/* ==========================================================================
   UltraTool360 — techsoch.org
   Palette: #4F46E5 primary · #2563EB secondary · #06B6D4 accent
            #F8FAFC background · #111827 dark
   ========================================================================== */

:root {
  --primary: #4F46E5;
  --secondary: #2563EB;
  --cyan: #06B6D4;
  --ink: #111827;

  --grad: linear-gradient(120deg, #4F46E5 0%, #2563EB 50%, #06B6D4 100%);
  --grad-soft: linear-gradient(120deg, rgba(79,70,229,.14), rgba(6,182,212,.14));

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-xs: 0 1px 2px rgba(17, 24, 39, .05);
  --shadow: 0 4px 18px rgba(17, 24, 39, .07);
  --shadow-lg: 0 18px 46px rgba(17, 24, 39, .13);
  --shadow-glow: 0 12px 34px rgba(79, 70, 229, .28);
  --maxw: 1180px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition: .25s cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  /* legacy aliases still referenced by a few tool pages */
  --brand-dark: #111827;
  --brand-green: #4F46E5;
  --brand-sage: #06B6D4;
}

/* Light mode (default) */
:root,
[data-theme="light"] {
  --bg: #F8FAFC;
  --bg-2: #eef2f9;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --glass: rgba(255, 255, 255, .72);
  --glass-brd: rgba(255, 255, 255, .9);
  --text: #1f2937;
  --heading: #111827;
  --muted: #64748b;
  --accent: #4F46E5;
  --accent-hover: #4338ca;
  --accent-soft: #06B6D4;
  --border: #e2e8f0;
  --nav-bg: rgba(255, 255, 255, .78);
}

/* Dark mode */
[data-theme="dark"] {
  --bg: #0b1120;
  --bg-2: #0f172a;
  --surface: #111827;
  --surface-2: #1b263b;
  --glass: rgba(23, 32, 53, .66);
  --glass-brd: rgba(148, 163, 184, .18);
  --text: #e2e8f0;
  --heading: #ffffff;
  --muted: #94a3b8;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: #22d3ee;
  --border: #253046;
  --nav-bg: rgba(11, 17, 32, .78);
  --shadow: 0 4px 18px rgba(0, 0, 0, .35);
  --shadow-lg: 0 18px 46px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.68;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

h1, h2, h3, h4 { color: var(--heading); line-height: 1.22; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: 2.1rem; margin-bottom: .6rem; }
h2 { font-size: 1.55rem; margin: 1.7rem 0 .8rem; }
h3 { font-size: 1.15rem; margin: 1.2rem 0 .5rem; }
p { margin-bottom: 1rem; }

img { max-width: 100%; height: auto; }

:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 2px; border-radius: 6px; }

::selection { background: rgba(79, 70, 229, .22); }

/* Custom scrollbar — small premium touch */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--surface-2); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #4F46E5, #06B6D4); border-radius: 10px; border: 3px solid var(--surface-2); }

/* ---------------------------------------------------------------- Premium page loader */
#ut-loader {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 18px;
  background: var(--bg);
  transition: opacity .5s var(--ease-out), visibility .5s;
}
#ut-loader.done { opacity: 0; visibility: hidden; }
.ut-ring { width: 54px; height: 54px; position: relative; }
.ut-ring span {
  position: absolute; inset: 0; border-radius: 50%;
  border: 3px solid transparent; border-top-color: #4F46E5; border-right-color: #06B6D4;
  animation: utspin .9s linear infinite;
}
.ut-ring span:nth-child(2) { inset: 9px; border-top-color: #2563EB; border-right-color: transparent; animation-duration: 1.35s; animation-direction: reverse; }
.ut-load-text { font-size: .82rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
@keyframes utspin { to { transform: rotate(360deg); } }

