/* ============================================================
   BTC 开奖 — btchao.com 全站设计令牌 v1.0
   ============================================================ */

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

html { scroll-behavior: smooth; }

body {
  background: var(--btc-bg);
  color: var(--btc-text);
  font-family: var(--btc-font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--btc-orange); text-decoration: none; }
a:hover { color: var(--btc-orange-hover); }

code, .btc-num { font-family: var(--btc-font-mono); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 251, 242, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--btc-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-size: 19px; font-weight: 700; color: var(--btc-text); letter-spacing: 0.5px;
}
.brand:hover { color: var(--btc-text); }
.brand img { display: block; }
.brand em { font-style: normal; color: var(--btc-orange); }
.nav-links { display: flex; gap: 22px; font-size: 14.5px; }
.nav-links a { color: var(--btc-text-2); }
.nav-links a:hover { color: var(--btc-orange); }

/* ===== 卡片 ===== */
.card {
  background: var(--btc-bg-card);
  border: 1px solid var(--btc-border);
  border-radius: var(--btc-radius);
  box-shadow: var(--btc-shadow);
  padding: 24px;
}

/* ===== 标签 / eyebrow ===== */
.tag {
  display: inline-block;
  background: var(--btc-orange-faint);
  color: var(--btc-orange-hover);
  border-radius: 999px;
  padding: 2px 12px;
  font-size: 12.5px;
}
.eyebrow {
  display: block;
  font-size: 11.5px; font-weight: 700; letter-spacing: 2px;
  color: var(--btc-orange);
  margin-bottom: 4px;
}

/* ===== Hero 今日开奖 ===== */
.hero { margin-top: 28px; text-align: center; padding: 40px 24px 32px; }
.hero-head {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  flex-wrap: wrap; margin-bottom: 10px;
}
.countdown { font-size: 13.5px; color: var(--btc-text-2); }
.countdown b {
  font-family: var(--btc-font-mono); color: var(--btc-orange-hover);
  font-size: 14.5px; font-variant-numeric: tabular-nums;
}
.hero-title { font-size: 22px; font-weight: 700; margin-bottom: 22px; }

.digits { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.digit {
  display: grid; place-items: center;
  font-family: var(--btc-font-mono); font-weight: 700;
  border-radius: var(--btc-radius);
  background: var(--btc-orange); color: #1a1a1a;
  border: 1px solid var(--btc-orange-hover);
}
.digits-lg .digit { width: 68px; height: 88px; font-size: 46px; }
.digits-sm .digit { width: 34px; height: 44px; font-size: 22px; border-radius: 8px; }

.hero-meta {
  display: flex; justify-content: center; gap: 56px; flex-wrap: wrap;
  margin-top: 22px;
}
.meta-item { display: flex; flex-direction: column; gap: 2px; min-width: 120px; }
.meta-label { font-size: 12px; color: var(--btc-text-muted); }
.meta-item a, .meta-item span:not(.meta-label) { font-family: var(--btc-font-mono); font-size: 15px; color: var(--btc-text); font-weight: 600; }

/* 区块哈希：独立一行，两行等宽居中，不出现孤字换行 */
.hero-hash {
  margin: 18px auto 0; max-width: 560px;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.hero-hash code {
  font-family: var(--btc-font-mono);
  font-size: 13px; font-weight: 400;
  color: var(--btc-text-2);
  letter-spacing: 0.4px;
  line-height: 2;
  text-align: center;
}
.hash-half { display: block; white-space: pre; }
.hero-hash code b { color: var(--btc-orange-hover); font-weight: 700; }

.hero-derive { margin-top: 18px; font-size: 13px; color: var(--btc-text-muted); }
.hero-derive b { color: var(--btc-orange-hover); white-space: nowrap; }

/* ===== 区块标题 ===== */
section { margin-top: 44px; }
.section-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.section-head h2 { font-size: 20px; }
.section-sub { font-size: 13px; color: var(--btc-text-muted); }

/* ===== 开奖记录 ===== */
.grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.day-card { padding: 18px; transition: border-color 0.15s; }
.day-card:hover { border-color: var(--btc-border-strong); }
.day-card-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.day-date { font-weight: 700; font-size: 15px; }
.day-date small { font-weight: 400; color: var(--btc-text-muted); margin-left: 6px; font-size: 12px; }
.day-link { font-size: 12.5px; white-space: nowrap; }
.day-card .digits-sm { justify-content: flex-start; }
.day-card .digits-sm .digit {
  background: var(--btc-orange-faint); border-color: var(--btc-border-strong); color: var(--btc-text);
}
.day-meta {
  margin-top: 12px; font-size: 12px; color: var(--btc-text-2);
  display: flex; flex-direction: column; gap: 3px;
  font-family: var(--btc-font-mono);
}
.day-meta b { color: var(--btc-orange-hover); font-weight: 700; }
.day-hash { line-height: 1.9; letter-spacing: 0.3px; }
.day-hash b { color: var(--btc-orange-hover); }
.loading-card { color: var(--btc-text-muted); text-align: center; }

