/* =====================================================
   DeepKnow 登录页 — 白底两栏，Evose 参考风格
   ===================================================== */

:root {
  --brand: #1AAD7C;
  --brand-d: #159669;
  --brand-l: #E6F5EF;
  --brand-atmo: #F2FAF6;
  --s0:  #FFFFFF;
  --s50: #F7F8FA;
  --s100: #F0F2F5;
  --s200: #E4E7EC;
  --s300: #CED2D9;
  --s400: #9CA3AF;
  --s500: #6B7280;
  --s700: #374151;
  --s900: #0F172A;
  --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: var(--font);
  color: var(--s900);
  background: var(--s0);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(360px, 1fr);
  min-height: 100vh;
}

/* ============================================
   左侧
   ============================================ */
.login-left {
  position: relative;
  background: linear-gradient(180deg, var(--brand-atmo) 0%, #FFFFFF 65%);
  padding: 40px 56px 44px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  z-index: 3;
}
.login-brand-logo {
  width: 32px; height: 32px;
  border-radius: 7px;
}
.login-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--s900);
  letter-spacing: -0.01em;
}

/* ============================================
   左侧主标题
   ============================================ */
.login-hero {
  flex-shrink: 0;
  padding: 40px 0 28px;
  position: relative;
  z-index: 3;
}
.login-hero-title {
  font-size: 42px;
  font-weight: 700;
  color: var(--s900);
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.login-hero-desc {
  font-size: 14px;
  color: var(--s500);
  margin: 16px 0 0;
  line-height: 1.7;
  max-width: 540px;
}
.login-hero-foot {
  font-size: 12px;
  color: var(--s400);
  font-family: 'JetBrains Mono', monospace;
  padding: 24px 0 0;
  margin-top: auto;
  border-top: 1px solid var(--s100);
}

/* ============================================
   左侧功能分块 (2x3 grid)
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 16px;
  flex: 1;
  align-content: start;
  padding-bottom: 20px;
}

.feature-block {
  display: flex;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(230, 245, 239, 0.9);
  border-radius: 12px;
  transition: background-color 200ms, border-color 200ms, transform 200ms cubic-bezier(0.16, 1, 0.3, 1);
}
.feature-block:hover {
  background: #FFFFFF;
  border-color: var(--brand-l);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -12px rgba(26, 173, 124, 0.18);
}

.feature-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.feature-body {
  min-width: 0;
  flex: 1;
}

.feature-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--s900);
  line-height: 1.4;
  margin-bottom: 4px;
}

.feature-desc {
  font-size: 12px;
  color: var(--s500);
  line-height: 1.6;
  margin-bottom: 10px;
}

.feature-desc code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  background: var(--s50);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--brand-d);
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.feature-tag {
  font-size: 10px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--brand-l);
  color: var(--brand-d);
  letter-spacing: 0.02em;
}

/* ============================================
   右侧登录
   ============================================ */
.login-right {
  background: #FFFFFF;
  border-left: 1px solid var(--s100);
  display: grid;
  place-items: center;
  padding: 40px 32px;
}

.login-form-wrap {
  width: 100%;
  max-width: 360px;
}

.login-wave {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.login-wave-emoji {
  font-size: 26px;
  animation: wave 1.6s ease-in-out infinite;
  transform-origin: 70% 70%;
  display: inline-block;
}
@keyframes wave {
  0%, 60%, 100% { transform: rotate(0); }
  15% { transform: rotate(14deg); }
  30% { transform: rotate(-8deg); }
  45% { transform: rotate(14deg); }
}
.login-form-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--s900);
  margin: 0;
  letter-spacing: -0.01em;
}
.login-form-sub {
  font-size: 13px;
  color: var(--s500);
  margin: 8px 0 32px;
  line-height: 1.6;
}

/* 飞书按钮 */
.feishu-btn {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #FFFFFF;
  border: 1.5px solid var(--s200);
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--s900);
  transition: border-color 150ms, background-color 150ms, transform 120ms;
}
.feishu-btn:hover {
  border-color: #3370FF;
  background: #F5F9FF;
}
.feishu-btn:active { transform: scale(0.98); }
.feishu-btn.is-loading {
  pointer-events: none;
  color: var(--s500);
  border-color: var(--s200);
  background: var(--s50);
}
.feishu-btn-icon { display: inline-flex; }

.feishu-btn-spin {
  width: 16px; height: 16px;
  border: 2px solid var(--s300);
  border-top-color: var(--brand);
  border-radius: 999px;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.login-terms {
  font-size: 11px;
  color: var(--s400);
  margin: 16px 0 0;
  text-align: center;
  line-height: 1.6;
}
.login-terms a {
  color: var(--s700);
  text-decoration: none;
  border-bottom: 1px dashed var(--s300);
}
.login-terms a:hover { color: var(--brand-d); border-color: var(--brand); }

/* ============================================
   响应式：小屏隐藏左侧可视化，只保留右侧登录
   ============================================ */
@media (max-width: 900px) {
  .login-shell {
    grid-template-columns: 1fr;
  }
  .login-left {
    display: none;
  }
  .login-right {
    border-left: none;
    padding: 40px 24px;
    min-height: 100vh;
  }
  .login-form-wrap { max-width: 100%; }
}

/* 中屏调整 */
@media (max-width: 1280px) {
  .login-left { padding: 32px 32px 40px; }
  .login-hero-title { font-size: 34px; }
  .feature-block { padding: 14px 14px; }
  .feature-icon-wrap { width: 36px; height: 36px; }
  .feature-title { font-size: 13px; }
  .feature-desc { font-size: 11px; }
}

/* 窄一点的中屏：feature 单列 */
@media (max-width: 1100px) and (min-width: 901px) {
  .feature-grid { grid-template-columns: 1fr; }
  .login-hero-title { font-size: 30px; }
}