/* NexusFlow — 下一代个人可视化工作流引擎
   风格：未来科技感、深色、极简、高级、动态流程可视化 */

:root {
  --nf-bg-deep: #08090c;
  --nf-bg-card: #0e1014;
  --nf-bg-elevated: #14171d;
  --nf-bg-glass: rgba(20, 23, 29, 0.75);
  --nf-text-primary: #e6e8ec;
  --nf-text-secondary: #9ba0ab;
  --nf-text-muted: #5c616b;
  --nf-accent: #22d3ee;
  --nf-accent-dim: #0891b2;
  --nf-accent-glow: rgba(34, 211, 238, 0.2);
  --nf-border: rgba(255, 255, 255, 0.06);
  --nf-radius: 14px;
  --nf-radius-sm: 10px;
  --nf-font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --nf-font-mono: 'JetBrains Mono', monospace;
  /* 步骤状态色 */
  --nf-status-pending: #6b7280;
  --nf-status-running: #3b82f6;
  --nf-status-confirm: #eab308;
  --nf-status-done: #22c55e;
  --nf-status-stuck: #ef4444;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--nf-font-sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.55;
  color: var(--nf-text-primary);
  background: var(--nf-bg-deep);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ----- 应用布局 ----- */
.hidden {
  display: none !important;
}

.nf-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ----- 顶部栏 ----- */
.nf-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: var(--nf-bg-glass);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--nf-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nf-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--nf-text-primary);
  text-decoration: none;
}

.nf-logo-icon {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--nf-accent-dim), var(--nf-accent));
  border-radius: 6px;
  box-shadow: 0 0 16px var(--nf-accent-glow);
}

.nf-tagline {
  flex: 1;
  margin: 0;
  font-size: 0.85rem;
  color: var(--nf-text-muted);
  font-weight: 400;
}

.nf-header-actions {
  display: flex;
  gap: 0.75rem;
}

/* ----- 按钮 ----- */
.nf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-family: var(--nf-font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--nf-radius-sm);
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, color 0.2s;
}

.nf-btn:active {
  transform: scale(0.98);
}

.nf-btn-primary {
  background: linear-gradient(135deg, var(--nf-accent-dim), var(--nf-accent));
  color: var(--nf-bg-deep);
  box-shadow: 0 0 20px var(--nf-accent-glow);
}

.nf-btn-primary:hover {
  box-shadow: 0 0 28px var(--nf-accent-glow);
}

.nf-btn-ghost {
  background: transparent;
  color: var(--nf-text-secondary);
  border: 1px solid var(--nf-border);
}

.nf-btn-ghost:hover {
  color: var(--nf-text-primary);
  border-color: var(--nf-text-muted);
  background: rgba(255, 255, 255, 0.03);
}

.nf-btn-success:hover { color: var(--nf-status-done); border-color: var(--nf-status-done); }
.nf-btn-danger:hover { color: var(--nf-status-stuck); border-color: var(--nf-status-stuck); }

/* ----- 主内容 ----- */
.nf-main {
  flex: 1;
  display: flex;
  min-height: calc(100vh - 56px);
  position: relative;
}

/* ----- 侧边栏 ----- */
.nf-sidebar {
  width: 260px;
  min-width: 260px;
  padding: 1.25rem;
  background: var(--nf-bg-card);
  border-right: 1px solid var(--nf-border);
  display: flex;
  flex-direction: column;
}

.nf-login-banner {
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: var(--nf-bg-elevated);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-sm);
  font-size: 0.85rem;
  color: var(--nf-text-secondary);
  line-height: 1.5;
}
.nf-login-banner a {
  color: var(--nf-accent);
  text-decoration: none;
}
.nf-login-banner a:hover {
  text-decoration: underline;
}

.nf-sidebar-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--nf-text-muted);
  margin: 0 0 1rem;
}

.nf-flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  overflow-y: auto;
}

.nf-flow-list li {
  margin-bottom: 0.35rem;
}

.nf-flow-item {
  display: block;
  width: 100%;
  padding: 0.65rem 0.85rem;
  text-align: left;
  font-family: var(--nf-font-sans);
  font-size: 0.9rem;
  color: var(--nf-text-secondary);
  background: transparent;
  border: none;
  border-radius: var(--nf-radius-sm);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.nf-flow-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--nf-text-primary);
}

