/* FreeToolkit — Design System 2026 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg:       #08080f;
  --surface:  #0e0e18;
  --card:     #14141f;
  --card2:    #1a1a28;
  --border:   rgba(255,255,255,0.06);
  --border2:  rgba(255,255,255,0.1);
  --primary:  #7c5af3;
  --primary2: #6344e8;
  --accent:   #22d3ee;
  --text:     #eeeef5;
  --muted:    #6868a0;
  --muted2:   #9898c0;
  --success:  #10b981;
  --error:    #f87171;
  --warning:  #fbbf24;
  --r:        12px;
  --r-lg:     20px;
  --t:        0.18s ease;
  --font:     'Inter', system-ui, sans-serif;
  --mono:     'JetBrains Mono', monospace;
  --shadow:   0 4px 24px rgba(0,0,0,0.4);
  --glow:     0 0 40px rgba(124,90,243,0.15);
}
.light {
  --bg:      #f4f4f8;
  --surface: #ffffff;
  --card:    #ffffff;
  --card2:   #f0f0f8;
  --border:  rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.12);
  --text:    #111118;
  --muted:   #6868a0;
  --muted2:  #4a4a78;
  --shadow:  0 4px 24px rgba(0,0,0,0.1);
  --glow:    0 0 40px rgba(124,90,243,0.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; transition: background var(--t), color var(--t); }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; }
button { cursor: pointer; font-family: var(--font); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── Header ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,8,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.light .site-header { background: rgba(244,244,248,0.9); }
.header-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; gap: 24px;
  height: 64px;
}
.logo {
  font-size: 1.2rem; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px; white-space: nowrap;
}
.logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.header-search {
  flex: 1; max-width: 400px;
  display: flex; align-items: center; gap: 8px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 50px; padding: 8px 16px;
  transition: border-color var(--t);
}
.header-search:focus-within { border-color: var(--primary); }
.header-search input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text); font-size: 0.875rem;
}
.header-search input::placeholder { color: var(--muted); }
.header-search .search-icon { color: var(--muted); font-size: 1rem; }
.header-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.header-btn {
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); border-radius: 50px; padding: 6px 14px;
  font-size: 0.8rem; font-weight: 500; transition: all var(--t);
  white-space: nowrap;
}
.header-btn:hover { border-color: var(--primary); color: var(--primary); }
.theme-btn {
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); border-radius: 50%; width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; transition: all var(--t);
}
.theme-btn:hover { border-color: var(--primary); }

/* ── Hero ── */
.hero {
  text-align: center; padding: 80px 24px 60px;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(124,90,243,0.12), transparent);
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(124,90,243,0.12); border: 1px solid rgba(124,90,243,0.25);
  color: var(--primary); border-radius: 50px; padding: 6px 16px;
  font-size: 0.8rem; font-weight: 600; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800;
  line-height: 1.15; margin-bottom: 16px;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero p {
  font-size: 1.1rem; color: var(--muted2); max-width: 580px; margin: 0 auto 36px;
}
.hero-search {
  display: flex; align-items: center; gap: 0;
  max-width: 560px; margin: 0 auto 36px;
  background: var(--card); border: 1.5px solid var(--border2);
  border-radius: 50px; padding: 6px 6px 6px 20px;
  box-shadow: var(--shadow);
  transition: border-color var(--t), box-shadow var(--t);
}
.hero-search:focus-within { border-color: var(--primary); box-shadow: var(--glow); }
.hero-search input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text); font-size: 1rem; font-family: var(--font);
}
.hero-search input::placeholder { color: var(--muted); }
.hero-search .btn-search {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: white; border: none; border-radius: 50px;
  padding: 10px 24px; font-weight: 600; font-size: 0.9rem;
  transition: opacity var(--t);
}
.hero-search .btn-search:hover { opacity: 0.9; }
.hero-stats {
  display: flex; justify-content: center; gap: 32px; flex-wrap: wrap;
  color: var(--muted2); font-size: 0.875rem;
}
.hero-stat { display: flex; align-items: center; gap: 6px; }
.hero-stat strong { color: var(--text); }

