/* ═══════════════════════════════════════════
   星空科技 · 星际皮肤 v1.0
   Stellar Tech Sci-Fi Interface Skin
   ═══════════════════════════════════════════ */

:root {
  /* ── 核心调色板 ── */
  --sf-bg-deep: #060b14;
  --sf-bg-panel: rgba(8, 16, 32, 0.82);
  --sf-bg-card: rgba(10, 20, 42, 0.7);
  --sf-bg-hover: rgba(16, 28, 56, 0.85);
  
  /* ── 霓虹色系 ── */
  --sf-neon-cyan: #4fd1ff;
  --sf-neon-blue: #3b82f6;
  --sf-neon-purple: #a855f7;
  --sf-neon-pink: #f472b6;
  --sf-neon-green: #34d399;
  --sf-neon-gold: #fbbf24;
  
  /* ── 发光 ── */
  --sf-glow-cyan: 0 0 15px rgba(79,209,255,.35), 0 0 3px rgba(79,209,255,.15);
  --sf-glow-purple: 0 0 15px rgba(168,85,247,.35), 0 0 3px rgba(168,85,247,.15);
  --sf-glow-green: 0 0 15px rgba(52,211,153,.35), 0 0 3px rgba(52,211,153,.15);
  
  /* ── 边框 ── */
  --sf-border: 1px solid rgba(79,209,255,.1);
  --sf-border-active: 1px solid rgba(79,209,255,.35);
  --sf-radius: 12px;
  --sf-radius-lg: 18px;
  
  /* ── 字体 ── */
  --sf-font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --sf-font-display: 'SF Pro Display', -apple-system, 'PingFang SC', sans-serif;
  
  /* ── 过渡 ── */
  --sf-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ═══════════════════════════════════════════
   Canvas 粒子背景
   ═══════════════════════════════════════════ */
#sf-starfield {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* ═══════════════════════════════════════════
   扫描线叠加
   ═══════════════════════════════════════════ */
.sf-scanlines::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(79,209,255,.015) 2px,
    rgba(79,209,255,.015) 4px
  );
  pointer-events: none;
  z-index: 1;
}

/* ═══════════════════════════════════════════
   卡片 - 玻璃拟态
   ═══════════════════════════════════════════ */
.sf-card {
  background: var(--sf-bg-card);
  border: var(--sf-border);
  border-radius: var(--sf-radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  transition: all var(--sf-transition);
  z-index: 2;
}

.sf-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(79,209,255,.4), 
    rgba(168,85,247,.4), 
    transparent
  );
  opacity: 0;
  transition: opacity var(--sf-transition);
}

.sf-card:hover {
  border-color: rgba(79,209,255,.25);
  box-shadow: var(--sf-glow-cyan);
  transform: translateY(-1px);
}

.sf-card:hover::before {
  opacity: 1;
}

/* ── 卡片霓虹变体 ── */
.sf-card-glow-cyan { border-color: rgba(79,209,255,.2); }
.sf-card-glow-purple { border-color: rgba(168,85,247,.2); }
.sf-card-glow-green { border-color: rgba(52,211,153,.2); }

.sf-card-glow-cyan:hover { box-shadow: var(--sf-glow-cyan); }
.sf-card-glow-purple:hover { box-shadow: var(--sf-glow-purple); }
.sf-card-glow-green:hover { box-shadow: var(--sf-glow-green); }

/* ═══════════════════════════════════════════
   按钮 - 全息风格
   ═══════════════════════════════════════════ */
.sf-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(79,209,255,.06);
  border: 1px solid rgba(79,209,255,.15);
  border-radius: 20px;
  color: var(--sf-neon-cyan);
  font-family: var(--sf-font-display);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--sf-transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  z-index: 2;
}

.sf-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(79,209,255,.1), 
    rgba(168,85,247,.1)
  );
  opacity: 0;
  transition: opacity var(--sf-transition);
}

.sf-btn:hover {
  border-color: rgba(79,209,255,.4);
  box-shadow: var(--sf-glow-cyan);
  color: #fff;
}

.sf-btn:hover::after {
  opacity: 1;
}

.sf-btn-primary {
  background: linear-gradient(135deg, rgba(79,209,255,.2), rgba(59,130,246,.2));
  border-color: rgba(79,209,255,.35);
}