.nf-flow-item.active {
  background: rgba(34, 211, 238, 0.12);
  color: var(--nf-accent);
  border: 1px solid rgba(34, 211, 238, 0.25);
}

.nf-flow-item-name {
  font-weight: 500;
  display: block;
}

.nf-flow-item-progress {
  font-size: 0.75rem;
  color: var(--nf-text-muted);
  margin-top: 0.2rem;
}

.nf-sidebar-footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--nf-border);
}

.nf-one-liner {
  font-size: 0.8rem;
  color: var(--nf-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ----- 画布区域 ----- */
.nf-canvas-wrap {
  flex: 1;
  position: relative;
  overflow: auto;
  padding: 1.5rem;
}

.nf-canvas-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.nf-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.nf-glow-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--nf-accent-glow) 0%, transparent 70%);
  top: -100px;
  left: 20%;
}

.nf-glow-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(8, 145, 178, 0.15) 0%, transparent 70%);
  bottom: 10%;
  right: 15%;
}

.nf-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}

.nf-canvas {
  position: relative;
  min-height: 400px;
  max-width: 1000px;
  margin: 0 auto;
}

/* ----- 流程元信息 ----- */
.nf-flow-meta {
  margin-bottom: 2rem;
}

.nf-flow-name {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
  background: linear-gradient(180deg, #fff 0%, var(--nf-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nf-flow-desc {
  font-size: 0.95rem;
  color: var(--nf-text-muted);
  margin: 0 0 1rem;
}

.nf-flow-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nf-progress-bar {
  flex: 1;
  max-width: 240px;
  height: 6px;
  background: var(--nf-bg-elevated);
  border-radius: 3px;
  overflow: hidden;
}

.nf-progress-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--nf-accent-dim), var(--nf-accent));
  border-radius: 3px;
  width: 0%;
  transition: width 0.5s ease;
}

.nf-progress-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--nf-accent);
  font-family: var(--nf-font-mono);
}

.nf-flow-dates {
  font-size: 0.8rem;
  color: var(--nf-text-muted);
  margin-top: 0.5rem;
}

.nf-add-step {
  margin-top: 0.75rem;
}

/* ----- 步骤容器（圆点+连线）----- */
.nf-steps-container {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 0;
  min-height: 120px;
}

.nf-step-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  position: relative;
  min-height: 88px;
}

.nf-step-node {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--nf-bg-deep);
  position: relative;
  z-index: 2;
  transition: box-shadow 0.3s, transform 0.2s;
}

.nf-step-node:hover {
  transform: scale(1.05);
}

.nf-step-node.status-pending {
  background: var(--nf-status-pending);
  box-shadow: 0 0 0 2px rgba(107, 114, 128, 0.3);
}

.nf-step-node.status-running {
  background: var(--nf-status-running);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
  animation: nf-pulse 1.5s ease-in-out infinite;
}

.nf-step-node.status-confirm {
  background: var(--nf-status-confirm);
  box-shadow: 0 0 20px rgba(234, 179, 8, 0.35);
}

.nf-step-node.status-done {
  background: var(--nf-status-done);
  box-shadow: 0 0 16px rgba(34, 197, 94, 0.3);
}

.nf-step-node.status-stuck {
  background: var(--nf-status-stuck);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.35);
}

@keyframes nf-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.nf-step-card {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 1.1rem;
  background: var(--nf-bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.nf-step-card:hover {
  border-color: rgba(34, 211, 238, 0.2);
  box-shadow: 0 0 24px rgba(0, 0, 0, 0.2);
}

.nf-step-card-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0 0 0.25rem;
  color: var(--nf-text-primary);
}

.nf-step-card-desc {
  font-size: 0.8rem;
  color: var(--nf-text-muted);
  margin: 0;
}

.nf-step-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.nf-step-badge {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.nf-step-badge.pending { background: rgba(107, 114, 128, 0.3); color: #9ca3af; }
.nf-step-badge.running { background: rgba(59, 130, 246, 0.25); color: #93c5fd; }
.nf-step-badge.confirm { background: rgba(234, 179, 8, 0.25); color: #fde047; }
.nf-step-badge.done { background: rgba(34, 197, 94, 0.25); color: #86efac; }
.nf-step-badge.stuck { background: rgba(239, 68, 68, 0.25); color: #fca5a5; }

/* 连接线 SVG */
.nf-lines-svg {
  position: absolute;
  left: 0;
  width: 44px;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}

