/* ═══════════════════════════════════════
   TOOLKIT — OPTIMIZED FOR ENGAGEMENT
   Light-first, blue trust, coral CTAs
   60-30-10 rule. Dark mode toggle.
   ═══════════════════════════════════════ */

/* ── THEME VARIABLES ── */
:root {
  /* Light mode (default) */
  --bg-page: #f8f9fb;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-input: #f1f3f7;
  --bg-nav: rgba(255,255,255,0.88);
  --border: #e2e5ed;
  --border-hover: #c7ccd8;
  --text: #1a1d26;
  --text-dim: #5f6578;
  --text-muted: #9399a8;
  --primary: #2563eb;
  --primary-light: #dbeafe;
  --primary-dark: #1d4ed8;
  --cta: #f97316;
  --cta-hover: #ea580c;
  --cta-light: #fff7ed;
  --success: #16a34a;
  --success-light: #dcfce7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --accent: #16a34a;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  --shadow-card-hover: 0 12px 36px rgba(37,99,235,0.1);
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'Space Mono', monospace;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-pill: 100px;
}

[data-theme="dark"] {
  --bg-page: #0f1117;
  --bg-card: #181a24;
  --bg-card-hover: #1e2130;
  --bg-input: #13141e;
  --bg-nav: rgba(15,17,23,0.88);
  --border: #272a38;
  --border-hover: #3a3e50;
  --text: #e4e6f0;
  --text-dim: #8b90a5;
  --text-muted: #555972;
  --primary: #60a5fa;
  --primary-light: rgba(96,165,250,0.12);
  --primary-dark: #3b82f6;
  --cta: #fb923c;
  --cta-hover: #f97316;
  --cta-light: rgba(249,115,22,0.1);
  --success: #4ade80;
  --success-light: rgba(74,222,128,0.12);
  --danger: #f87171;
  --danger-light: rgba(248,113,113,0.1);
  --accent: #4ade80;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.25);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.3);
  --shadow-card-hover: 0 12px 36px rgba(96,165,250,0.08);
}

/* ── RESET ── */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}

body {
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

::selection{background:var(--primary-light);color:var(--primary);}
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:var(--bg-page);}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;}

a{color:inherit;text-decoration:none;}
button{cursor:pointer;border:none;font-family:var(--font-body);background:none;}
input,textarea,select{font-family:var(--font-body);}

/* ── NAV ── */
#navbar {
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--bg-nav);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:background 0.3s, border-color 0.3s;
}
.nav-inner {
  max-width:1140px;margin:0 auto;padding:0 24px;
  height:60px;display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:10px;}
.logo-icon {
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;
  background:var(--primary);border-radius:10px;font-size:17px;color:#fff;
  box-shadow:0 2px 8px rgba(37,99,235,0.3);
}
[data-theme="dark"] .logo-icon{box-shadow:0 2px 8px rgba(96,165,250,0.25);}
.logo-text{font-size:20px;font-weight:800;letter-spacing:-0.5px;color:var(--text);}

.nav-links{display:flex;align-items:center;gap:2px;}
.nav-link {
  font-size:13.5px;font-weight:600;color:var(--text-dim);
  padding:7px 14px;border-radius:var(--radius-sm);transition:all 0.2s;
}
.nav-link:hover{color:var(--text);background:var(--bg-input);}

/* Theme toggle */
.theme-toggle {
  width:40px;height:40px;border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;color:var(--text-dim);
  background:var(--bg-input);border:1px solid var(--border);
  transition:all 0.2s;margin-left:8px;
}
.theme-toggle:hover{color:var(--text);border-color:var(--border-hover);transform:scale(1.05);}

.menu-btn{display:none;background:none;color:var(--text);font-size:24px;padding:4px;}
#themeToggleMobile{display:none;}

@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg-nav);backdrop-filter:blur(20px);flex-direction:column;padding:12px;border-bottom:1px solid var(--border);}
  .nav-links.open{display:flex;}
  .menu-btn{display:block;}
  #themeToggle{display:none;}
  #themeToggleMobile{display:flex;}
}

/* ── CATEGORY PILLS ── */
.category-pills{max-width:1140px;margin:0 auto 28px;padding:0 24px;display:flex;gap:8px;flex-wrap:wrap;justify-content:center;}
.cat-pill {
  font-size:13px;font-weight:600;padding:8px 18px;
  border-radius:var(--radius-pill);border:1.5px solid var(--border);
  background:var(--bg-card);color:var(--text-dim);transition:all 0.2s;
  box-shadow:var(--shadow-sm);
}
.cat-pill:hover{border-color:var(--primary);color:var(--primary);}
.cat-pill.active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:0 2px 10px rgba(37,99,235,0.25);}
[data-theme="dark"] .cat-pill.active{box-shadow:0 2px 10px rgba(96,165,250,0.2);}

