@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&family=Sora:wght@300;400;500;600;700&display=swap');



/* === Skip to main content (a11y) === */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--emerald);
  color: var(--slate-950);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  text-decoration: none;
  z-index: 10000;
  transition: top 150ms;
}
.skip-link:focus {
  top: 16px;
}
/* ============================================
   mdothree.com — Shared Design System
   ============================================ */

/* === CSS Variables === */
:root {
  color-scheme: dark;
  --emerald:        #10B981;
  --emerald-light:  #34D399;
  --emerald-dark:   #059669;
  --emerald-dim:    rgba(16, 185, 129, 0.12);
  --emerald-glow:   rgba(16, 185, 129, 0.25);

  --slate-950:  #020617;
  --slate-900:  #0F172A;
  --slate-800:  #1E293B;
  --slate-700:  #334155;
  --slate-600:  #475569;
  --slate-400:  #94A3B8;
  --slate-300:  #CBD5E1;
  --slate-200:  #E2E8F0;
  --slate-100:  #F1F5F9;
  --white:      #FFFFFF;

  --danger:   #EF4444;
  --warning:  #F59E0B;
  --info:     #3B82F6;

  --font-mono: 'DM Mono', 'Fira Code', monospace;
  --font-body: 'Sora', sans-serif;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  14px;
  --radius-xl:  20px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px var(--emerald-glow);

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 320ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--slate-950);
  color: var(--slate-200);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === Background Texture === */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(16,185,129,0.08) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2310B981' fill-opacity='0.02'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* === Layout === */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* === Nav === */
.nav {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo .dot { color: var(--emerald); }

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--slate-400);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.02em;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--emerald-light);
  background: var(--emerald-dim);
}

/* === Hero === */
.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--emerald);
  background: var(--emerald-dim);
  border: 1px solid rgba(16,185,129,0.2);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500;
  color: var(--white);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero h1 em {
  font-style: normal;
  color: var(--emerald);
}

.hero p {
  font-size: 1.05rem;
  color: var(--slate-400);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* === Tool Grid === */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 40px 0;
}

.tool-card {
  background: var(--slate-900);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--emerald), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.tool-card:hover {
  border-color: rgba(16,185,129,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(16,185,129,0.1);
}

.tool-card:hover::before { opacity: 1; }

.tool-card-icon {
  width: 40px; height: 40px;
  background: var(--emerald-dim);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.tool-card-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
}

.tool-card-desc {
  font-size: 0.82rem;
  color: var(--slate-400);
  line-height: 1.5;
  flex: 1;
}

.tool-card-arrow {
  font-size: 0.8rem;
  color: var(--emerald);
  font-family: var(--font-mono);
  transition: transform var(--transition);
}

.tool-card:hover .tool-card-arrow { transform: translateX(4px); }

/* === Tool Page Layout === */
.tool-page {
  padding: 48px 0 80px;
}

.tool-header {
  margin-bottom: 40px;
}

.tool-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.tool-header p {
  color: var(--slate-400);
  font-size: 0.95rem;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate-600);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a { color: var(--slate-400); text-decoration: none; }
.breadcrumb a:hover { color: var(--emerald); }
.breadcrumb span { color: var(--slate-700); }

/* === Cards / Panels === */
.panel {
  background: var(--slate-900);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-400);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

/* === Form Elements === */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--slate-400);
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--slate-800);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 10px 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-textarea {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--emerald);
  box-shadow: 0 0 0 3px var(--emerald-dim);
}

.form-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='%2394A3B8' 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;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--emerald);
  color: var(--slate-950);
}

.btn-primary:hover {
  background: var(--emerald-light);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--slate-800);
  color: var(--slate-300);
  border: 1px solid rgba(255,255,255,0.1);
}

.btn-secondary:hover {
  background: var(--slate-700);
  color: var(--white);
  border-color: rgba(255,255,255,0.18);
}

.btn-ghost {
  background: transparent;
  color: var(--slate-400);
  border: 1px solid rgba(255,255,255,0.08);
}

.btn-ghost:hover {
  background: var(--slate-800);
  color: var(--white);
}

.btn-danger {
  background: rgba(239,68,68,0.15);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.25);
}

.btn-danger:hover {
  background: rgba(239,68,68,0.25);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* === Drop Zone === */
.drop-zone {
  border: 2px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 52px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--emerald);
  background: var(--emerald-dim);
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-zone-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.drop-zone-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--white);
  margin-bottom: 8px;
}