/* ── Categories ── */
.cats {
  max-width: 1280px; margin: 0 auto; padding: 0 24px 32px;
  display: flex; gap: 10px; flex-wrap: wrap;
}
.cat-btn {
  background: var(--card); border: 1px solid var(--border);
  color: var(--muted2); border-radius: 50px; padding: 7px 18px;
  font-size: 0.875rem; font-weight: 500; transition: all var(--t);
}
.cat-btn:hover, .cat-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  border-color: var(--primary); color: white;
}

/* ── Tools Grid ── */
.tools-section { max-width: 1280px; margin: 0 auto; padding: 0 24px 80px; }
.section-title {
  font-size: 1rem; font-weight: 600; color: var(--muted2);
  margin-bottom: 20px; display: flex; align-items: center; gap: 8px;
}
.section-title::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 24px;
  transition: all var(--t); position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}
.tool-card:hover { border-color: rgba(124,90,243,0.3); transform: translateY(-2px); box-shadow: var(--glow); background: var(--card2); }
.tool-card-top { display: flex; align-items: flex-start; gap: 14px; }
.tool-icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(124,90,243,0.15), rgba(34,211,238,0.1));
  border: 1px solid rgba(124,90,243,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.tool-meta { flex: 1; min-width: 0; }
.tool-name {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin-bottom: 4px; display: flex; align-items: center; gap: 8px;
}
.badge {
  font-size: 0.65rem; font-weight: 700; padding: 2px 8px; border-radius: 50px;
  background: rgba(251,191,36,0.15); color: var(--warning); border: 1px solid rgba(251,191,36,0.25);
}
.badge.new { background: rgba(16,185,129,0.15); color: var(--success); border-color: rgba(16,185,129,0.25); }
.cat-tag {
  font-size: 0.72rem; color: var(--muted); background: var(--card2);
  padding: 2px 8px; border-radius: 4px; display: inline-block;
}
.tool-desc { font-size: 0.875rem; color: var(--muted2); line-height: 1.5; flex: 1; }
.tool-link {
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: white; border: none; border-radius: var(--r);
  padding: 10px 16px; font-size: 0.875rem; font-weight: 600;
  transition: opacity var(--t); text-decoration: none;
}
.tool-link:hover { opacity: 0.9; color: white; }
.no-results {
  text-align: center; padding: 60px; color: var(--muted);
  display: none; grid-column: 1 / -1;
}

/* ── Tool Page ── */
.breadcrumb {
  max-width: 900px; margin: 0 auto; padding: 20px 24px 0;
  font-size: 0.82rem; color: var(--muted);
  display: flex; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.tool-hero {
  text-align: center; padding: 48px 24px 40px;
  background: radial-gradient(ellipse 60% 60% at 50% 0%, rgba(124,90,243,0.08), transparent);
}
.tool-hero-icon {
  width: 72px; height: 72px; border-radius: 20px; margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(124,90,243,0.2), rgba(34,211,238,0.1));
  border: 1px solid rgba(124,90,243,0.3);
  display: flex; align-items: center; justify-content: center; font-size: 2rem;
}
.tool-hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.tool-hero p { color: var(--muted2); max-width: 500px; margin: 0 auto; }
.tool-layout {
  max-width: 900px; margin: 0 auto; padding: 0 24px 60px;
  display: grid; gap: 24px;
}
.tool-box {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px; box-shadow: var(--shadow);
}
.tool-box h2 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--muted2); }

/* ── Form Controls ── */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 0.875rem; font-weight: 500; margin-bottom: 6px; color: var(--muted2); }
input[type=text], input[type=number], input[type=date], textarea, select {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 11px 14px; color: var(--text);
  font-family: var(--font); font-size: 0.9rem; outline: none;
  transition: border-color var(--t);
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }
input::placeholder, textarea::placeholder { color: var(--muted); }
textarea { resize: vertical; min-height: 140px; }
select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236868a0' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }

.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 500px) { .input-row { grid-template-columns: 1fr; } }

.range-wrap { display: flex; align-items: center; gap: 12px; }
input[type=range] {
  flex: 1; -webkit-appearance: none; height: 4px;
  background: var(--border2); border-radius: 2px; outline: none; border: none; padding: 0;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--primary); cursor: pointer;
}
.range-val { font-size: 1rem; font-weight: 700; color: var(--primary); min-width: 28px; text-align: right; }

.checkbox-row { display: flex; align-items: center; gap: 8px; margin: 8px 0; }
.checkbox-row input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }
.checkbox-row label { margin: 0; cursor: pointer; color: var(--text); }
.checkboxes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: var(--r); font-size: 0.9rem;
  font-weight: 600; border: none; transition: all var(--t); cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: white;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-secondary {
  background: var(--card2); border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-success { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.25); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.btn-full { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 0.8rem; }

/* ── Output / Result ── */
.result-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 16px; margin-top: 16px;
  font-family: var(--mono); font-size: 0.9rem; word-break: break-all;
  color: var(--accent); min-height: 60px; position: relative;
}
.result-box.large { font-family: var(--font); font-size: 0.9rem; color: var(--text); }
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: var(--card2); border: 1px solid var(--border);
  color: var(--muted2); border-radius: 6px; padding: 4px 10px;
  font-size: 0.75rem; font-weight: 500; cursor: pointer; transition: all var(--t);
}
.copy-btn:hover { border-color: var(--primary); color: var(--primary); }
.copy-btn.copied { color: var(--success); border-color: var(--success); }

/* ── Stats Row ── */
.stats-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 12px; margin: 16px 0;
}
.stat-chip {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 12px 14px; text-align: center;
}
.stat-chip .val { font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.stat-chip .lbl { font-size: 0.72rem; color: var(--muted); margin-top: 2px; }

/* ── Tabs ── */
.tabs { display: flex; gap: 4px; background: var(--surface); border-radius: var(--r); padding: 4px; margin-bottom: 16px; }
.tab {
  flex: 1; text-align: center; padding: 8px 12px;
  border-radius: 8px; font-size: 0.83rem; font-weight: 500;
  border: none; background: none; color: var(--muted2); cursor: pointer; transition: all var(--t);
}
.tab.active { background: var(--primary); color: white; }

/* ── Color Swatch ── */
.swatch {
  width: 100%; height: 80px; border-radius: var(--r); margin-bottom: 12px;
  border: 1px solid var(--border); transition: background 0.1s;
}

/* ── Slider Results ── */
.result-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); }
.result-row:last-child { border-bottom: none; }
.result-label { font-size: 0.875rem; color: var(--muted2); }
.result-val { font-size: 0.95rem; font-weight: 700; color: var(--text); }

/* ── Alert / Info ── */
.alert {
  padding: 12px 16px; border-radius: var(--r); font-size: 0.875rem; margin-top: 12px;
}
.alert-success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.25); color: var(--success); }
.alert-error   { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.25); color: var(--error); }
.alert-info    { background: rgba(124,90,243,0.1); border: 1px solid rgba(124,90,243,0.25); color: var(--primary); }
.alert-warn    { background: rgba(251,191,36,0.1); border: 1px solid rgba(251,191,36,0.25); color: var(--warning); }

/* ── How to use ── */
.how-to { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.how-to summary {
  padding: 16px 20px; font-weight: 600; cursor: pointer;
  display: flex; align-items: center; gap: 8px; list-style: none;
}
.how-to summary::-webkit-details-marker { display: none; }
.how-to summary::after { content: '›'; margin-left: auto; transition: transform var(--t); font-size: 1.2rem; color: var(--muted); }
.how-to[open] summary::after { transform: rotate(90deg); }
.how-to ol { padding: 0 20px 20px; }
.how-to li { padding: 6px 0; color: var(--muted2); font-size: 0.9rem; }
.how-to li strong { color: var(--text); }