/* ── AD SLOTS ── */
.ad-slot{max-width:1140px;margin:0 auto;padding:0 24px;}
.ad-top{margin-top:74px;}
.ad-bottom{margin-bottom:20px;}
.ad-inline{margin-bottom:24px;}
.ad-placeholder {
  background:var(--bg-input);border:1.5px dashed var(--border);
  border-radius:var(--radius-sm);padding:20px;text-align:center;min-height:90px;
  display:flex;align-items:center;justify-content:center;
}
.ad-label{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);letter-spacing:1px;}

/* ── PAGES ── */
.page{display:none;}.page.active{display:block;}

/* ── HERO ── */
.hero{max-width:1140px;margin:0 auto;padding:56px 24px 40px;text-align:center;}
.hero-badge {
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;letter-spacing:0.5px;
  color:var(--primary);text-transform:uppercase;
  border:1.5px solid var(--primary-light);background:var(--primary-light);
  padding:7px 18px;border-radius:var(--radius-pill);margin-bottom:24px;
}
[data-theme="dark"] .hero-badge{border-color:rgba(96,165,250,0.2);background:rgba(96,165,250,0.08);}

.hero h1 {
  font-size:clamp(2.4rem,5vw,3.6rem);font-weight:800;
  color:var(--text);letter-spacing:-1.5px;line-height:1.12;margin-bottom:16px;
}
.hero h1 .accent{color:var(--primary);position:relative;}
.hero h1 .accent::after{
  content:'';position:absolute;bottom:2px;left:0;right:0;
  height:4px;background:var(--primary);border-radius:2px;opacity:0.2;
}
.hero-sub{font-size:1.1rem;color:var(--text-dim);max-width:540px;margin:0 auto;line-height:1.7;}

.hero-stats{display:flex;justify-content:center;gap:36px;margin-top:32px;}
.hero-stat{font-size:14px;color:var(--text-dim);}
.hero-stat strong{display:block;font-size:28px;font-weight:800;color:var(--text);font-family:var(--font-mono);}

/* ── TRUST SECTION ── */
.trust-section{max-width:1140px;margin:20px auto 50px;padding:0 24px;}
.trust-section h2{text-align:center;font-size:1.6rem;font-weight:800;color:var(--text);margin-bottom:24px;letter-spacing:-0.5px;}
.trust-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;}
.trust-card {
  background:var(--bg-card);border:1.5px solid var(--border);
  border-radius:var(--radius);padding:24px;text-align:center;
  box-shadow:var(--shadow-sm);transition:all 0.25s;
}
.trust-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px);}
.trust-icon{font-size:28px;display:block;margin-bottom:10px;}
.trust-card h3{font-size:15px;font-weight:700;color:var(--text);margin-bottom:6px;}
.trust-card p{font-size:13px;color:var(--text-dim);line-height:1.5;}

/* ── TOOLS GRID ── */
.tools-grid {
  max-width:1140px;margin:0 auto;padding:0 24px 40px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;
}
.tool-card {
  background:var(--bg-card);border:1.5px solid var(--border);
  border-radius:var(--radius);padding:24px;cursor:pointer;
  transition:all 0.28s ease;box-shadow:var(--shadow-sm);position:relative;overflow:hidden;
}
.tool-card:hover {
  border-color:var(--primary);
  box-shadow:var(--shadow-card-hover);
  transform:translateY(-4px);
}
.tool-card-icon {
  width:48px;height:48px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:14px;
}
.tool-card h3{font-size:16px;font-weight:700;color:var(--text);margin-bottom:6px;}
.tool-card p{font-size:13px;color:var(--text-dim);line-height:1.55;}
.tool-card .tag {
  display:inline-block;font-size:10px;font-family:var(--font-mono);
  text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);
  border:1px solid var(--border);padding:3px 10px;border-radius:6px;margin-top:12px;
}
.tool-card .tag-hot{border-color:rgba(249,115,22,0.3);color:var(--cta);background:var(--cta-light);}

/* ── TOOL VIEW ── */
.tool-header{max-width:860px;margin:0 auto;padding:84px 24px 20px;}
.back-btn{background:none;color:var(--text-dim);font-size:13px;font-weight:600;padding:6px 0;margin-bottom:12px;transition:color 0.2s;}
.back-btn:hover{color:var(--primary);}
.tool-header h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;color:var(--text);letter-spacing:-0.5px;margin-bottom:6px;}
.tool-header p{font-size:14px;color:var(--text-dim);}
.tool-body{max-width:860px;margin:0 auto;padding:0 24px 60px;}