/* ---------------------------------------------------------------- Scroll reveal */
.reveal { opacity: 0; transform: translateY(26px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.in { opacity: 1 !important; transform: none !important; }
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* ---------------------------------------------------------------- Header/Nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled { box-shadow: 0 6px 26px rgba(17, 24, 39, .09); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.28rem; font-weight: 800; color: var(--heading);
  transition: transform var(--transition);
}
.brand:hover { transform: translateY(-1px); }
.brand .dot {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.logo-mark { display: inline-flex; flex: 0 0 auto; }
.logo-mark svg { display: block; border-radius: 12px; box-shadow: 0 6px 16px rgba(79, 70, 229, .38); transition: transform var(--transition), box-shadow var(--transition); }
.brand:hover .logo-mark svg { transform: rotate(-6deg) scale(1.06); box-shadow: 0 8px 22px rgba(6, 182, 212, .45); }
.brand-text { line-height: 1; letter-spacing: -.02em; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  position: relative; padding: 9px 15px; border-radius: var(--radius-sm);
  color: var(--text); font-weight: 500; transition: color var(--transition), background var(--transition);
}
.nav-links a::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 2px;
  background: var(--grad); border-radius: 2px; transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease-out);
}
.nav-links a:hover { color: var(--accent); background: var(--surface-2); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--accent); }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; margin-left: 8px;
  border: 1px solid var(--border); border-radius: 50%;
  background: var(--surface); color: var(--text);
  cursor: pointer; font-size: 1.05rem; transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: rotate(18deg) scale(1.08); box-shadow: var(--shadow-glow); }

.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.6rem; cursor: pointer; }

/* ---------------------------------------------------------------- Mega dropdown */
.nav-links .has-mega { position: static; }
.nav-links .has-mega > a { display: inline-flex; align-items: center; gap: 5px; }
.caret { font-size: .65rem; opacity: .7; transition: transform .25s var(--ease-out); }
.has-mega:hover .caret { transform: rotate(180deg); }
.mega {
  position: absolute; left: 0; right: 0; top: 100%;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 28px 0; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s var(--ease-out), transform .25s var(--ease-out), visibility .25s; z-index: 90;
}
.has-mega:hover > .mega, .has-mega:focus-within > .mega { opacity: 1; visibility: visible; transform: none; }
.mega-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 20px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px 26px;
}
.mega-col h4 {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; margin-bottom: 11px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.mega-col ul { list-style: none; }
.mega-col li { margin: 4px 0; }
.mega-col a { display: block; font-size: .9rem; color: var(--text); padding: 3px 8px; border-radius: 6px; }
.mega-col a::after { display: none; }
.mega-col a:hover { color: var(--accent); background: var(--surface-2); transform: translateX(4px); }
.mega-cta {
  background: var(--grad); border-radius: var(--radius); padding: 20px; color: #fff; align-self: start;
  box-shadow: var(--shadow-glow); position: relative; overflow: hidden;
}
.mega-cta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120px circle at 80% 0%, rgba(255,255,255,.34), transparent 70%);
}
.mega-cta h4, .mega-cta p, .mega-cta .btn { position: relative; }
.mega-cta h4 { color: #fff; margin-bottom: 6px; font-size: 1.02rem; }
.mega-cta p { font-size: .84rem; color: rgba(255,255,255,.9); margin-bottom: 13px; }
.mega-cta .btn { background: #fff; color: var(--primary); padding: 9px 15px; font-size: .85rem; }
.mega-cta .btn:hover { background: #fff; color: var(--secondary); }

/* ---------------------------------------------------------------- HERO */
.hero {
  position: relative; overflow: hidden; isolation: isolate;
  background: #0b1120;
  color: #fff; text-align: center; padding: 96px 0 84px;
}
.hero-inner { position: relative; z-index: 3; }

/* Animated aurora mesh background */
.hero::before {
  content: ""; position: absolute; inset: -30%; z-index: 0;
  background:
    radial-gradient(closest-side, #4F46E5, transparent) 18% 22% / 62% 62% no-repeat,
    radial-gradient(closest-side, #2563EB, transparent) 78% 26% / 58% 58% no-repeat,
    radial-gradient(closest-side, #06B6D4, transparent) 62% 80% / 66% 66% no-repeat,
    radial-gradient(closest-side, #7c3aed, transparent) 24% 78% / 54% 54% no-repeat;
  filter: blur(46px); opacity: .62;
  animation: aurora 22s ease-in-out infinite alternate;
}
@keyframes aurora {
  0%   { transform: translate3d(-2%, -1%, 0) rotate(0deg) scale(1); }
  50%  { transform: translate3d(3%, 2%, 0) rotate(6deg) scale(1.08); }
  100% { transform: translate3d(-1%, 3%, 0) rotate(-5deg) scale(1.04); }
}
/* Fine grid overlay for depth */
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 78% 68% at 50% 42%, #000 35%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 78% 68% at 50% 42%, #000 35%, transparent 78%);
}

