:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --card-bg-hover: #27354f;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --danger: #ef4444;
  --success: #22c55e;
  --border: #334155;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.page {
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

/* 登录页（浮层） */
#login-page {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(circle at 30% 30%, #1e293b 0%, #0f172a 80%);
}

#login-page.hidden {
  display: none;
}

.login-box {
  width: 100%;
  max-width: 420px;
  padding: 40px;
  background: var(--card-bg);
  border-radius: 20px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  text-align: center;
  border: 1px solid var(--border);
}

.wolf-icon {
  font-size: 72px;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 20px rgba(56, 189, 248, 0.4));
}

.login-box h1 {
  font-size: 28px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* 表单元素 */
.input-group {
  margin-bottom: 20px;
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group input:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
  color: #475569;
}

.input-group input[type="file"] {
  padding: 10px;
  cursor: pointer;
}

.hint {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: #64748b;
}

/* 按钮 */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px -5px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  background: var(--border);
  color: var(--text-primary);
  padding: 8px 16px;
  font-size: 14px;
}

.btn-secondary:hover {
  background: #475569;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  padding: 6px 12px;
  font-size: 13px;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn-download {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
  padding: 8px 16px;
  font-size: 14px;
  text-decoration: none;
  display: inline-block;
}

.btn-download:hover {
  background: rgba(56, 189, 248, 0.25);
}

/* 提示信息 */
.error-msg,
.status-msg {
  margin-top: 12px;
  font-size: 14px;
  min-height: 20px;
}

.error-msg {
  color: var(--danger);
}

.status-msg.success {
  color: var(--success);
}

.status-msg.error {
  color: var(--danger);
}

/* 主页面 */
#main-page {
  display: flex;
  flex-direction: column;
}

#main-page.hidden {
  display: none;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wolf-icon-small {
  font-size: 32px;
}

.header-left h1 {
  font-size: 20px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

#user-info {
  color: var(--text-secondary);
  font-size: 14px;
}

.main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 32px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 32px;
}

.upload-section h2,
.list-section h2 {
  margin-bottom: 20px;
  font-size: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

.software-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.software-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: transform 0.2s, background 0.2s;
}

.software-card:hover {
  background: var(--card-bg-hover);
  transform: translateY(-2px);
}

.software-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.software-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-version {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
}

.badge-size {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-secondary);
}

.software-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.5;
  min-height: 42px;
}

.software-date {
  color: #64748b;
  font-size: 12px;
  margin-bottom: 16px;
}

.software-actions {
  display: flex;
  gap: 10px;
}

.empty-tip {
  text-align: center;
  color: var(--text-secondary);
  padding: 60px 20px;
  font-size: 16px;
}

.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-secondary);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

/* 响应式 */
@media (max-width: 768px) {
  .header {
    padding: 12px 16px;
  }
  
  .header-left h1 {
    font-size: 16px;
  }
  
  .main {
    padding: 20px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .software-grid {
    grid-template-columns: 1fr;
  }
}