/* ═══════════════════════════════════════════════════════════════════════════
   LaTeX Server — Clean Minimal Theme
   Light, warm, professional
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --clr-bg:           #faf9f6;
  --clr-surface:      #ffffff;
  --clr-surface-2:    #f5f4f0;
  --clr-border:       #e8e6e1;
  --clr-border-hover: #d4d1ca;
  --clr-grid:         rgba(0, 0, 0, 0.03);

  --clr-primary:      #c87a1a;
  --clr-primary-hover:#b56c12;
  --clr-primary-light:#e9a94b;
  --clr-primary-bg:   rgba(200,122,26,0.08);

  --clr-success:      #2d8a4e;
  --clr-success-bg:   rgba(45,138,78,0.08);
  --clr-error:        #c23a3a;
  --clr-error-bg:     rgba(194,58,58,0.06);

  --clr-text:         #1a1a1a;
  --clr-text-secondary: #555555;
  --clr-text-muted:   #888888;
  --clr-text-faint:   #b0ada6;

  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:  0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg:  0 4px 20px rgba(0,0,0,0.10);

  --transition: 0.2s ease;
}

/* ─── Animations ─────────────────────────────────────────────────────────── */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(1deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes float-alt {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(6px) rotate(-1deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  background-image: 
    linear-gradient(var(--clr-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center top;
  color: var(--clr-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── Header ─────────────────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.logo-icon {
  font-size: 22px;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
}
.logo-text {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--clr-text);
}
.logo-accent { color: var(--clr-primary); }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}
.github-link {
  color: var(--clr-text-muted);
  width: 24px;
  height: 24px;
  transition: color var(--transition);
  display: flex;
}
.github-link:hover {
  color: var(--clr-text);
}

/* Health Badge */
.health-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 99px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  font-size: 12px;
  font-weight: 500;
  color: var(--clr-text-muted);
}
.health-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--clr-text-muted);
  transition: background var(--transition);
}
.health-badge.ok   .health-dot  { background: var(--clr-success); }
.health-badge.warn .health-dot  { background: var(--clr-error); }
.health-badge.ok   .health-label { color: var(--clr-success); }
.health-badge.warn .health-label { color: var(--clr-error); }

/* ─── Layout ─────────────────────────────────────────────────────────────── */
.main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ─── Floating Nodes (Decorative) ────────────────────────────────────────── */
.floating-nodes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 99px;
  box-shadow: var(--shadow-sm);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--clr-text-secondary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.node-icon { font-size: 0.75rem; }
.node-primary {
  color: var(--clr-primary-hover);
  background: var(--clr-primary-bg);
  border-color: rgba(200,122,26,0.2);
}

/* Positioning */
.node-1 { top: 120px; left: calc(50% - 460px); animation: float 6s ease-in-out infinite; }
.node-2 { top: 200px; right: calc(50% - 480px); animation: float-alt 7s ease-in-out infinite; }
.node-3 { top: 380px; left: calc(50% - 500px); animation: float 8s ease-in-out infinite 1s; }
.node-4 { top: 480px; right: calc(50% - 440px); animation: float-alt 6.5s ease-in-out infinite 0.5s; }

@media (max-width: 1050px) {
  .floating-nodes { display: none; }
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero { 
  text-align: center; 
  padding: 0 0 8px; 
  animation: fade-in-up 0.6s ease forwards; 
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 12px;
  color: var(--clr-text);
}

.gradient-text {
  color: var(--clr-primary);
  font-style: italic;
}

.hero-subtitle {
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}
.hero-subtitle code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--clr-surface-2);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--clr-primary);
  border: 1px solid var(--clr-border);
}

/* ─── Card ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 24px;
  opacity: 0;
  animation: fade-in-up 0.6s ease forwards 0.15s;
}

