/* ===========================
   HerramientasPro — v3
   Inspired by: Scale AI (layout/whitespace), Superwhisper (light+amber),
                Airtable (scroll animations, stagger reveals)
   =========================== */

/* --- Variables --- */
:root {
  --bg:         #0c0c14;
  --bg2:        #13131f;
  --bg3:        #1c1c2e;
  --code-bg:    #0a0a12;
  --code-text:  #e2e8f0;
  --accent:     #818cf8;
  --accent2:    #6366f1;
  --accent-pale:rgba(129,140,248,0.1);
  --pink:       #ec4899;
  --pink-glow:  rgba(236,72,153,0.12);
  --text:       #ffffff;
  --text2:      #9ca3af;
  --text3:      #6b7280;
  --border:     rgba(255,255,255,0.07);
  --border2:    rgba(255,255,255,0.12);
  --success:    #22c55e;
  --error:      #ef4444;
  --warn:       #f59e0b;
  --radius:     12px;
  --radius-sm:  7px;
  --shadow:     0 1px 4px rgba(0,0,0,0.5);
  --shadow-md:  0 6px 32px rgba(0,0,0,0.6);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.7);
  --font:       'Inter', system-ui, -apple-system, sans-serif;
  --scroll-hero: 0px;
}

/* --- Reset --- */
*, *::before, *::after { 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: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video, iframe { max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

/* ========================
   ANIMATIONS — Rich set
   ======================== */

/* Core keyframes */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

/* Pulsing dot */
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(129,140,248,0.7); }
  70%  { box-shadow: 0 0 0 7px rgba(129,140,248,0); }
  100% { box-shadow: 0 0 0 0 rgba(129,140,248,0); }
}
.hero-badge-dot {
  animation: pulse-ring 2s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
}

/* Shimmer sweep on cards */
@keyframes shimmer {
  from { transform: translateX(-100%); }
  to   { transform: translateX(200%); }
}

/* Section divider draw */
@keyframes draw-line {
  from { width: 0; }
  to   { width: 100%; }
}

/* Floating hero glow */
@keyframes float-glow {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1);    }
  50%       { opacity: 1.0; transform: translateX(-50%) scale(1.15); }
}

/* ========================
   GEOMETRIC FLOATING SHAPES
   ======================== */
.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.shape {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.09);
  backdrop-filter: blur(2px);
  opacity: 0;
}
.shape::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 30%, rgba(255,255,255,0.18), transparent 65%);
}

/* Shape 1 — indigo, large, left */
@keyframes shape1-enter {
  from { opacity: 0; transform: translateY(-150px) rotate(-3deg); }
  to   { opacity: 1; transform: translateY(0) rotate(12deg); }
}
@keyframes shape1-float {
  0%, 100% { transform: translateY(0) rotate(12deg); }
  50%       { transform: translateY(15px) rotate(12deg); }
}
.shape-1 {
  width: 560px; height: 130px;
  left: -5%; top: 22%;
  background: linear-gradient(to right, rgba(99,102,241,0.18), transparent);
  animation:
    shape1-enter 2.4s 0.3s cubic-bezier(0.23, 0.86, 0.39, 0.96) forwards,
    shape1-float 13s 2.7s ease-in-out infinite;
}

/* Shape 2 — pink, large, right-bottom */
@keyframes shape2-enter {
  from { opacity: 0; transform: translateY(-150px) rotate(-30deg); }
  to   { opacity: 1; transform: translateY(0) rotate(-15deg); }
}
@keyframes shape2-float {
  0%, 100% { transform: translateY(0) rotate(-15deg); }
  50%       { transform: translateY(16px) rotate(-15deg); }
}
.shape-2 {
  width: 460px; height: 112px;
  right: -3%; top: 65%;
  background: linear-gradient(to right, rgba(236,72,153,0.16), transparent);
  animation:
    shape2-enter 2.4s 0.5s cubic-bezier(0.23, 0.86, 0.39, 0.96) forwards,
    shape2-float 13s 2.9s ease-in-out infinite;
}

/* Shape 3 — violet, medium, bottom-left */
@keyframes shape3-enter {
  from { opacity: 0; transform: translateY(-150px) rotate(-23deg); }
  to   { opacity: 1; transform: translateY(0) rotate(-8deg); }
}
@keyframes shape3-float {
  0%, 100% { transform: translateY(0) rotate(-8deg); }
  50%       { transform: translateY(14px) rotate(-8deg); }
}
.shape-3 {
  width: 280px; height: 75px;
  left: 8%; bottom: 10%;
  background: linear-gradient(to right, rgba(168,85,247,0.15), transparent);
  animation:
    shape3-enter 2.4s 0.4s cubic-bezier(0.23, 0.86, 0.39, 0.96) forwards,
    shape3-float 11s 2.8s ease-in-out infinite;
}