/* Floating orbs (parallax targets) */
.hero-blobs { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1; }
.hero-blobs .blob { position: absolute; border-radius: 50%; filter: blur(52px); opacity: .5; will-change: transform; }
.blob.b1 { width: 300px; height: 300px; background: #4F46E5; top: -70px; left: 5%;  animation: float1 16s ease-in-out infinite; }
.blob.b2 { width: 340px; height: 340px; background: #06B6D4; bottom: -110px; right: 6%; animation: float2 19s ease-in-out infinite; }
.blob.b3 { width: 210px; height: 210px; background: #2563EB; top: 18%; left: 34%; animation: float3 14s ease-in-out infinite; }
.blob.b4 { width: 240px; height: 240px; background: #7c3aed; bottom: 2%; left: 16%; animation: float2 17s ease-in-out infinite; }
.blob.b5 { width: 180px; height: 180px; background: #06B6D4; top: 8%; right: 22%; animation: float1 13s ease-in-out infinite; }
@keyframes float1 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(38px, 28px) scale(1.07); } }
@keyframes float2 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-34px, -26px) scale(1.09); } }
@keyframes float3 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(24px, -32px) scale(1.06); } }

/* Cursor-following glow */
.hero-glow {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 34%),
              rgba(99,102,241,.42), rgba(6,182,212,.2) 44%, transparent 70%);
  transition: background .1s linear;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px;
  padding: 7px 17px; border-radius: 50px; font-size: .84rem; font-weight: 500;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
  color: #e6ecff; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  animation: badgeIn .8s var(--ease-out) both;
}
.hero-badge .pulse {
  width: 7px; height: 7px; border-radius: 50%; background: #22d3ee;
  box-shadow: 0 0 0 0 rgba(34,211,238,.7); animation: pulse 2s infinite;
}
@keyframes pulse { 70% { box-shadow: 0 0 0 9px rgba(34,211,238,0); } 100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); } }
@keyframes badgeIn { from { opacity: 0; transform: translateY(-12px); } }

.hero h1 {
  color: #fff; font-size: clamp(2.2rem, 5.4vw, 3.9rem); line-height: 1.08;
  margin-bottom: .7rem; letter-spacing: -.035em; font-weight: 800;
  animation: heroUp .9s .06s var(--ease-out) both;
}
.hero .accent {
  background: linear-gradient(100deg, #a5b4fc, #22d3ee, #818cf8, #a5b4fc);
  background-size: 300% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 300% center; } }
@keyframes heroUp { from { opacity: 0; transform: translateY(24px); } }
.hero p {
  color: rgba(255,255,255,.8); font-size: 1.12rem; max-width: 610px; margin: 0 auto 2rem;
  animation: heroUp .9s .16s var(--ease-out) both;
}

.search-wrap {
  max-width: 590px; margin: 0 auto; position: relative;
  animation: heroUp .9s .26s var(--ease-out) both;
}
.search-wrap::before {
  content: ""; position: absolute; inset: -2px; border-radius: 50px;
  background: var(--grad); opacity: 0; filter: blur(9px); transition: opacity var(--transition);
}
.search-wrap:focus-within::before { opacity: .85; }
.search-wrap input[type="text"] {
  position: relative; width: 100%; padding: 17px 22px 17px 54px; font-size: 1rem;
  border: 1px solid rgba(255,255,255,.16); border-radius: 50px;
  background: rgba(255,255,255,.96); color: #111827;
  box-shadow: 0 18px 44px rgba(0,0,0,.3); transition: transform var(--transition);
}
.search-wrap input[type="text"]::placeholder { color: #94a3b8; }
.search-wrap input[type="text"]:focus { outline: none; transform: translateY(-2px); box-shadow: 0 18px 44px rgba(0,0,0,.3); }
.search-wrap .search-icon { position: absolute; left: 20px; top: 50%; transform: translateY(-50%); color: var(--primary); z-index: 2; }