/* ─── Drop Zone ──────────────────────────────────────────────────────────── */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 36px 24px;
  border: 1.5px dashed var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--clr-surface-2);
  text-align: center;
}
.drop-zone:hover,
.drop-zone:focus-visible,
.drop-zone.drag-over {
  border-color: var(--clr-primary);
  background: var(--clr-primary-bg);
  outline: none;
}

.drop-icon {
  width: 40px; height: 40px;
  color: var(--clr-text-muted);
  transition: color var(--transition);
}
.drop-zone:hover .drop-icon { color: var(--clr-primary); }

.drop-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--clr-text);
}
.drop-hint { font-size: 0.82rem; color: var(--clr-text-muted); }
.drop-hint strong { color: var(--clr-text-secondary); }

#file-input { display: none; }

/* ─── File Info ──────────────────────────────────────────────────────────── */
.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  animation: fade-in 0.25s ease;
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.file-icon { font-size: 1.3rem; }
.file-details { flex: 1; min-width: 0; }
.file-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-size { font-size: 0.78rem; color: var(--clr-text-muted); }

/* ─── Options Grid ───────────────────────────────────────────────────────── */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 600px) { .options-grid { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-muted);
}
.form-hint { font-size: 0.72rem; color: var(--clr-text-faint); line-height: 1.4; }

.form-input,
.form-select {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-text);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: border-color var(--transition);
  outline: none;
}
.form-input::placeholder { color: var(--clr-text-faint); }
.form-input:focus,
.form-select:focus {
  border-color: var(--clr-primary);
}

.select-wrapper { position: relative; }
.select-wrapper::after {
  content: '▾';
  position: absolute;
  right: 10px; top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--clr-text-muted);
  font-size: 0.8rem;
}
.form-select { appearance: none; padding-right: 28px; cursor: pointer; }

.options-grid > *:only-child,
#main-file-group { grid-column: 1 / -1; }

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  align-self: flex-start;
}
.btn-primary:hover:not(:disabled) {
  background: var(--clr-primary-hover);
}

.btn-secondary {
  background: var(--clr-surface);
  color: var(--clr-text-secondary);
  border: 1px solid var(--clr-border);
}
.btn-secondary:hover { border-color: var(--clr-border-hover); color: var(--clr-text); }

.btn-download {
  background: var(--clr-success);
  color: #fff;
}
.btn-download:hover { opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--clr-text-muted);
  border: 1px solid var(--clr-border);
  font-size: 0.82rem;
  padding: 7px 12px;
}
.btn-ghost:hover { border-color: var(--clr-border-hover); color: var(--clr-text); }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
  background: transparent;
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-icon svg { width: 15px; height: 15px; }
.btn-icon:hover { background: var(--clr-surface-2); color: var(--clr-text); }

.btn-icon-left { width: 15px; height: 15px; display: flex; }
.btn-icon-left svg { width: 15px; height: 15px; }

/* ─── Progress ───────────────────────────────────────────────────────────── */
.progress-section {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  animation: fade-in 0.25s ease;
}

.spinner { position: relative; width: 32px; height: 32px; flex-shrink: 0; }
.spinner-ring {
  width: 100%; height: 100%;
  border-radius: 50%;
  border: 2.5px solid var(--clr-border);
  border-top-color: var(--clr-primary);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress-text { display: flex; flex-direction: column; gap: 2px; }
.progress-title { font-weight: 600; font-size: 0.9rem; }
.progress-sub { font-size: 0.8rem; color: var(--clr-text-muted); }

/* ─── Result ─────────────────────────────────────────────────────────────── */
.result-section { animation: fade-in 0.3s ease; }

.result-success,
.result-error {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid;
}
.result-success {
  background: var(--clr-success-bg);
  border-color: rgba(45,138,78,0.2);
}
.result-error {
  background: var(--clr-error-bg);
  border-color: rgba(194,58,58,0.2);
}