/* ===== 工具区 ===== */
.tools-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.tool-card h3 { font-size: 17px; margin-bottom: 4px; }
.tool-desc { font-size: 13px; color: var(--btc-text-2); margin-bottom: 14px; }

.tool-form { display: flex; gap: 10px; }
.tool-form-col { flex-direction: column; gap: 12px; }
.tool-form input[type="number"],
.tool-form input[type="datetime-local"] {
  flex: 1; width: 100%;
  border: 1px solid var(--btc-border);
  border-radius: var(--btc-radius-sm);
  padding: 10px 12px;
  font-size: 15px; font-family: var(--btc-font-mono);
  background: var(--btc-bg-deep); color: var(--btc-text);
  outline: none;
  transition: border-color 0.15s;
}
.tool-form input:focus { border-color: var(--btc-orange); box-shadow: 0 0 0 2px var(--btc-orange-faint); }
.field label { display: block; font-size: 13px; color: var(--btc-text-2); margin-bottom: 5px; }
.field-inline { display: flex; align-items: center; gap: 10px; }
.field-inline label { margin-bottom: 0; white-space: nowrap; }
.interval-box { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--btc-text-2); }
.interval-box input { width: 90px; }
.field-inline .interval-box input { width: 90px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; border-radius: var(--btc-radius-sm);
  padding: 10px 20px; font-size: 14.5px; font-weight: 600;
  cursor: pointer; transition: background 0.2s, transform 0.05s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--btc-orange); color: #fff; }
.btn-primary:hover { background: var(--btc-orange-hover); }
.btn-ghost {
  background: transparent; color: var(--btc-orange-hover);
  border: 1px solid var(--btc-border-strong);
}
.btn-ghost:hover { background: var(--btc-orange-faint); }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* tabs */
.tabbar {
  display: inline-flex; background: var(--btc-bg-deep);
  border: 1px solid var(--btc-border); border-radius: 10px;
  padding: 3px; margin-bottom: 14px; gap: 3px;
}
.tab {
  border: none; background: transparent; cursor: pointer;
  padding: 7px 14px; font-size: 13.5px; border-radius: 8px;
  color: var(--btc-text-2); transition: all 0.15s;
}
.tab.active { background: var(--btc-orange); color: #fff; font-weight: 600; }
.tab:not(.active):hover { color: var(--btc-orange-hover); }

/* 结果区 */
.result-area { margin-top: 16px; border-top: 1px dashed var(--btc-border); padding-top: 16px; }
.result-title { font-size: 13px; color: var(--btc-text-muted); margin-bottom: 8px; }
.result-digits { margin: 10px 0 14px; }
.result-rows { display: flex; flex-direction: column; gap: 6px; font-size: 13px; }
.result-rows .row { display: flex; gap: 8px; flex-wrap: wrap; align-items: baseline; }
.result-rows .k { color: var(--btc-text-muted); min-width: 72px; }
.result-rows .v { font-family: var(--btc-font-mono); color: var(--btc-text); word-break: break-all; }
.result-rows .v .hash-half { font-size: 12.5px; letter-spacing: 0.3px; line-height: 1.9; }
.result-rows .v b { color: var(--btc-orange-hover); }
.result-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.result-msg { font-size: 14px; color: var(--btc-text-2); }
.result-msg.err { color: #ff3b30; }
.result-msg .hl { color: var(--btc-orange-hover); font-weight: 700; }
.spin {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--btc-border-strong); border-top-color: var(--btc-orange);
  border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 规则 ===== */
.rules { padding: 28px; }
.rules h2 { font-size: 20px; margin-bottom: 14px; }
.rules ol { padding-left: 20px; display: flex; flex-direction: column; gap: 10px; font-size: 14.5px; color: var(--btc-text-2); }
.rules li b { color: var(--btc-text); }
.rules code {
  background: var(--btc-orange-faint); border-radius: 5px; padding: 1px 6px;
  font-size: 13px; color: var(--btc-orange-hover);
}
.rules-note { margin-top: 18px; font-size: 12.5px; color: var(--btc-text-muted); }


/* ===== 响应式 ===== */
@media (max-width: 920px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-inner { height: 54px; }
  .brand { font-size: 17px; gap: 7px; }
  .brand span { white-space: nowrap; }
  .nav-links { gap: 12px; font-size: 13px; }
  .nav-links a { white-space: nowrap; }
  .nav-links a:nth-child(1), .nav-links a:nth-child(4) { display: none; }
  .grid { grid-template-columns: 1fr; }
  .digits { gap: 8px; }
  .digits-lg .digit { width: 44px; height: 60px; font-size: 28px; }
  .hero { padding: 28px 12px 24px; }
  .hero-meta { gap: 18px; }
  .hero-hash code { font-size: 12px; }
  .result-rows .v .hash-half { font-size: 11.5px; }
}