/* ── SHARED UI COMPONENTS ── */
.tool-panel {
  background:var(--bg-card);border:1.5px solid var(--border);
  border-radius:var(--radius);padding:24px;margin-bottom:16px;
  box-shadow:var(--shadow-sm);transition:background 0.3s, border-color 0.3s;
}
.tool-panel-title {
  font-size:11px;font-family:var(--font-mono);text-transform:uppercase;
  letter-spacing:1.5px;color:var(--text-muted);margin-bottom:14px;font-weight:700;
}
.tool-row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-start;}
.tool-col{flex:1;min-width:200px;}

.field-label{display:block;font-size:12px;font-weight:700;color:var(--text-dim);margin-bottom:6px;}
.field-input {
  width:100%;padding:11px 14px;background:var(--bg-input);
  border:1.5px solid var(--border);border-radius:var(--radius-sm);
  color:var(--text);font-size:14px;transition:all 0.2s;outline:none;
}
.field-input::placeholder{color:var(--text-muted);}
.field-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);}
textarea.field-input{resize:vertical;min-height:120px;font-family:var(--font-mono);font-size:13px;}
select.field-input{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239399a8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px;}

/* Buttons */
.btn {
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;
  transition:all 0.2s;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 4px 16px rgba(37,99,235,0.3);transform:translateY(-1px);}
[data-theme="dark"] .btn-primary:hover{box-shadow:0 4px 16px rgba(96,165,250,0.2);}

.btn-cta{background:var(--cta);color:#fff;}
.btn-cta:hover{background:var(--cta-hover);box-shadow:0 4px 16px rgba(249,115,22,0.3);transform:translateY(-1px);}

.btn-secondary{background:var(--bg-input);color:var(--text);border:1.5px solid var(--border);}
.btn-secondary:hover{border-color:var(--border-hover);background:var(--bg-card);}

.btn-sm{padding:8px 14px;font-size:12px;}
.btn-group{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;}
.btn:disabled{opacity:0.4;pointer-events:none;}

/* Output areas */
.output-area {
  background:var(--bg-input);border:1.5px solid var(--border);border-radius:var(--radius-sm);
  padding:16px;font-family:var(--font-mono);font-size:13px;color:var(--text);
  white-space:pre-wrap;word-break:break-all;min-height:80px;max-height:400px;
  overflow-y:auto;position:relative;
}
.copy-btn {
  position:absolute;top:8px;right:8px;background:var(--bg-card);
  border:1.5px solid var(--border);color:var(--text-dim);font-size:11px;
  padding:5px 12px;border-radius:8px;font-family:var(--font-mono);font-weight:700;
  transition:all 0.2s;
}
.copy-btn:hover{color:var(--primary);border-color:var(--primary);}

/* Sliders */
.slider-wrap{display:flex;align-items:center;gap:12px;}
.slider-wrap input[type="range"]{flex:1;accent-color:var(--primary);height:5px;}
.slider-val{font-family:var(--font-mono);font-size:14px;font-weight:700;color:var(--primary);min-width:40px;text-align:right;}

/* Toggles */
.toggle-group{display:flex;gap:8px;flex-wrap:wrap;}
.toggle-opt {
  padding:8px 16px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;
  border:1.5px solid var(--border);background:var(--bg-card);color:var(--text-dim);transition:all 0.2s;
}
.toggle-opt.active{border-color:var(--primary);background:var(--primary-light);color:var(--primary);}
.toggle-opt:hover:not(.active){border-color:var(--border-hover);color:var(--text);}

/* Checkboxes */
.check-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);cursor:pointer;user-select:none;}
.check-label input[type="checkbox"]{accent-color:var(--primary);width:16px;height:16px;}

/* Stats */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;}
.stat-card{background:var(--bg-input);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:center;}
.stat-card .stat-val{font-family:var(--font-mono);font-size:1.8rem;font-weight:700;color:var(--text);}
.stat-card .stat-label{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-top:4px;}

/* Drop zone */
.drop-zone {
  border:2px dashed var(--border);border-radius:var(--radius);padding:44px;
  text-align:center;cursor:pointer;transition:all 0.3s;background:var(--bg-input);
}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--primary);background:var(--primary-light);}
.drop-zone-text{font-size:14px;color:var(--text-dim);}
.drop-zone-text strong{color:var(--primary);}
.drop-zone input[type="file"]{display:none;}

.preview-img{max-width:100%;max-height:300px;border-radius:var(--radius-sm);border:1.5px solid var(--border);margin-top:12px;}