.drop-zone-sub {
  font-size: 0.82rem;
  color: var(--slate-500);
}

/* === File List === */
.file-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.file-item {
  background: var(--slate-800);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}

.file-item-icon { font-size: 1.1rem; flex-shrink: 0; }

.file-item-name {
  font-family: var(--font-mono);
  color: var(--slate-200);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item-size {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate-500);
  flex-shrink: 0;
}

.file-item-remove {
  background: none;
  border: none;
  color: var(--slate-600);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  font-size: 1rem;
}

.file-item-remove:hover {
  color: var(--danger);
  background: rgba(239,68,68,0.1);
}

/* === Progress === */
.progress-bar {
  height: 4px;
  background: var(--slate-800);
  border-radius: 999px;
  overflow: hidden;
  margin: 16px 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--emerald), var(--emerald-light));
  border-radius: 999px;
  transition: width 200ms ease;
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

/* === Status Messages === */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 16px 0;
}

.alert-success {
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  color: var(--emerald-light);
}

.alert-error {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  color: #FCA5A5;
}

.alert-info {
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  color: #93C5FD;
}

.alert-warning {
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.25);
  color: #FCD34D;
}

/* === Code / Output === */
.code-output {
  background: var(--slate-950);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--slate-300);
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 400px;
  overflow-y: auto;
}

.code-output::-webkit-scrollbar { width: 6px; height: 6px; }
.code-output::-webkit-scrollbar-track { background: transparent; }
.code-output::-webkit-scrollbar-thumb { background: var(--slate-700); border-radius: 3px; }

/* === Stats Row === */
.stats-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 24px 0;
}

.stat-card {
  background: var(--slate-900);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  padding: 16px 22px;
  flex: 1;
  min-width: 120px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--emerald);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--slate-500);
  letter-spacing: 0.04em;
}

/* === Tabs === */
.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--slate-900);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.07);
  width: fit-content;
  margin-bottom: 24px;
}

.tab-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--slate-400);
  transition: all var(--transition);
}

.tab-btn.active {
  background: var(--emerald-dim);
  color: var(--emerald-light);
}

.tab-btn:hover:not(.active) {
  background: var(--slate-800);
  color: var(--slate-200);
}

/* === Range Input === */
.range-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

input[type="range"] {
  -webkit-appearance: none;
  flex: 1;
  height: 4px;
  background: var(--slate-700);
  border-radius: 999px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--emerald);
  cursor: pointer;
  box-shadow: 0 0 8px var(--emerald-glow);
  transition: transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.range-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--emerald);
  min-width: 40px;
  text-align: right;
}

/* === Checkbox / Toggle === */
.toggle-group {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--slate-700);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  left: 3px; top: 3px;
  width: 16px; height: 16px;
  background: var(--white);
  border-radius: 50%;
  transition: transform var(--transition);
}

.toggle input:checked + .toggle-slider { background: var(--emerald); }
.toggle input:checked + .toggle-slider::before { transform: translateX(18px); }

.toggle-label {
  font-size: 0.88rem;
  color: var(--slate-300);
}

/* === Color Chip === */
.color-input-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

input[type="color"] {
  width: 40px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  background: var(--slate-800);
  cursor: pointer;
  padding: 2px;
}

/* === Footer === */
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 32px 0;
  margin-top: 80px;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--slate-600);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--emerald); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--slate-700);
}



/* Nav right-aligned items (Pricing, Account) */
.nav-links li[style*="margin-left:auto"] {
  margin-left: auto !important;
}
.nav-links li[style*="margin-left:auto"] ~ li {
  margin-left: 0;
}
.nav-links li[style*="margin-left:auto"] a,
.nav-links li[style*="margin-left:auto"] ~ li a {
  color: var(--slate-500);
  font-size: 0.75rem;
}
.nav-links li[style*="margin-left:auto"] a:hover,
.nav-links li[style*="margin-left:auto"] ~ li a:hover {
  color: var(--emerald-light);
  background: var(--emerald-dim);
}

/* === Mobile Nav / Hamburger === */
.nav-hamburger {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  cursor: pointer;
  color: var(--slate-300);
  font-size: 1.1rem;
  line-height: 1;
  transition: background var(--transition), color var(--transition);
}
.nav-hamburger:hover {
  background: var(--slate-800);
  color: var(--white);
}

