* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Segoe UI", sans-serif;
  color: #e8edf7;
  background: #060a12;
  min-height: 100vh;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 78% 55% at 50% 0%, black, transparent);
  pointer-events: none;
  z-index: 0;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(88px);
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
}

.g1 {
  width: 380px;
  height: 380px;
  background: #1d4ed8;
  top: -120px;
  right: -80px;
}

.g2 {
  width: 320px;
  height: 320px;
  background: #0d9488;
  left: -80px;
  bottom: 8%;
}

.header {
  background: linear-gradient(180deg, rgba(6, 10, 18, 0.94), rgba(6, 10, 18, 0.7));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #e8edf7;
  padding: 16px 28px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: #94a3b8;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: #e2e8f0;
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.25);
}

.nav-link.active {
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.14);
  border-color: rgba(56, 189, 248, 0.35);
}

#app {
  position: relative;
  z-index: 2;
  max-width: 1180px;
  margin: 28px auto;
  padding: 0 28px 36px;
}

#app.app-wide {
  max-width: none;
  width: 100%;
  margin: 20px auto 28px;
  padding: 0 clamp(12px, 2vw, 28px) 32px;
}

#app.app-wide .editor-card {
  padding: 18px clamp(16px, 2vw, 28px) 22px;
}

.header-inner-wide {
  max-width: none;
  width: 100%;
  padding: 0 clamp(12px, 2vw, 28px);
  margin: 0 auto;
  box-sizing: border-box;
}

.card {
  background: rgba(15, 23, 42, 0.62);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 18px;
  backdrop-filter: blur(14px);
  box-shadow: 0 24px 58px rgba(0, 0, 0, 0.34);
}

.home-title {
  margin: 4px 0 14px;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.home-title-section {
  margin-top: 0;
  font-size: 24px;
}

.tag {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  background: rgba(56, 189, 248, 0.12);
  color: #7dd3fc;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, 280px);
  gap: 16px;
  justify-content: start;
}

.tool-card {
  width: 280px;
  height: 176px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.55);
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
  box-sizing: border-box;
}

.tool-card-content {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.tool-card:hover {
  border-color: rgba(56, 189, 248, 0.42);
  background: rgba(56, 189, 248, 0.08);
  transform: translateY(-2px);
}

.tool-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: #e2e8f0;
}

.tool-card p {
  margin: 0 0 8px;
  color: #94a3b8;
  font-size: 13px;
  line-height: 1.45;
}

.tool-note {
  margin: 0;
  color: #64748b;
  font-size: 12px;
  line-height: 1.35;
}

.btn {
  display: inline-block;
  padding: 11px 18px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn.secondary {
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.22);
  color: #94a3b8;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 14px;
}

.metric {
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 14px;
  padding: 14px;
}

.metric .label {
  color: #94a3b8;
  font-size: 13px;
}

.metric .value {
  margin-top: 8px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h3 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #e2e8f0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(15, 23, 42, 0.42);
  border-radius: 14px;
  overflow: hidden;
}

th,
td {
  border: 1px solid rgba(148, 163, 184, 0.16);
  padding: 10px 12px;
  text-align: left;
  font-size: 14px;
  color: #cbd5e1;
}

th {
  background: rgba(15, 23, 42, 0.8);
  font-weight: 600;
  color: #94a3b8;
}

.hint {
  color: #94a3b8;
  font-size: 14px;
  line-height: 1.6;
}

.error {
  color: #fda4af;
  margin-top: 12px;
  font-size: 14px;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 14px;
}

.table-wrap::-webkit-scrollbar {
  height: 8px;
}

.table-wrap::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.5);
  border-radius: 999px;
}

input[type="file"] {
  display: block;
  width: fit-content;
  margin: 10px 0 14px;
  font-size: 14px;
  color: #cbd5e1;
}

@media (max-width: 900px) {
  .header {
    padding: 14px 20px;
  }

  #app {
    padding: 0 20px 26px;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .tool-grid {
    grid-template-columns: repeat(2, 280px);
  }
}

@media (max-width: 640px) {
  .tool-grid {
    grid-template-columns: 280px;
  }
}

/* Markdown editor */
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.editor-toolbar .seg {
  display: inline-flex;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  overflow: hidden;
}

.seg-btn {
  padding: 8px 14px;
  border: none;
  background: rgba(15, 23, 42, 0.55);
  color: #94a3b8;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.seg-btn:hover {
  color: #e2e8f0;
  background: rgba(56, 189, 248, 0.1);
}

.seg-btn.active {
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.18);
}

.editor-status {
  margin-left: auto;
  font-size: 13px;
  color: #64748b;
}

.editor-status.dirty {
  color: #fbbf24;
}

.editor-status.ok {
  color: #6ee7b7;
}

.editor-layout {
  display: grid;
  gap: clamp(12px, 1.5vw, 20px);
  min-height: min(72vh, 920px);
}

.editor-layout.mode-split {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.editor-layout.mode-edit,
.editor-layout.mode-preview {
  grid-template-columns: minmax(0, 1fr);
}

.md-editor {
  width: 100%;
  min-height: min(72vh, 920px);
  resize: vertical;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(6, 10, 18, 0.75);
  color: #e2e8f0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
  tab-size: 2;
}

.md-editor:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
}

.md-preview {
  min-height: min(72vh, 920px);
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.45);
  overflow: auto;
  line-height: 1.6;
  color: #cbd5e1;
  font-size: 14px;
  word-break: break-word;
}

.md-preview table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  margin: 0.75em 0;
  font-size: 13px;
}

.md-preview th,
.md-preview td {
  padding: 8px 12px;
  white-space: nowrap;
}

.md-preview h1,
.md-preview h2,
.md-preview h3 {
  color: #f1f5f9;
  margin: 1.1em 0 0.55em;
  line-height: 1.3;
}

.md-preview h1 {
  font-size: 1.65rem;
}

.md-preview h2 {
  font-size: 1.35rem;
}

.md-preview h3 {
  font-size: 1.15rem;
}

.md-preview p {
  margin: 0.65em 0;
}

.md-preview ul,
.md-preview ol {
  padding-left: 1.35em;
  margin: 0.5em 0;
}

.md-preview code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: rgba(6, 10, 18, 0.65);
  padding: 0.12em 0.4em;
  border-radius: 6px;
  color: #7dd3fc;
}

.md-preview pre {
  background: rgba(6, 10, 18, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 12px;
  padding: 12px 14px;
  overflow-x: auto;
}

.md-preview pre code {
  background: none;
  padding: 0;
  color: #e2e8f0;
}

.md-preview a {
  color: #38bdf8;
}

.md-preview blockquote {
  margin: 0.75em 0;
  padding-left: 14px;
  border-left: 3px solid rgba(56, 189, 248, 0.45);
  color: #94a3b8;
}

@media (max-width: 900px) {
  .editor-layout.mode-split {
    grid-template-columns: 1fr;
  }
}

.editor-login-card {
  max-width: 420px;
  margin: 0 auto;
}

.editor-login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.editor-login-label {
  font-size: 14px;
  color: #94a3b8;
  font-weight: 600;
}

.editor-login-input {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(6, 10, 18, 0.75);
  color: #e2e8f0;
  font-size: 15px;
}

.editor-login-input:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
}