/* ─── 军工物资管理系统 · 登录页 ─────────────────────────── */
:root {
  --login-bg: #080c18;
  --login-card-bg: rgba(14, 22, 48, 0.94);
  --login-border: rgba(40, 78, 148, 0.4);
  --login-accent: #3b8cff;
  --login-accent-cyan: #00d4c8;
  --login-text: #c5d4eb;
  --login-text-dim: #6880aa;
  --login-text-bright: #eef3ff;
  --login-error: #e64545;
  --login-radius: 8px;
  --login-font: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
}

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

body.login-page {
  background: var(--login-bg);
  font-family: var(--login-font);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-image:
    radial-gradient(ellipse at 50% 30%, rgba(20, 58, 128, 0.22) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 70%, rgba(12, 96, 96, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(40, 30, 80, 0.10) 0%, transparent 55%);
}

/* ─── 粒子背景 ────────────────────────────────────── */
.login-bg {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
}

/* ─── 登录卡片 ───────────────────────────────────── */
.login-wrap {
  position: relative;
  z-index: 1;
  width: 420px;
  max-width: 92vw;
}

.login-card {
  background: var(--login-card-bg);
  border: 1px solid var(--login-border);
  border-radius: 14px;
  padding: 42px 40px 36px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45), 0 0 60px rgba(59, 140, 255, 0.06);
}

/* ─── 标题区 ────────────────────────────────────── */
.login-header {
  text-align: center;
  margin-bottom: 36px;
}
.login-logo {
  width: 52px; height: 52px;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, var(--login-accent), var(--login-accent-cyan));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  box-shadow: 0 0 28px rgba(59, 140, 255, 0.35);
}
.login-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--login-text-bright);
  letter-spacing: 0.05em;
}
.login-sub {
  font-size: 12px;
  color: var(--login-text-dim);
  margin-top: 6px;
  letter-spacing: 0.06em;
}

/* ─── 表单 ──────────────────────────────────────── */
.login-field {
  margin-bottom: 20px;
}
.login-field label {
  display: block;
  font-size: 12px;
  color: var(--login-text-dim);
  margin-bottom: 7px;
  letter-spacing: 0.04em;
}
.login-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.login-input-wrap .input-icon {
  position: absolute;
  left: 14px;
  color: var(--login-text-dim);
  pointer-events: none;
  font-size: 16px;
}
.login-input-wrap input {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background: rgba(10, 18, 38, 0.7);
  border: 1px solid var(--login-border);
  border-radius: var(--login-radius);
  color: var(--login-text-bright);
  font-size: 14px;
  font-family: var(--login-font);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.login-input-wrap input::placeholder {
  color: rgba(104, 128, 170, 0.5);
}
.login-input-wrap input:focus {
  border-color: var(--login-accent);
  box-shadow: 0 0 0 3px rgba(59, 140, 255, 0.12);
}

/* ─── 错误提示 ──────────────────────────────────── */
.login-error {
  background: rgba(230, 69, 69, 0.1);
  border: 1px solid rgba(230, 69, 69, 0.3);
  border-radius: var(--login-radius);
  padding: 10px 14px;
  color: var(--login-error);
  font-size: 13px;
  text-align: center;
  margin-bottom: 18px;
  display: none;
  animation: shake 0.4s ease;
}
.login-error.show { display: block; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}

/* ─── 登录按钮 ──────────────────────────────────── */
.login-btn {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--login-accent), #2563d8);
  border: none;
  border-radius: var(--login-radius);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--login-font);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: opacity 0.2s, box-shadow 0.2s, transform 0.1s;
  margin-top: 4px;
}
.login-btn:hover {
  opacity: 0.92;
  box-shadow: 0 0 22px rgba(59, 140, 255, 0.3);
}
.login-btn:active {
  transform: scale(0.98);
}
.login-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ─── 提示文字 ──────────────────────────────────── */
.login-hint {
  text-align: center;
  margin-top: 16px;
  font-size: 11px;
  color: var(--login-text-dim);
  letter-spacing: 0.03em;
}

/* ─── 粒子动画 ──────────────────────────────────── */
@keyframes floatUp {
  0% { transform: translateY(0) scale(1); opacity: 0.6; }
  100% { transform: translateY(-120px) scale(0.3); opacity: 0; }
}
.particle {
  position: absolute;
  width: 2px; height: 2px;
  background: var(--login-accent);
  border-radius: 50%;
  animation: floatUp 3s linear infinite;
  pointer-events: none;
}