.hero-cats {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 26px;
  animation: heroUp .9s .36s var(--ease-out) both;
}
.hchip {
  display: inline-flex; align-items: center; gap: 7px; padding: 9px 17px; border-radius: 50px;
  background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.2);
  color: #eef2ff; font-size: .89rem; font-weight: 500;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}
.hchip:hover { background: #fff; color: var(--primary); transform: translateY(-3px) scale(1.03); box-shadow: 0 10px 26px rgba(0,0,0,.28); }

/* Hero stats with animated numbers */
.hero-stats {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 40px;
  animation: heroUp .9s .46s var(--ease-out) both;
}
.hstat {
  min-width: 148px; padding: 17px 22px; border-radius: var(--radius);
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  transition: transform var(--transition), background var(--transition);
}
.hstat:hover { transform: translateY(-4px); background: rgba(255,255,255,.12); }
.hstat b {
  display: block; font-size: 1.85rem; font-weight: 800; line-height: 1.1; letter-spacing: -.03em;
  background: linear-gradient(120deg, #fff, #a5b4fc); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hstat span { font-size: .8rem; color: rgba(255,255,255,.66); letter-spacing: .04em; }

.scroll-cue {
  display: inline-flex; flex-direction: column; align-items: center; gap: 6px;
  margin-top: 42px; color: rgba(255,255,255,.5); font-size: .74rem; letter-spacing: .16em; text-transform: uppercase;
  animation: bob 2.4s ease-in-out infinite;
}
.scroll-cue i { font-style: normal; font-size: 1.05rem; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(7px); } }

/* ---------------------------------------------------------------- Sections & cards */
.section { padding: 44px 0; }
.section-head { display: flex; align-items: center; gap: 13px; margin-bottom: 22px; }
.section-head::before { content: ""; width: 5px; height: 28px; background: var(--grad); border-radius: 4px; }
.section-head h2 { margin: 0; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(238px, 1fr)); gap: 20px; }
.tool-card {
  position: relative; display: block; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
  box-shadow: var(--shadow-xs); overflow: hidden;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color var(--transition);
}
/* animated gradient border on hover */
.tool-card::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1.5px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity var(--transition);
}
.tool-card::after {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: var(--grad-soft); transition: opacity var(--transition);
}
.tool-card:hover { transform: translateY(-7px); box-shadow: var(--shadow-lg); }
.tool-card:hover::before, .tool-card:hover::after { opacity: 1; }
.tool-card > * { position: relative; z-index: 1; }
.tool-card .icon {
  width: 50px; height: 50px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-size: 1.45rem; background: var(--surface-2); margin-bottom: 14px;
  transition: transform .35s var(--ease-out), background var(--transition);
}
.tool-card:hover .icon { transform: scale(1.12) rotate(-7deg); background: #fff; box-shadow: var(--shadow); }
[data-theme="dark"] .tool-card:hover .icon { background: var(--surface); }
.tool-card h3 { margin: 0 0 5px; font-size: 1.06rem; color: var(--heading); transition: color var(--transition); }
.tool-card:hover h3 { color: var(--accent); }
.tool-card p { margin: 0; font-size: .88rem; color: var(--muted); }
.no-results { text-align: center; color: var(--muted); padding: 30px; display: none; }

/* ---------------------------------------------------------------- Tool page layout */
.tool-page { padding: 34px 0 54px; }
.breadcrumb { font-size: .85rem; color: var(--muted); margin-bottom: 14px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.tool-app {
  position: relative; background: var(--glass);
  backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); margin-bottom: 34px;
}
.dropzone {
  position: relative; border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 40px 20px; text-align: center; color: var(--muted); cursor: pointer;
  background: var(--surface-2); transition: all var(--transition);
}
.dropzone:hover { border-color: var(--accent); background: var(--surface); transform: translateY(-2px); box-shadow: var(--shadow); }
.dropzone.drag { border-color: var(--accent); color: var(--accent); background: var(--surface); box-shadow: var(--shadow-glow); }
.dropzone strong { color: var(--accent); }

