/* ===== CSS Variables ===== */
:root {
  --header-h:    56px;
  --sidebar-w:   252px;
  
  /* Curated Light Theme (Default) */
  --bg:          #f8fafc;
  --surface:     #ffffff;
  --surface-2:   #f1f5f9;
  --surface-3:   #e2e8f0;
  --border:      #cbd5e1;
  --text:        #0f172a;
  --text-muted:  #64748b;
  --accent:      #2563eb;
  --accent-light:#eff6ff;
  --accent-hover:#1d4ed8;
  --success:     #10b981;
  --success-bg:  #ecfdf5;
  --error:       #ef4444;
  --error-bg:    #fef2f2;
  --warning:     #f59e0b;
  --warning-bg:  #fffbeb;
  
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
  --sans:        'Inter', system-ui, sans-serif;
  --radius:      8px;
}

/* Dark Theme Overrides */
body.dark-theme,
html.dark-theme {
  --bg:          #0f1117;
  --surface:     #1a1d27;
  --surface-2:   #23263a;
  --surface-3:   #2d3148;
  --border:      #2e3250;
  --text:        #e4e6f0;
  --text-muted:  #7a80a0;
  --accent:      #6c8cfa;
  --accent-light:#1e2a56;
  --accent-hover:#859dfc;
  --success:     #34d399;
  --success-bg:  #0d2e24;
  --error:       #f87171;
  --error-bg:    #2e1010;
  --warning:     #fbbf24;
  --warning-bg:  #2e2010;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  transition: background 0.2s, color 0.2s;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
button { cursor: pointer; }
input, textarea, select, button { font-family: var(--sans); }
h1,h2,h3,h4 { margin: 0 0 .5rem; font-weight: 600; }


/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  z-index: 100;
}
.menu-toggle {
  display: none;
  background: none; border: none;
  color: var(--text); font-size: 20px; padding: 4px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  color: var(--text); font-weight: 700; font-size: 1.15rem;
  text-decoration: none;
}
.logo:hover { color: var(--accent); text-decoration: none; }
.logo-icon { font-size: 20px; }
.subtitle { color: var(--text-muted); font-size: .82rem; }

/* ===== Layout ===== */
.layout {
  display: flex;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: fixed;
  top: var(--header-h); bottom: 0; left: 0;
  overflow-y: auto;
  padding: 12px 10px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  transition: transform .25s;
  z-index: 90;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Search */
.sidebar-search { position: relative; margin-bottom: 14px; }
.sidebar-search-icon {
  position: absolute; left: 10px; top: 50%;
  transform: translateY(-50%); font-size: 13px; pointer-events: none; opacity: .6;
}
.sidebar-search-input {
  width: 100%; box-sizing: border-box;
  padding: 7px 10px 7px 32px;
  border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text);
  font-size: .85rem; outline: none; transition: border-color .15s;
}
.sidebar-search-input::placeholder { color: var(--text-muted); }
.sidebar-search-input:focus { border-color: var(--accent); }
.sidebar-search-input::-webkit-search-cancel-button { opacity: .5; cursor: pointer; }
.sidebar-no-results { font-size: .82rem; color: var(--text-muted); text-align: center; padding: 4px 0 8px; margin: 0; }

/* Sections */
.sidebar-section { margin-bottom: 18px; }
.sidebar-section-title {
  font-size: .68rem; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--text-muted);
  padding: 4px 10px 6px; display: flex; align-items: center; gap: 6px;
}

.sidebar-item {
  display: block;
  padding: 8px 12px 8px 24px;
  border-left: 2px solid var(--border);
  margin-left: 14px;
  font-size: .875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.2s ease;
  user-select: none;
}
.sidebar-item:hover {
  background: var(--surface-2);
  color: var(--text);
  border-left-color: var(--text-muted);
  text-decoration: none;
}
.sidebar-item.active {
  background: var(--accent-light);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

/* History Drawer style overrides */
.history-drawer.open {
  right: 0 !important;
}
.history-item {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.history-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Blog Card style overrides */
.blog-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12) !important;
}

/* ===== Main ===== */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 28px 28px 60px;
  min-width: 0;
}