.nf-line {
  fill: none;
  stroke: url(#lineGrad);
  stroke-width: 2;
  stroke-dasharray: 8 6;
  animation: nf-line-flow 0.8s linear infinite;
  opacity: 0.8;
}

.nf-line.inactive {
  stroke: var(--nf-border);
  stroke-dasharray: none;
  animation: none;
  opacity: 0.5;
}

@keyframes nf-line-flow {
  to { stroke-dashoffset: -14; }
}

/* ----- 空状态 ----- */
.nf-empty {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  padding: 2rem;
  pointer-events: none;
}

.nf-empty.hidden {
  display: none;
}

.nf-empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--nf-accent-dim), var(--nf-accent));
  border-radius: 16px;
  opacity: 0.6;
  box-shadow: 0 0 40px var(--nf-accent-glow);
}

.nf-empty h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--nf-text-secondary);
  margin: 0 0 0.5rem;
}

.nf-empty p {
  font-size: 0.9rem;
  color: var(--nf-text-muted);
  margin: 0;
}

/* ----- 步骤详情抽屉 ----- */
.nf-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
  z-index: 100;
}

.nf-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.nf-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 380px;
  height: 100%;
  background: var(--nf-bg-card);
  border-left: 1px solid var(--nf-border);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 101;
  display: flex;
  flex-direction: column;
}

.nf-drawer.open {
  transform: translateX(0);
}

.nf-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--nf-border);
}

.nf-drawer-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.nf-drawer-close {
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--nf-text-muted);
  cursor: pointer;
  border-radius: var(--nf-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.nf-drawer-close:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--nf-text-primary);
}

.nf-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
}

.nf-drawer-status {
  margin-bottom: 1rem;
}

.nf-drawer-desc {
  font-size: 0.9rem;
  color: var(--nf-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.nf-drawer-log h3,
.nf-drawer-branches h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--nf-text-muted);
  margin: 0 0 0.5rem;
}

.nf-drawer-log pre {
  font-family: var(--nf-font-mono);
  font-size: 0.8rem;
  background: var(--nf-bg-deep);
  padding: 0.75rem;
  border-radius: var(--nf-radius-sm);
  border: 1px solid var(--nf-border);
  color: var(--nf-text-secondary);
  margin: 0 0 1.25rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.nf-drawer-branches ul {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.nf-drawer-branches li {
  font-size: 0.85rem;
  color: var(--nf-text-secondary);
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--nf-border);
}

.nf-drawer-branches li:last-child {
  border-bottom: none;
}

.nf-drawer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nf-drawer-actions .nf-btn {
  flex: 1;
  min-width: 100px;
}

/* ----- 新建流程弹窗 ----- */
.nf-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
  z-index: 200;
}

.nf-modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.nf-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 90%;
  max-width: 420px;
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s, transform 0.25s;
  z-index: 201;
}

.nf-modal.open {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.nf-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--nf-border);
}

.nf-modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.nf-modal-close {
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--nf-text-muted);
  cursor: pointer;
  border-radius: var(--nf-radius-sm);
  font-size: 1.25rem;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.nf-modal-close:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--nf-text-primary);
}

.nf-modal-body {
  padding: 1.25rem;
}

.nf-ai-hint {
  font-size: 0.8rem;
  color: var(--nf-text-muted);
  margin: 0 0 0 0;
  margin-top: 0.5rem;
}

.nf-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--nf-text-muted);
  margin-bottom: 0.35rem;
}

.nf-input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--nf-font-sans);
  font-size: 0.95rem;
  color: var(--nf-text-primary);
  background: var(--nf-bg-deep);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-sm);
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}

.nf-input::placeholder {
  color: var(--nf-text-muted);
}

.nf-input:focus {
  outline: none;
  border-color: var(--nf-accent);
  box-shadow: 0 0 0 3px var(--nf-accent-glow);
}

.nf-textarea {
  min-height: 80px;
  resize: vertical;
}

.nf-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--nf-border);
}

/* ----- 响应式 ----- */
@media (max-width: 768px) {
  .nf-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .nf-tagline {
    order: 3;
    width: 100%;
  }

  .nf-sidebar {
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--nf-border);
    max-height: 200px;
  }

  .nf-main {
    flex-direction: column;
  }

  .nf-flow-item-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nf-drawer {
    max-width: 100%;
  }
}