/* Titan Portal — 系统门户 */
:root {
  --bg: #080c14; --bg2: #101624; --bg3: #181f30; --border: #232d42;
  --text: #d8dce6; --text2: #6b7a90; --accent: #5c9eff;
  --purple: #a78bfa; --pink: #ff6b9d; --cyan: #38bdf8; --orange: #f0a040;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Mono", "Menlo", monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 20% 0%, rgba(92,158,255,0.06) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 100%, rgba(167,139,250,0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 600px;
  padding: 40px 24px;
}

/* 头部 */
.header {
  text-align: center;
  margin-bottom: 48px;
}

.logo {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--accent), var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
}

.welcome {
  font-size: 16px;
  color: var(--text2);
  letter-spacing: 1px;
}

.welcome strong {
  color: var(--text);
}

/* 系统卡片 */
.systems {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
  color: var(--text);
}

.card:hover {
  border-color: var(--accent);
  background: var(--bg3);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(92,158,255,0.1);
}

.card-icon {
  font-size: 40px;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg3);
  border-radius: 14px;
  flex-shrink: 0;
}

.card-info {
  flex: 1;
}

.card-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.card-desc {
  font-size: 13px;
  color: var(--text2);
}

.card-arrow {
  font-size: 20px;
  color: var(--text2);
  transition: transform 0.25s;
}

.card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* 退出按钮 */
.actions {
  display: flex;
  justify-content: center;
}

.btn-logout {
  padding: 10px 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text2);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-logout:hover {
  border-color: var(--pink);
  color: var(--pink);
  background: rgba(255,107,157,0.06);
}

/* 状态 */
.loading {
  text-align: center;
  color: var(--text2);
  padding: 60px 0;
  font-size: 15px;
}

.error-msg {
  text-align: center;
  color: #ff5555;
  padding: 20px;
  font-size: 14px;
}