.field { margin-bottom: 17px; }
.field label { display: block; font-weight: 600; margin-bottom: 7px; font-size: .9rem; color: var(--heading); }
input[type="text"], input[type="number"], input[type="date"], input[type="url"], input[type="email"],
select, textarea {
  width: 100%; padding: 12px 14px; font-size: 1rem; font-family: var(--font);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text);
  transition: border var(--transition), box-shadow var(--transition), background var(--transition);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent); outline: none; background: var(--surface);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, .14);
}
textarea { resize: vertical; min-height: 120px; }

.row { display: flex; gap: 14px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }

.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px; font-size: 1rem; font-weight: 600; font-family: var(--font);
  border: none; border-radius: var(--radius-sm); cursor: pointer; overflow: hidden;
  background: var(--grad); background-size: 160% auto; color: #fff;
  box-shadow: 0 6px 18px rgba(79, 70, 229, .3);
  transition: transform var(--transition), box-shadow var(--transition), background-position .5s var(--ease-out);
}
.btn:hover { background-position: right center; transform: translateY(-3px); box-shadow: var(--shadow-glow); color: #fff; }
.btn:active { transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-secondary { background: var(--surface-2); background-image: none; color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.btn-secondary:hover { background: var(--surface); background-image: none; color: var(--accent); border-color: var(--accent); box-shadow: var(--shadow); }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }

.result {
  margin-top: 18px; padding: 17px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border); word-break: break-word;
  animation: popIn .4s var(--ease-out);
}
@keyframes popIn { from { opacity: 0; transform: translateY(8px) scale(.99); } }
.result.big { font-size: 1.45rem; font-weight: 800; text-align: center; letter-spacing: -.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: .88rem; }
.error { color: #dc2626; font-weight: 600; }
[data-theme="dark"] .error { color: #fca5a5; }
.ok { color: #059669; font-weight: 600; }
[data-theme="dark"] .ok { color: #6ee7b7; }

.output-code {
  font-family: "SF Mono", Menlo, Consolas, monospace; font-size: .89rem;
  white-space: pre-wrap; background: #0f172a; color: #e2e8f0;
  padding: 15px; border-radius: var(--radius-sm); overflow: auto; border: 1px solid #1e293b;
}

.file-list { list-style: none; margin: 15px 0; }
.file-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 13px; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); margin-bottom: 7px; font-size: .9rem;
  transition: transform var(--transition), border-color var(--transition);
  animation: popIn .35s var(--ease-out);
}
.file-list li:hover { transform: translateX(4px); border-color: var(--accent); }
.file-list button { background: none; border: none; color: #dc2626; cursor: pointer; font-size: 1.1rem; transition: transform var(--transition); }
.file-list button:hover { transform: scale(1.25); }

.chip { display: inline-block; padding: 4px 12px; border-radius: 50px; background: var(--surface-2); font-size: .8rem; color: var(--muted); }

/* ---------------------------------------------------------------- PDF page preview */
.pdf-preview {
  display: flex; flex-wrap: wrap; gap: 18px; justify-content: center;
  align-items: flex-start; padding: 24px; margin-bottom: 18px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius);
  min-height: 60px;
}
.pdf-preview:empty { display: none; }
.pdf-loading { color: var(--muted); text-align: center; padding: 18px; width: 100%; }
.pdf-page { display: flex; flex-direction: column; align-items: center; gap: 7px; transition: opacity .25s, transform .25s var(--ease-out); animation: popIn .4s var(--ease-out); }
.pdf-thumb {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--shadow); overflow: hidden; line-height: 0;
  transition: outline .15s, transform .25s var(--ease-out), box-shadow var(--transition);
}
.pdf-page:hover .pdf-thumb { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.pdf-thumb canvas { display: block; width: 130px; height: auto; }
.pdf-pnum {
  font-size: .82rem; color: var(--muted); font-weight: 600;
  min-width: 26px; text-align: center; padding: 2px 9px; border-radius: 50px; background: var(--surface);
}
.pdf-page.dim { opacity: .3; }
.pdf-page.sel .pdf-thumb { outline: 3px solid var(--accent); }
.pdf-page.sel .pdf-pnum { background: var(--grad); color: #fff; }
.pdf-page.marked .pdf-thumb { outline: 3px solid #dc2626; opacity: .55; }
.pdf-page.marked .pdf-pnum { background: #dc2626; color: #fff; }
.pdf-page.marked .pdf-pnum::after { content: " ✕"; }
.pdf-page.clickable { cursor: pointer; }
.pdf-page.clickable:hover .pdf-thumb { outline: 3px solid var(--accent-soft); }
.pdf-page.draggable { cursor: grab; }
.pdf-page.draggable:active { cursor: grabbing; }
.pdf-page.drag-over .pdf-thumb { outline: 3px dashed var(--accent); transform: scale(1.05); }
.pdf-page .rotor { transition: transform .25s; }

