:root {
  --paper: #f5f8fa;
  --card: #ffffff;
  --ink: #22303c;
  --ink-soft: #5f6f7c;
  --accent: #0ea5a4;
  --accent-dark: #0b7f7e;
  --line: #dde6ea;
  --gold: #17b8a8;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 50% -100px, rgba(14, 165, 164, .08), transparent 60%),
    radial-gradient(900px 500px at 85% 110%, rgba(59, 130, 246, .05), transparent 60%),
    var(--paper);
  line-height: 1.6;
}

header { text-align: center; padding: 40px 16px 8px; }
.logo { font-size: 30px; letter-spacing: 6px; }
.sub { color: var(--ink-soft); margin-top: 6px; font-size: 14px; letter-spacing: 4px; }

main { max-width: 560px; margin: 0 auto; padding: 16px 16px 48px; }

.tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.tab {
  flex: 1;
  padding: 9px 0;
  font: inherit;
  font-size: 15px;
  letter-spacing: 1px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink-soft);
  cursor: pointer;
}
.tab:hover { border-color: var(--accent); color: var(--accent); }
.tab.active {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
  font-weight: bold;
}

.nums { display: flex; gap: 8px; margin-bottom: 14px; }
.nums input {
  flex: 1;
  min-width: 0;
  padding: 12px 8px;
  font: inherit;
  font-size: 16px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfe;
  color: var(--ink);
}
.nums input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

.hubian { font-size: 14.5px; color: var(--ink); margin-bottom: 8px; }

.panel, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(34, 48, 60, .05);
}

.panel { padding: 20px; }

.ask-hint { font-size: 12.5px; color: var(--ink-soft); margin-bottom: 10px; }
.asks { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.ask {
  font: inherit;
  font-size: 13px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.ask:hover { border-color: var(--accent); color: var(--accent); }
.ask.active { border-color: var(--accent); color: var(--accent); background: rgba(14, 165, 164, .08); }

#seed {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfe;
  color: var(--ink);
}
#seed:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

.modes { display: flex; gap: 8px; margin: 14px 0 4px; }
.mode {
  flex: 1;
  padding: 9px 0;
  font: inherit;
  font-size: 15px;
  letter-spacing: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
.mode.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(14, 165, 164, .08);
}
.mode-hint { font-size: 12px; color: var(--ink-soft); margin: 6px 0 14px; min-height: 18px; }

.cast {
  width: 100%;
  margin-top: 4px;
  padding: 13px 0;
  font: inherit;
  font-size: 18px;
  letter-spacing: 10px;
  text-indent: 10px;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
.cast:hover { background: var(--accent-dark); }
.cast:disabled { opacity: .55; cursor: wait; }

.result { margin-top: 18px; }
.hidden { display: none; }

.hexagram {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
}
.lines { flex: 1; }
.line-row {
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  transition: opacity .45s ease;
}
.line-row.show { opacity: 1; }
.line-label { width: 18px; color: var(--ink-soft); font-size: 13px; text-align: right; flex-shrink: 0; }
.line { height: 10px; flex: 1; }
.line.yang { background: var(--ink); border-radius: 3px; }
.line.yin { display: flex; gap: 12px; }
.line.yin::before, .line.yin::after { content: ""; flex: 1; background: var(--ink); border-radius: 3px; }

.hex-info { min-width: 128px; text-align: center; }
.gua-name { font-size: 19px; letter-spacing: 2px; }
.gua-label {
  display: inline-block;
  margin-top: 5px;
  padding: 1px 10px;
  font-size: 12.5px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
}
.gua-label.label-good { border-color: var(--accent); color: var(--accent); background: rgba(14, 165, 164, .08); }
.gua-label.label-mid { border-color: var(--line); color: var(--ink-soft); }
.gua-label.label-warn { border-color: #d97706; color: #b45309; background: rgba(217, 119, 6, .08); }
.gua-label.label-bad { border-color: #dc2626; color: #b91c1c; background: rgba(220, 38, 38, .07); }
.gua-id { color: var(--ink-soft); font-size: 13px; margin-top: 6px; }

.card { margin-top: 14px; padding: 16px 20px; }
.card h3 { font-size: 15px; color: var(--gold); letter-spacing: 3px; margin-bottom: 10px; border-bottom: 1px dashed var(--line); padding-bottom: 6px; }

.elem-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; }
.elem-name { width: 22px; }
.elem-bar { flex: 1; height: 10px; background: rgba(34, 48, 60, .07); border-radius: 5px; overflow: hidden; }
.elem-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #0ea5a4, #5ebfd6);
  border-radius: 5px;
  transition: width .6s ease;
}
.elem-val { width: 28px; text-align: right; font-size: 13px; }
.elem-val.elem-hot { color: var(--accent); font-weight: bold; }
.elem-val.elem-cold { color: var(--ink-soft); }
.elem-hint { margin-top: 10px; font-size: 12px; color: var(--ink-soft); line-height: 1.6; }
.maxmin { margin-top: 8px; color: var(--ink-soft); font-size: 14px; }
.reading { font-size: 15px; line-height: 1.85; }
.special { white-space: pre-wrap; }

.lucky { display: flex; align-items: center; justify-content: space-between; }
.lucky .card-title { border-bottom: none; margin-bottom: 0; }
.lucky-num { font-size: 34px; color: var(--accent); font-weight: bold; }

.actions { display: flex; gap: 10px; margin-top: 14px; }
.actions button {
  flex: 1;
  padding: 11px 0;
  font: inherit;
  font-size: 15px;
  letter-spacing: 2px;
  border-radius: 8px;
  cursor: pointer;
}
#copy { background: var(--card); border: 1px solid var(--line); color: var(--ink); }
#copy:hover { border-color: var(--accent); color: var(--accent); }
#again { background: var(--accent); border: none; color: #fff; }
#again:hover { background: var(--accent-dark); }

.ad-slot {
  margin-top: 18px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  color: #9aa8b2;
  font-size: 13px;
  letter-spacing: 2px;
}

.promo { margin-top: 18px; }

footer {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 16px 40px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 12.5px;
}
footer p { margin: 4px 0; }
footer a { color: var(--ink-soft); text-decoration: none; }

#toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(10px);
  background: var(--ink);
  color: var(--paper);
  padding: 9px 18px;
  border-radius: 20px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: all .3s ease;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 420px) {
  .hexagram { flex-direction: column; }
  .hex-info { min-width: 0; }
}