-space: nowrap;
}

.entryList {
  list-style: none;
  padding: 0;
  margin: 8px 0;
}

.entryList li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px dashed #e0ece4;
  font-size: 0.85rem;
}

.tag {
  display: inline-block;
  background: var(--green-100);
  color: var(--green-900);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.72rem;
  margin-left: 6px;
}

.subtotal {
  text-align: right;
  font-weight: 700;
  color: var(--green-700);
  margin-top: 6px;
}

.bigNumber {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--green-700);
  text-align: center;
}

.bigNumber span {
  font-size: 1rem;
  color: var(--muted);
}

.equivBox, .statBox {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.equivItem, .statItem {
  flex: 1;
  min-width: 130px;
  background: #f0f7f2;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.equivItem .n, .statItem .n {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--green-700);
}

.equivItem .l, .statItem .l {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

.intent {
  display: grid;
  gap: 10px;
  margin: 12px 0 4px;
}

.intent div {
  background: #f0f7f2;
  border-radius: 10px;
  padding: 12px 14px;
}

.intent b { color: var(--green-900); display: block; margin-bottom: 4px; }
.intent p { margin: 0; font-size: 0.84rem; color: var(--muted); line-height: 1.5; }

footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  padding: 8px 16px 24px;
}

.disclaimer {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  margin-top: 10px;
  line-height: 1.5;
}

.loader {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid #cfe3d7;
  border-top-color: var(--green-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 6px;
  vertical-align: middle;
}

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

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--green-900);
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 50;
}

.toast.show { opacity: 1; }

.empty {
  color: #9aa;
  font-size: 0.85rem;
  padding: 8px 0;
}

@media (max-width: 640px) {
  .userBar {
    position: static;
    justify-content: center;
    margin-top: 8px;
  }
  header { padding-top: 16px; }
}