.result-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}
.success-icon { background: rgba(45,138,78,0.12); color: var(--clr-success); }
.error-icon   { background: rgba(194,58,58,0.12); color: var(--clr-error); }

.result-info {
  flex: 1;
  display: flex; flex-direction: column; gap: 2px;
  min-width: 0;
}
.result-title { font-weight: 600; font-size: 0.9rem; }
.result-sub   { font-size: 0.8rem; color: var(--clr-text-muted); }

/* ─── Log Side Panel ─────────────────────────────────────────────────────── */
.log-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: min(400px, calc(100vw - 48px));
  height: min(280px, calc(100vh - 48px));
  z-index: 200;
  display: flex;
  flex-direction: column;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  transition: all 0.25s cubic-bezier(0.16,1,0.3,1);
  pointer-events: none;
}
.log-panel.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.log-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
}
.log-panel-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.log-panel-indicator {
  width: 18px; height: 18px;
  color: var(--clr-primary);
}
.log-panel-indicator svg { width: 100%; height: 100%; }
.log-panel-title {
  font-size: 0.85rem;
  font-weight: 600;
}
.log-panel-actions {
  display: flex;
  gap: 4px;
}

.log-panel-body {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.log-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.8;
  color: var(--clr-text-secondary);
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--clr-surface-2);
  border: none;
  margin: 0;
}

.log-panel-footer {
  flex-shrink: 0;
  padding: 8px 18px;
  border-top: 1px solid var(--clr-border);
}
.log-panel-hint {
  font-size: 0.7rem;
  color: var(--clr-text-faint);
  font-style: italic;
}

@media (max-width: 600px) {
  .log-panel {
    bottom: 12px;
    right: 12px;
    width: calc(100vw - 24px);
    height: 35vh;
  }
}

/* ─── API Section ────────────────────────────────────────────────────────── */
.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: -4px;
}

.api-endpoints { display: flex; flex-direction: column; gap: 16px; }

.endpoint {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.endpoint-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--clr-border);
}
.method-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.04em;
}
.method-post { background: var(--clr-primary-bg); color: var(--clr-primary); }
.method-get  { background: var(--clr-success-bg); color: var(--clr-success); }

.endpoint-path {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--clr-text);
}
.endpoint-desc { font-size: 0.78rem; color: var(--clr-text-muted); margin-left: auto; }

.code-block { display: flex; flex-direction: column; }
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 16px;
  font-size: 0.7rem;
  color: var(--clr-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.code-content {
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--clr-text-secondary);
  overflow-x: auto;
  white-space: pre;
  background: var(--clr-surface);
}

.copy-btn {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.copy-btn:hover { border-color: var(--clr-primary); color: var(--clr-primary); }
.copy-btn.copied { color: var(--clr-success); border-color: var(--clr-success); }

/* ─── Params Table ───────────────────────────────────────────────────────── */
.params-heading {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-muted);
  margin-bottom: -8px;
}
.table-wrapper { overflow-x: auto; }
.params-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.params-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--clr-text-muted);
  border-bottom: 1px solid var(--clr-border);
}
.params-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-text-secondary);
  vertical-align: top;
  line-height: 1.5;
}
.params-table tr:last-child td { border-bottom: none; }
.params-table td code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--clr-surface-2);
  padding: 1px 4px;
  border-radius: 3px;
  color: var(--clr-primary);
}
.badge-required {
  display: inline-block;
  padding: 1px 6px;
  font-size: 0.68rem;
  font-weight: 600;
  border-radius: 3px;
  background: var(--clr-error-bg);
  color: var(--clr-error);
}

/* ─── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 0.78rem;
  color: var(--clr-text-faint);
  border-top: 1px solid var(--clr-border);
}
.footer a { color: var(--clr-text-muted); text-decoration: none; transition: color var(--transition); }
.footer a:hover { color: var(--clr-primary); }

/* ─── Utilities ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ─── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-border-hover); }

/* ─── Focus ──────────────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
}