/* ═══════════════════════════════════════════
   输入框 - 终端风格
   ═══════════════════════════════════════════ */
.sf-input {
  background: rgba(5, 10, 20, 0.6);
  border: 1px solid rgba(79,209,255,.12);
  border-radius: 10px;
  padding: 10px 16px;
  color: #e0f0ff;
  font-family: var(--sf-font-mono);
  font-size: 14px;
  outline: none;
  transition: all var(--sf-transition);
  width: 100%;
}

.sf-input:focus {
  border-color: var(--sf-neon-cyan);
  box-shadow: 0 0 20px rgba(79,209,255,.15), inset 0 0 20px rgba(79,209,255,.03);
}

.sf-input::placeholder {
  color: rgba(79,209,255,.3);
}

/* ═══════════════════════════════════════════
   标题 - HUD风格
   ═══════════════════════════════════════════ */
.sf-title {
  font-family: var(--sf-font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sf-title-glitch {
  position: relative;
  text-shadow: 0 0 20px rgba(79,209,255,.5);
}

/* ═══════════════════════════════════════════
   网格背景面板
   ═══════════════════════════════════════════ */
.sf-grid-bg {
  background-image: 
    linear-gradient(rgba(79,209,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,209,255,.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ═══════════════════════════════════════════
   数据标签 - 全息
   ═══════════════════════════════════════════ */
.sf-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: rgba(79,209,255,.08);
  border: 1px solid rgba(79,209,255,.15);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--sf-neon-cyan);
  font-family: var(--sf-font-mono);
}

/* ═══════════════════════════════════════════
   分隔线
   ═══════════════════════════════════════════ */
.sf-divider {
  height: 1px;
  background: linear-gradient(90deg, 
    transparent,
    rgba(79,209,255,.15),
    rgba(168,85,247,.15),
    transparent
  );
  margin: 16px 0;
}

/* ═══════════════════════════════════════════
   加载动画
   ═══════════════════════════════════════════ */
@keyframes sf-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes sf-scan {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(400%); }
}

@keyframes sf-flicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.8; }
  94% { opacity: 1; }
  96% { opacity: 0.9; }
  97% { opacity: 1; }
}

@keyframes sf-border-glow {
  0%, 100% { border-color: rgba(79,209,255,.15); }
  50% { border-color: rgba(79,209,255,.4); }
}

@keyframes sf-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

@keyframes sf-rotate-glow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════
   工具卡片网格
   ═══════════════════════════════════════════ */
.sf-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  position: relative;
  z-index: 2;
}

.sf-tool-card {
  background: var(--sf-bg-card);
  border: 1px solid rgba(79,209,255,.08);
  border-radius: var(--sf-radius-lg);
  padding: 24px;
  cursor: pointer;
  transition: all var(--sf-transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-decoration: none;
  color: inherit;
  display: block;
}

.sf-tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(79,209,255,.03), 
    transparent
  );
  transition: left 0.6s ease;
}

.sf-tool-card:hover::before {
  left: 100%;
}

.sf-tool-card:hover {
  border-color: rgba(79,209,255,.3);
  box-shadow: 0 0 30px rgba(79,209,255,.08), 0 8px 32px rgba(0,0,0,.4);
  transform: translateY(-2px);
}

.sf-tool-card .sf-tool-icon {
  font-size: 36px;
  margin-bottom: 12px;
  display: block;
  filter: drop-shadow(0 0 8px rgba(79,209,255,.3));
}

.sf-tool-card .sf-tool-name {
  font-family: var(--sf-font-display);
  font-size: 16px;
  font-weight: 700;
  color: #e0f0ff;
  margin-bottom: 6px;
}

.sf-tool-card .sf-tool-desc {
  font-size: 12px;
  color: #6a8aaa;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════
   角标装饰
   ═══════════════════════════════════════════ */
.sf-corner {
  position: absolute;
  width: 24px; height: 24px;
  border-color: rgba(79,209,255,.3);
  border-style: solid;
  pointer-events: none;
  z-index: 3;
}