.qr-output{display:flex;flex-direction:column;align-items:center;gap:16px;padding:24px;}
.qr-output canvas{border-radius:var(--radius-sm);border:1.5px solid var(--border);}

/* Palettes */
.palette-display{display:flex;border-radius:var(--radius);overflow:hidden;height:120px;margin-bottom:16px;border:1.5px solid var(--border);box-shadow:var(--shadow-sm);}
.palette-swatch{flex:1;cursor:pointer;position:relative;transition:flex 0.3s;display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px;}
.palette-swatch:hover{flex:1.4;}
.palette-swatch span{font-family:var(--font-mono);font-size:11px;font-weight:700;color:rgba(255,255,255,0.9);background:rgba(0,0,0,0.35);padding:2px 8px;border-radius:4px;text-transform:uppercase;opacity:0;transition:opacity 0.2s;}
.palette-swatch:hover span{opacity:1;}

/* Password strength */
.strength-bar{height:5px;border-radius:3px;background:var(--border);margin-top:8px;overflow:hidden;}
.strength-bar-fill{height:100%;border-radius:3px;transition:width 0.3s,background 0.3s;}
.strength-text{font-size:12px;font-family:var(--font-mono);margin-top:4px;}

/* File list */
.file-list{list-style:none;margin-top:12px;}
.file-item{display:flex;align-items:center;gap:12px;padding:11px 14px;background:var(--bg-input);border:1.5px solid var(--border);border-radius:var(--radius-sm);margin-bottom:6px;transition:border-color 0.2s;}
.file-item:hover{border-color:var(--border-hover);}
.file-item-icon{font-size:20px;flex-shrink:0;}
.file-item-info{flex:1;min-width:0;}
.file-item-name{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.file-item-size{font-size:11px;color:var(--text-muted);font-family:var(--font-mono);}
.file-item-remove{background:none;border:none;color:var(--text-muted);font-size:18px;padding:2px 6px;border-radius:4px;transition:all 0.2s;cursor:pointer;}
.file-item-remove:hover{color:var(--danger);background:var(--danger-light);}
.file-item-drag{color:var(--text-muted);cursor:grab;font-size:14px;flex-shrink:0;}

/* Diff checker */
.diff-container{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
@media(max-width:700px){.diff-container{grid-template-columns:1fr;}}
.diff-output{background:var(--bg-input);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:16px;font-family:var(--font-mono);font-size:13px;line-height:1.8;max-height:500px;overflow-y:auto;}
.diff-add{background:var(--success-light);color:var(--success);}
.diff-remove{background:var(--danger-light);color:var(--danger);}
.diff-line{padding:1px 6px;border-radius:3px;display:inline;}

/* Canvas preview */
.canvas-preview{text-align:center;margin:16px 0;}
.canvas-preview canvas{max-width:100%;border-radius:var(--radius-sm);border:1.5px solid var(--border);background:repeating-conic-gradient(var(--bg-input) 0% 25%,var(--bg-card) 0% 50%) 50%/16px 16px;}

/* ── FOOTER ── */
footer{background:var(--bg-card);border-top:1.5px solid var(--border);margin-top:40px;transition:background 0.3s,border-color 0.3s;}
.footer-inner{max-width:1140px;margin:0 auto;padding:48px 24px 24px;}
.footer-brand{margin-bottom:24px;}
.footer-tagline{font-size:13px;color:var(--text-muted);margin-top:6px;}
.footer-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:24px;margin-bottom:32px;}
.footer-col h4{font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);margin-bottom:12px;font-weight:700;}
.footer-col a{display:block;font-size:13px;color:var(--text-dim);padding:4px 0;transition:color 0.2s;}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{border-top:1.5px solid var(--border);padding-top:20px;}
.footer-bottom p{font-size:12px;color:var(--text-muted);text-align:center;}

/* ── TOAST ── */
.toast {
  position:fixed;bottom:24px;right:24px;background:var(--primary);color:#fff;
  font-size:13px;font-weight:700;padding:11px 22px;border-radius:var(--radius-sm);
  z-index:200;animation:toastIn 0.3s ease,toastOut 0.3s ease 1.7s forwards;
  box-shadow:0 8px 24px rgba(37,99,235,0.3);
}
[data-theme="dark"] .toast{box-shadow:0 8px 24px rgba(96,165,250,0.2);}
@keyframes toastIn{from{opacity:0;transform:translateY(20px);}to{opacity:1;transform:translateY(0);}}
@keyframes toastOut{from{opacity:1;}to{opacity:0;transform:translateY(10px);}}