/* 春日小清新：浅绿 + 浅蓝 */
:root {
  --mint: #e8f5ef;
  --mint-deep: #c5e8d4;
  --sky: #e3f2fd;
  --sky-deep: #b3d9f2;
  --leaf: #7cb88a;
  --leaf-dark: #4a9b6a;
  --text: #2d4a3e;
  --text-soft: #5a7d6e;
  --white: #fefffe;
  --shadow: rgba(74, 155, 106, 0.12);
  --radius: 18px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei",
    "Noto Sans SC", sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(
    165deg,
    var(--mint) 0%,
    var(--sky) 45%,
    #f0faf4 100%
  );
  background-attachment: fixed;
}

/* 背景柔光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 80% 50% at 20% 10%, rgba(181, 233, 200, 0.35), transparent),
    radial-gradient(ellipse 60% 40% at 85% 70%, rgba(179, 217, 242, 0.4), transparent);
  z-index: 0;
}

.app {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  min-height: 100vh;
}

header.hero {
  text-align: center;
  margin-bottom: 1.75rem;
}

header.hero h1 {
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--leaf-dark);
  margin: 0 0 0.5rem;
}

header.hero p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.panel {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--shadow);
  border: 1px solid rgba(124, 184, 138, 0.2);
  padding: 1.35rem 1.25rem;
  margin-bottom: 1rem;
}

/* 欢迎页 */
.welcome .panel h2 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
  color: var(--leaf-dark);
}

.welcome .panel ul {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.88rem;
  color: var(--text-soft);
  line-height: 1.75;
}

.btn-primary {
  display: block;
  width: 100%;
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  color: #fff;
  background: linear-gradient(135deg, var(--leaf) 0%, var(--leaf-dark) 100%);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(74, 155, 106, 0.28);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(74, 155, 106, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

/* 进度 */
.progress-wrap {
  margin-bottom: 1rem;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-soft);
  margin-bottom: 0.35rem;
}

.progress-bar {
  height: 8px;
  background: var(--mint-deep);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--sky-deep), var(--leaf));
  border-radius: 999px;
  transition: width 0.35s ease;
}

/* 题目 */
.quiz-panel .q-meta {
  font-size: 0.75rem;
  color: var(--text-soft);
  margin-bottom: 0.35rem;
}

.quiz-panel .q-text {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.55;
  margin: 0 0 1.1rem;
  color: var(--text);
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 0.92rem;
  color: var(--text);
  background: linear-gradient(135deg, rgba(232, 245, 239, 0.9), rgba(227, 242, 253, 0.85));
  border: 2px solid transparent;
  border-radius: 14px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}

.option:hover {
  border-color: var(--mint-deep);
  transform: translateX(2px);
}

.option:focus-visible {
  outline: 2px solid var(--leaf);
  outline-offset: 2px;
}

.option.selected {
  border-color: var(--leaf-dark);
  background: linear-gradient(135deg, var(--mint-deep), var(--sky-deep));
}

.quiz-nav {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn-secondary {
  flex: 1;
  padding: 0.7rem 1rem;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--leaf-dark);
  background: var(--white);
  border: 2px solid var(--mint-deep);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--mint);
  border-color: var(--leaf);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* 结果 */
.result-panel h2 {
  font-size: 1.2rem;
  color: var(--leaf-dark);
  margin: 0 0 0.25rem;
  text-align: center;
}

.result-city {
  font-size: 1.65rem;
  font-weight: 600;
  text-align: center;
  margin: 0.5rem 0 1rem;
  letter-spacing: 0.08em;
  color: var(--text);
}

.season-note {
  font-size: 0.82rem;
  color: var(--text-soft);
  text-align: center;
  margin: 0 0 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--mint);
  border-radius: 10px;
  line-height: 1.5;
}

.result-section {
  margin-bottom: 1rem;
}

.result-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--leaf-dark);
  margin: 0 0 0.45rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--mint-deep);
}

.result-section p,
.result-section li {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-soft);
  margin: 0;
}

.result-section ul {
  margin: 0;
  padding-left: 1.15rem;
}

.rules-peek {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--mint-deep);
}

.rules-peek summary {
  font-size: 0.8rem;
  color: var(--text-soft);
  cursor: pointer;
  user-select: none;
}

.rules-peek pre {
  margin: 0.75rem 0 0;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--text-soft);
  white-space: pre-wrap;
  word-break: break-all;
}

.hidden {
  display: none !important;
}

footer.note {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-soft);
  margin-top: 1.5rem;
  opacity: 0.85;
}