/* ── Related Tools ── */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.related-card {
  background: var(--card2); border: 1px solid var(--border);
  border-radius: var(--r); padding: 14px; display: flex; align-items: center; gap: 10px;
  transition: all var(--t); color: var(--text); font-size: 0.875rem; font-weight: 500;
}
.related-card:hover { border-color: var(--primary); color: var(--primary); background: rgba(124,90,243,0.06); }
.related-icon { font-size: 1.3rem; flex-shrink: 0; }

/* ── BMI ── */
.bmi-scale {
  height: 14px; border-radius: 50px; margin: 16px 0 4px;
  background: linear-gradient(to right, #60a5fa, #34d399, #fbbf24, #fb923c, #f87171);
  position: relative;
}
.bmi-marker {
  position: absolute; top: -4px; width: 22px; height: 22px;
  background: white; border: 3px solid var(--primary); border-radius: 50%;
  transform: translateX(-50%); transition: left 0.4s ease;
}
.bmi-labels { display: flex; justify-content: space-between; font-size: 0.7rem; color: var(--muted); margin-top: 4px; }

/* ── EMI Table ── */
.amort-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; margin-top: 12px; }
.amort-table th { background: var(--surface); padding: 8px 10px; text-align: left; color: var(--muted2); font-weight: 600; }
.amort-table td { padding: 7px 10px; border-bottom: 1px solid var(--border); color: var(--muted2); }
.amort-table tr:last-child td { border-bottom: none; }
.amort-table tbody tr:hover td { background: rgba(124,90,243,0.04); }
.table-wrap { max-height: 300px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--r); }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border); padding: 32px 24px;
  text-align: center; color: var(--muted); font-size: 0.85rem;
}
.footer-inner { max-width: 1280px; margin: 0 auto; }
.footer-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 12px; }
.footer-links a { color: var(--muted2); }
.footer-links a:hover { color: var(--primary); }
.footer-network { display: flex; justify-content: center; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.footer-network-label { color: var(--muted); font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-network a { color: var(--muted2); font-size: 0.88rem; font-weight: 500; }
.footer-network a:hover { color: var(--primary); }

/* ── Utility ── */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mono { font-family: var(--mono); }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.flex { display: flex; align-items: center; gap: 10px; }
.flex-wrap { flex-wrap: wrap; }
.fw-700 { font-weight: 700; }
.text-success { color: var(--success); }
.text-error   { color: var(--error); }
.text-muted   { color: var(--muted2); }
.text-primary { color: var(--primary); }

/* ── Responsive ── */
.header-mobile-tools { display: none; }

@media (max-width: 768px) {
  .hero { padding: 56px 20px 44px; }
  .hero h1 { font-size: 2rem; }
  .header-search { display: none; }
  .header-btn { display: none; }
  .header-mobile-tools { display: inline-flex; align-items: center; margin-left: auto; font-size: 0.8rem; font-weight: 600; color: var(--primary); background: var(--card); border: 1px solid var(--border); border-radius: 50px; padding: 6px 14px; white-space: nowrap; }
  .tool-hero h1 { font-size: 1.5rem; }
  .tool-layout { padding: 0 16px 48px; }
  .input-row { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .checkboxes-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .cats { gap: 6px; padding: 0 12px; flex-wrap: wrap; }
  .cat-btn { padding: 6px 12px; font-size: 0.78rem; }
  .tool-box { padding: 16px; }
  .btn-row { flex-direction: column; }
  .btn-row .btn { width: 100%; }
  .tool-hero { padding: 28px 16px 20px; }
  .hero h1 { font-size: 1.7rem; }
}