/* ---------------------------------------------------------------- PDF Editor */
.pdf-toolbar {
  display: flex; flex-wrap: wrap; gap: 7px; align-items: center;
  padding: 11px 13px; margin-bottom: 15px;
  background: var(--glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border); border-radius: 14px;
  position: sticky; top: 78px; z-index: 30; box-shadow: var(--shadow);
}
.pdf-toolbar .tool, .pdf-toolbar .tbtn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 9px 13px; font-size: .87rem; font-weight: 600; font-family: var(--font);
  background: var(--surface-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; cursor: pointer; transition: all var(--transition);
}
.pdf-toolbar .tool:hover, .pdf-toolbar .tbtn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.pdf-toolbar .tool.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 5px 14px rgba(79,70,229,.34); }
.pdf-toolbar .tsep { width: 1px; height: 26px; background: var(--border); margin: 0 4px; }
.pdf-toolbar label.tbtn { position: relative; }
.pdf-toolbar input[type="color"] { width: 34px; height: 30px; border: none; background: none; padding: 0; cursor: pointer; vertical-align: middle; }
.pdf-toolbar input[type="number"] { width: 62px; padding: 6px 8px; }
.pdf-toolbar .save { background: var(--grad); color: #fff; border-color: transparent; margin-left: auto; box-shadow: 0 5px 14px rgba(79,70,229,.34); }
.pdf-toolbar .save:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.pdf-editor-host {
  max-height: 74vh; overflow: auto; padding: 20px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px;
  display: flex; flex-direction: column; align-items: center; gap: 20px;
}
.pdf-edit-page { position: relative; background: #fff; box-shadow: var(--shadow-lg); flex: 0 0 auto; border-radius: 4px; }
.pdf-edit-page canvas { display: block; }
.pdf-edit-page .draw { position: absolute; inset: 0; touch-action: none; }
.pdf-textlayer { position: absolute; inset: 0; overflow: hidden; }
.pdf-textlayer .tspan { position: absolute; cursor: text; border-radius: 2px; }
.pdf-textlayer .tspan:hover { background: rgba(79,70,229,.22); outline: 1px solid var(--primary); }
.pdf-text-el {
  position: absolute; min-width: 24px; padding: 2px 4px; margin: 0;
  cursor: move; white-space: pre-wrap; line-height: 1.25; font-weight: 600;
  outline: 1px dashed transparent; border-radius: 3px;
}
.pdf-text-el:focus { outline: 1px solid var(--primary); background: rgba(79,70,229,.07); cursor: text; }
.pdf-text-el.selected { outline: 1px dashed var(--primary); background: rgba(79,70,229,.09); }
.pdf-img-el { position: absolute; cursor: move; }
.pdf-img-el img { display: block; width: 100%; height: 100%; pointer-events: none; }
.pdf-img-el.selected { outline: 2px solid var(--primary); }
.pdf-img-el .rs { position: absolute; right: -7px; bottom: -7px; width: 15px; height: 15px; background: var(--primary); border: 2px solid #fff; border-radius: 50%; cursor: nwse-resize; }

/* ---------------------------------------------------------------- SEO content */
.content { max-width: 820px; }
.content h2 { border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.content ol, .content ul { margin: 0 0 1rem 1.3rem; }
.content li { margin-bottom: .45rem; }
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 4px 18px; margin-bottom: 9px; transition: border-color var(--transition), box-shadow var(--transition);
}
.faq details:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.faq details[open] { border-color: var(--accent); }
.faq summary { cursor: pointer; font-weight: 600; padding: 12px 0; color: var(--heading); }
.related-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.related-links a {
  padding: 9px 16px; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 50px; font-size: .88rem; transition: all var(--transition);
}
.related-links a:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow); }