/* ===== Home Page ===== */
.home-welcome { max-width: 960px; }
.home-hero {
  text-align: center; padding: 40px 20px 28px;
}
.home-hero-icon { font-size: 3rem; margin-bottom: 12px; }
.home-hero h1 { font-size: 2.2rem; margin-bottom: 10px; }
.home-hero p { color: var(--text-muted); font-size: 1rem; max-width: 520px; margin: 0 auto; }
.home-category { margin-bottom: 32px; }
.home-cat-title {
  font-size: .8rem; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--text-muted);
  margin-bottom: 10px; display: flex; align-items: center; gap: 6px;
}
.home-tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 8px;
}
.home-tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .875rem; color: var(--text);
  transition: border-color .15s, background .15s;
  text-decoration: none;
  display: block;
}
.home-tool-card:hover {
  border-color: var(--accent); background: var(--surface-2);
  color: var(--text); text-decoration: none;
}
.home-tool-name { font-weight: 500; }

/* ===== Tool Page ===== */
.tool-page { max-width: 820px; }
.tool-header { margin-bottom: 20px; }
.tool-header h1 { font-size: 1.55rem; margin-bottom: 6px; }
.tool-desc { color: var(--text-muted); margin: 0; font-size: .9rem; }

/* ===== Tabs ===== */
.tool-tabs {
  display: flex; flex-wrap: wrap; gap: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}
.tab-btn {
  padding: 8px 14px;
  background: none; border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted); font-size: .875rem;
  border-radius: 0; margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 500; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Buttons ===== */
.btn-primary {
  background: var(--accent); color: #fff;
  border: none; border-radius: 8px;
  padding: 9px 20px; font-size: .9rem; font-weight: 500;
  transition: background .15s, opacity .15s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-secondary {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 16px; font-size: .875rem;
  transition: background .15s, border-color .15s;
}
.btn-secondary:hover { background: var(--surface-3); border-color: var(--accent); }

.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.btn-group { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }

/* ===== Form Controls ===== */
.tool-input,
textarea.tool-input {
  width: 100%; box-sizing: border-box;
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: .875rem;
  font-family: var(--mono);
  resize: vertical; outline: none;
  transition: border-color .15s;
}
.tool-input:focus { border-color: var(--accent); }
.tool-input::placeholder { color: var(--text-muted); }

input[type="text"].tool-input,
input[type="url"].tool-input,
input[type="password"].tool-input,
input[type="search"].tool-input {
  resize: none; font-family: var(--sans);
}

.form-row {
  display: flex; flex-wrap: wrap; gap: 10px;
  align-items: center; margin: 10px 0;
}
.form-group { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.form-group label { font-size: .8rem; color: var(--text-muted); }
.form-control {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 7px 10px; font-size: .875rem;
  outline: none; transition: border-color .15s;
}
.form-control:focus { border-color: var(--accent); }

select.form-control { cursor: pointer; }

.check-row { display: flex; flex-wrap: wrap; gap: 14px; margin: 8px 0; }
.check-item {
  display: flex; align-items: center; gap: 6px;
  font-size: .875rem; cursor: pointer; user-select: none;
}
.check-item input[type="checkbox"],
.check-item input[type="radio"] { accent-color: var(--accent); cursor: pointer; }

/* ===== Results ===== */
.tool-result {
  width: 100%; box-sizing: border-box;
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 14px; font-size: .875rem;
  font-family: var(--mono); margin-top: 10px;
  white-space: pre-wrap; word-break: break-all;
  min-height: 40px;
}
pre.tool-result {
  overflow-x: auto; white-space: pre; word-break: normal;
  max-height: 400px;
}
.hash-result {
  font-size: .825rem; letter-spacing: .03em;
  word-break: break-all;
}
.result-success { border-color: var(--success) !important; }
.result-error   { border-color: var(--error) !important; color: var(--error); }

/* ===== Status Messages ===== */
.msg-success { color: var(--success); background: var(--success-bg); border: 1px solid var(--success); }
.msg-error   { color: var(--error);   background: var(--error-bg);   border: 1px solid var(--error); }
.msg-warning { color: var(--warning); background: var(--warning-bg); border: 1px solid var(--warning); }
.msg-success,.msg-error,.msg-warning {
  border-radius: 8px; padding: 10px 14px; font-size: .875rem; margin-top: 10px;
}

/* ===== Color Picker ===== */
input[type="color"] {
  width: 40px; height: 36px; border: 1px solid var(--border);
  border-radius: 6px; background: none; cursor: pointer; padding: 2px;
}
.color-preview-box {
  width: 100%; height: 60px; border-radius: 8px;
  border: 1px solid var(--border); margin-top: 10px;
  transition: background .2s;
}

/* ===== Diff Output ===== */
.diff-output { font-family: var(--mono); font-size: .82rem; }
.diff-line { padding: 2px 8px; white-space: pre-wrap; word-break: break-all; }
.diff-line-add  { background: #0d2e24; color: var(--success); }
.diff-line-del  { background: #2e1010; color: var(--error); }
.diff-line-same { color: var(--text-muted); }