.sf-corner-tl { top: 8px; left: 8px; border-width: 2px 0 0 2px; }
.sf-corner-tr { top: 8px; right: 8px; border-width: 2px 2px 0 0; }
.sf-corner-bl { bottom: 8px; left: 8px; border-width: 0 0 2px 2px; }
.sf-corner-br { bottom: 8px; right: 8px; border-width: 0 2px 2px 0; }

/* ═══════════════════════════════════════════
   全息面板容器
   ═══════════════════════════════════════════ */
.sf-panel {
  background: var(--sf-bg-panel);
  border: 1px solid rgba(79,209,255,.1);
  border-radius: var(--sf-radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 28px;
  position: relative;
  z-index: 2;
}

.sf-panel::after {
  content: '';
  position: absolute;
  top: -1px; left: 20px; right: 20px;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(79,209,255,.5), 
    rgba(168,85,247,.5), 
    transparent
  );
}

/* ═══════════════════════════════════════════
   响应式
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .sf-tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
  }
  
  .sf-panel {
    padding: 18px;
  }
}

@media (max-width: 480px) {
  .sf-tools-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

/* ═══════════════════════════════════════════
   响应式 & 移动端优化 v2.0
   ═══════════════════════════════════════════ */

@media(max-width:768px){
  body{padding:80px 12px 24px!important}
  .container,.content,.card{max-width:100%!important;padding-left:8px!important;padding-right:8px!important}
  h1{font-size:22px!important}
  h2{font-size:17px!important}
  h3{font-size:14px!important}
  .row,.stat-row{flex-direction:column!important;gap:10px!important}
  .col{min-width:100%!important}
  .btn,.chip,button[class*=btn]{font-size:12px!important;padding:10px 16px!important;min-height:44px;min-width:44px}
  input,select,textarea{font-size:16px!important;padding:10px 14px!important}
  table,.act-table{font-size:11px!important}
  .act-table th,.act-table td{padding:6px 4px!important}
  .navbar .nav-inner{padding:0 12px!important;height:56px!important}
  .navbar .nav-tab{padding:8px 10px!important;font-size:10px!important}
  .logo{font-size:16px!important}
  .logo-en{font-size:13px!important}
  .menu{gap:12px!important}
  .menu a{font-size:11px!important}
  .hero h1{font-size:24px!important}
  .hero .icon{font-size:40px!important}
  .donate-qr-row{flex-direction:column!important;align-items:center!important}
  .chart-wrap.tall{min-height:350px!important}
  .chart-wrap{min-height:250px!important}
}

@media(max-width:480px){
  body{padding:70px 8px 20px!important}
  h1{font-size:19px!important}
  .card{border-radius:10px!important;padding:12px 10px!important}
  .navbar .nav-inner{padding:0 8px!important;height:48px!important}
  .navbar .nav-tab{padding:6px 8px!important;font-size:9px!important}
  .btn,.chip,button[class*=btn]{font-size:11px!important;padding:8px 12px!important}
  .chart-wrap.tall{min-height:280px!important}
  .chart-wrap{min-height:200px!important}
}

/* ═══════════════════════════════════════════
   Toast 消息提示
   ═══════════════════════════════════════════ */
.st-toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:9999;
  padding:10px 24px;border-radius:10px;font-size:14px;font-weight:600;
  background:rgba(22,27,34,.95);border:1px solid rgba(79,209,255,.2);
  color:#c0d0e0;box-shadow:0 8px 32px rgba(0,0,0,.5);
  opacity:0;transition:opacity .3s,transform .3s;
  pointer-events:none;white-space:nowrap}
.st-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.st-toast.success{border-color:rgba(76,175,80,.4);color:#4caf50}
.st-toast.error{border-color:rgba(244,67,54,.4);color:#f44336}

/* Loading spinner */
.st-spinner{width:36px;height:36px;border:3px solid rgba(79,209,255,.15);
  border-top-color:#4fd1ff;border-radius:50%;animation:st-spin .7s linear infinite}
@keyframes st-spin{to{transform:rotate(360deg)}}
.st-loading{display:none;position:fixed;inset:0;z-index:9998;
  background:rgba(0,0,0,.4);justify-content:center;align-items:center}
.st-loading.show{display:flex}