/* ---------------------------------------------------------------- Info page header band */
.page-hero {
  position: relative; overflow: hidden;
  background: #0b1120; color: #fff; padding: 56px 0 46px;
}
.page-hero::before {
  content: ""; position: absolute; inset: -40%;
  background:
    radial-gradient(closest-side, #4F46E5, transparent) 20% 30% / 60% 70% no-repeat,
    radial-gradient(closest-side, #06B6D4, transparent) 82% 40% / 55% 70% no-repeat;
  filter: blur(40px); opacity: .55; animation: aurora 24s ease-in-out infinite alternate;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .breadcrumb, .page-hero .breadcrumb a { color: rgba(255,255,255,.72); }
.page-hero .breadcrumb a:hover { color: #fff; }
.page-hero h1 { color: #fff; margin: 0; font-size: clamp(1.8rem, 4vw, 2.5rem); }
.page-body { padding: 46px 0 54px; }

/* ---------------------------------------------------------------- Contact page */
.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; align-items: start; }
.contact-card {
  background: var(--glass); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
}
.contact-card h2 { margin-top: 0; }
.contact-side { display: flex; flex-direction: column; gap: 16px; }
.info-box {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-xs); overflow: hidden;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out);
}
.info-box:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.info-box::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad);
  transform: scaleY(0); transform-origin: top; transition: transform .35s var(--ease-out);
}
.info-box:hover::before { transform: scaleY(1); }
.info-box .info-ico {
  width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; background: var(--surface-2); margin-bottom: 11px;
  transition: transform .35s var(--ease-out);
}
.info-box:hover .info-ico { transform: scale(1.1) rotate(-6deg); }
.info-box h3 { margin: 0 0 6px; font-size: 1.05rem; }
.info-box p { margin: 0; font-size: .92rem; color: var(--muted); }

/* ---------------------------------------------------------------- Footer */
.site-footer {
  position: relative; overflow: hidden;
  background: #0b1120; color: #cbd5e1; margin-top: 56px; padding: 56px 0 24px;
}
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad);
}
.site-footer::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(700px circle at 12% 0%, rgba(79,70,229,.2), transparent 62%),
              radial-gradient(600px circle at 88% 100%, rgba(6,182,212,.15), transparent 62%);
}
.site-footer .container { position: relative; z-index: 1; }
.site-footer a { color: #94a3b8; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 30px; }
.footer-grid h4 { color: #fff; margin-bottom: 14px; font-size: .95rem; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 9px; font-size: .9rem; }
.footer-grid li a { display: inline-block; transition: transform var(--transition), color var(--transition); }
.footer-grid li a:hover { transform: translateX(5px); }
.footer-brand .brand { color: #fff; font-size: 1.32rem; display: inline-flex; margin-bottom: 14px; }
.footer-brand p { font-size: .9rem; color: #94a3b8; max-width: 320px; margin-bottom: 9px; }
.footer-tag {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent !important;
  font-weight: 700;
}
.footer-bottom { border-top: 1px solid rgba(148,163,184,.16); padding-top: 20px; text-align: center; font-size: .85rem; color: #94a3b8; }

/* ---------------------------------------------------------------- Responsive */
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
  .mega-inner { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 760px) {
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: 12px 20px;
    gap: 2px; display: none; max-height: calc(100vh - 68px); overflow-y: auto; box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; animation: popIn .3s var(--ease-out); }
  .nav-links a { padding: 13px; }
  .nav-links a::after { display: none; }
  .nav-toggle { display: block; }
  .theme-toggle { margin-left: auto; }
  .caret { display: none; }
  .mega { display: none !important; }
  .hero { padding: 62px 0 48px; }
  .hero-stats { gap: 10px; }
  .hstat { min-width: 128px; padding: 14px 16px; }
  .hstat b { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .pdf-toolbar { top: 70px; }
  h1 { font-size: 1.7rem; }
}