/* ===== Regex Output ===== */
.regex-match-highlight { background: rgba(108,140,250,.35); border-radius: 2px; }
.regex-group-highlight { background: rgba(52,211,153,.25); border-radius: 2px; }

/* ===== Markdown Preview ===== */
.md-split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.md-preview {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px;
  overflow-y: auto; max-height: 500px;
  font-size: .9rem; line-height: 1.65;
}
.md-preview h1,.md-preview h2,.md-preview h3 { border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.md-preview code { background: var(--surface-3); border-radius: 4px; padding: 2px 5px; font-family: var(--mono); }
.md-preview pre  { background: var(--surface-3); border-radius: 8px; padding: 12px; overflow-x: auto; }
.md-preview blockquote { border-left: 3px solid var(--accent); padding-left: 12px; color: var(--text-muted); }
.md-preview table { border-collapse: collapse; width: 100%; }
.md-preview th,.md-preview td { border: 1px solid var(--border); padding: 6px 10px; }
.md-preview th { background: var(--surface-3); }

/* ===== QR Code ===== */
#qrOutput canvas { display: block; margin: 16px auto; border-radius: 8px; }
.qr-options { display: flex; flex-wrap: wrap; gap: 12px; margin: 10px 0; align-items: flex-end; }

/* ===== Parsed table ===== */
.parsed-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .875rem; }
.parsed-table th,.parsed-table td {
  padding: 8px 12px; border: 1px solid var(--border); text-align: left;
}
.parsed-table th { background: var(--surface-3); color: var(--text-muted); font-weight: 600; font-size: .75rem; text-transform: uppercase; }
.parsed-table tr:hover td { background: var(--surface-2); }

/* ===== Word Count Stats ===== */
.wc-stats {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px;
}
.wc-stat {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px; min-width: 90px; text-align: center;
}
.wc-stat-value { font-size: 1.4rem; font-weight: 700; color: var(--accent); }
.wc-stat-label { font-size: .72rem; color: var(--text-muted); margin-top: 2px; }

/* ===== Bcrypt ===== */
.cost-label { font-size: .8rem; color: var(--text-muted); margin-top: 4px; }

/* ===== Additional view classes ===== */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 16px;
}
.tool-card.sub-section { background: var(--surface-2); }

.tool-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.button-row    { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.button-row.wrap { flex-wrap: wrap; }

.tool-field { margin-bottom: 12px; }
.tool-field label { display: block; font-size: .8rem; color: var(--text-muted); margin-bottom: 4px; }

.field-row {
  display: flex; align-items: center; gap: 10px;
  margin: 8px 0;
}
.field-row label { font-size: .8rem; color: var(--text-muted); white-space: nowrap; }
.field-row select { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 6px 10px; font-size: .875rem; }

.tool-home-link {
  font-size: .8rem; color: var(--text-muted);
  display: inline-block; margin-bottom: 8px;
  text-decoration: none;
}
.tool-home-link:hover { color: var(--accent); }

.tool-note {
  font-size: .8rem; color: var(--text-muted);
  padding: 8px 12px; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 6px;
  margin: 8px 0;
}

.tool-check {
  display: flex; align-items: center; gap: 6px;
  font-size: .875rem; cursor: pointer;
}
.tool-check input[type="checkbox"] { accent-color: var(--accent); }

.tool-option-grid { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0; }

.tool-select {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 7px 10px; font-size: .875rem; outline: none;
}
.tool-select:focus { border-color: var(--accent); }

.tool-inline-inputs { display: flex; flex-wrap: wrap; gap: 8px; }
.tool-inline-inputs input { flex: 1; min-width: 80px; }

.tool-grid { display: grid; gap: 12px; }
.tool-grid.two-col { grid-template-columns: 1fr 1fr; }

.tool-split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.tool-section { margin-bottom: 20px; }
.tool-section h3 { font-size: .95rem; color: var(--text-muted); margin-bottom: 8px; }

/* Stat card (word counter etc.) */
.stat-card {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px; text-align: center; min-width: 80px;
}
.stat-card .stat-value { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.stat-card .stat-label { font-size: .72rem; color: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .sidebar {
    transform: translateX(-100%);
    top: var(--header-h);
  }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0,0,0,.5); }
  .main { margin-left: 0; padding: 20px 16px 40px; }
  .home-tool-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .md-split { grid-template-columns: 1fr; }
  .tool-tabs { gap: 2px; }
  .subtitle { display: none; }
  .header-nav { display: none !important; }
  .tool-split { grid-template-columns: 1fr; }
  .tool-grid.two-col { grid-template-columns: 1fr; }
}