@media (max-width: 768px) {
  .nav-hamburger { display: flex; align-items: center; justify-content: center; }

  .nav-links {
    display: none;
    position: fixed;
    top: 57px;
    left: 0; right: 0;
    background: var(--slate-950);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-direction: column;
    padding: 12px 16px 20px;
    gap: 4px;
    z-index: 99;
    animation: fadeIn 150ms ease;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 10px 14px;
    font-size: 0.88rem;
    border-radius: var(--radius-md);
  }
}

/* === Animations === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.animate-fade-up { animation: fadeUp 0.5s ease both; }
.animate-fade-up-2 { animation: fadeUp 0.5s 0.1s ease both; }
.animate-fade-up-3 { animation: fadeUp 0.5s 0.2s ease both; }
.animate-fade-up-4 { animation: fadeUp 0.5s 0.3s ease both; }

.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--emerald);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* === Utilities === */
.text-mono   { font-family: var(--font-mono); }
.text-emerald{ color: var(--emerald); }
.text-muted  { color: var(--slate-500); }
.text-sm     { font-size: 0.85rem; }
.text-xs     { font-size: 0.75rem; }
.mt-4  { margin-top: 4px; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex  { display: flex; }
.items-center { align-items: center; }
.gap-8  { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none !important; }
.w-full { width: 100%; }


/* === Tool Layout — Responsive Two-Column Grid === */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.tool-layout-left {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

.tool-layout-right {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 20px;
}

.tool-layout-wide {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 20px;
}

.tool-layout-thirds {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

@media (max-width: 768px) {
  .tool-layout,
  .tool-layout-left,
  .tool-layout-right,
  .tool-layout-wide,
  .tool-layout-thirds {
    grid-template-columns: 1fr;
  }
}

/* === Responsive === */
@media (max-width: 768px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .stats-row { flex-direction: column; }
  .hero { padding: 48px 0 36px; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
  .panel { padding: 20px; }
}

/* === Light Mode (respects OS preference) === */
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light dark;
    --slate-950:  #f8fafc;
    --slate-900:  #f1f5f9;
    --slate-800:  #e2e8f0;
    --slate-700:  #cbd5e1;
    --slate-600:  #94a3b8;
    --slate-400:  #475569;
    --slate-300:  #334155;
    --slate-200:  #1e293b;
    --slate-100:  #0f172a;
    --white:      #0f172a;
    --emerald-dim: rgba(16, 185, 129, 0.10);
    --shadow-sm:  0 1px 3px rgba(0,0,0,0.12);
    --shadow-md:  0 4px 16px rgba(0,0,0,0.1);
  }

  body::before {
    background-image:
      radial-gradient(ellipse 80% 50% at 50% -10%, rgba(16,185,129,0.05) 0%, transparent 60%);
  }

  .nav {
    background: rgba(248, 250, 252, 0.9);
    border-bottom-color: rgba(0,0,0,0.08);
  }

  .panel {
    background: #ffffff;
    border-color: rgba(0,0,0,0.08);
  }

  .form-input,
  .form-select,
  .form-textarea {
    background: #ffffff;
    border-color: rgba(0,0,0,0.15);
    color: #0f172a;
  }

  .file-item {
    background: #f1f5f9;
    border-color: rgba(0,0,0,0.06);
  }

  .code-output {
    background: #f8fafc;
    border-color: rgba(0,0,0,0.08);
    color: #1e293b;
  }

  .stat-card {
    background: #f1f5f9;
    border-color: rgba(0,0,0,0.06);
  }

  .tabs {
    background: #f1f5f9;
    border-color: rgba(0,0,0,0.06);
  }

  .drop-zone {
    border-color: rgba(0,0,0,0.15);
  }

  .drop-zone:hover,
  .drop-zone.dragover {
    background: var(--emerald-dim);
    border-color: var(--emerald);
  }

  .btn-secondary {
    background: #e2e8f0;
    color: #334155;
    border-color: rgba(0,0,0,0.1);
  }

  .btn-ghost {
    color: #475569;
    border-color: rgba(0,0,0,0.1);
  }

  .btn-ghost:hover {
    background: #e2e8f0;
    color: #0f172a;
  }

  input[type="range"] {
    background: #cbd5e1;
  }
}