/* Shape 4 — pink, small, top-right */
@keyframes shape4-enter {
  from { opacity: 0; transform: translateY(-150px) rotate(5deg); }
  to   { opacity: 1; transform: translateY(0) rotate(20deg); }
}
@keyframes shape4-float {
  0%, 100% { transform: translateY(0) rotate(20deg); }
  50%       { transform: translateY(12px) rotate(20deg); }
}
.shape-4 {
  width: 190px; height: 55px;
  right: 18%; top: 13%;
  background: linear-gradient(to right, rgba(236,72,153,0.13), transparent);
  animation:
    shape4-enter 2.4s 0.6s cubic-bezier(0.23, 0.86, 0.39, 0.96) forwards,
    shape4-float 10s 3.0s ease-in-out infinite;
}

/* Shape 5 — indigo, tiny, top-center-left */
@keyframes shape5-enter {
  from { opacity: 0; transform: translateY(-150px) rotate(-40deg); }
  to   { opacity: 1; transform: translateY(0) rotate(-25deg); }
}
@keyframes shape5-float {
  0%, 100% { transform: translateY(0) rotate(-25deg); }
  50%       { transform: translateY(11px) rotate(-25deg); }
}
.shape-5 {
  width: 140px; height: 38px;
  left: 23%; top: 7%;
  background: linear-gradient(to right, rgba(99,102,241,0.12), transparent);
  animation:
    shape5-enter 2.4s 0.7s cubic-bezier(0.23, 0.86, 0.39, 0.96) forwards,
    shape5-float 10s 3.1s ease-in-out infinite;
}

/* Hero content sits above shapes */

/* Scroll-triggered elements */
.animate-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.animate-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.animate-scale {
  opacity: 0;
  transform: scale(0.93);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.animate-scale.visible { opacity: 1; transform: scale(1); }

.animate-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.animate-left.visible { opacity: 1; transform: translateX(0); }

/* Hero animates immediately on load */
.hero-animate {
  animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
  position: relative;
  z-index: 2;
}
.hero-animate:nth-child(1) { animation-delay: 0ms; }
.hero-animate:nth-child(2) { animation-delay: 100ms; }
.hero-animate:nth-child(3) { animation-delay: 200ms; }
.hero-animate:nth-child(4) { animation-delay: 300ms; }
.hero-animate:nth-child(5) { animation-delay: 400ms; }

/* ========================
   HEADER
   ======================== */
.site-header {
  background: rgba(12,12,20,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 1.5rem;
}
.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 60px;
}
.logo {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }
.header-nav {
  display: flex;
  gap: 1.5rem;
  flex: 1;
}
.header-nav a {
  color: var(--text2);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}
.header-nav a:hover { color: var(--text); }
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.85rem;
  gap: 0.5rem;
  min-width: 220px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.header-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245,158,11,0.12);
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  width: 100%;
  font-size: 0.875rem;
}
.header-search input::placeholder { color: var(--text3); }
.header-search svg { color: var(--text3); flex-shrink: 0; }

/* ========================
   CONTAINER
   ======================== */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========================
   AD SLOTS
   — Designed to look natural in light layout
   ======================== */
.ad-banner {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text3);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 1.5rem auto;
  width: 100%;
  max-width: 728px;
  text-align: center;
  overflow: hidden;
}
.ad-rectangle {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: min(336px, 100%);
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text3);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: center;
  overflow: hidden;
}
.ad-sidebar {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 160px;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text3);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: center;
  flex-shrink: 0;
}

/* ========================
   HERO — Superwhisper atmospheric style
   ======================== */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  /* Atmospheric gradient — dark navy → deep blue-purple → rose hints */
  background:
    radial-gradient(ellipse 80% 60% at 50% 100%, rgba(99,102,241,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 20% 60%, rgba(59,130,246,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(168,85,247,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 65% 50% at 5% 90%, rgba(236,72,153,0.11) 0%, transparent 65%),
    radial-gradient(ellipse 45% 40% at 95% 20%, rgba(236,72,153,0.07) 0%, transparent 60%),
    linear-gradient(180deg, #0c0c14 0%, #0e0e1c 100%);
}

/* Floating glow — breathes + moves on scroll */
.hero::before {
  content: '';
  position: absolute;
  top: calc(20% - var(--scroll-hero, 0px)); left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(99,102,241,0.08) 0%, transparent 70%);
  pointer-events: none;
  animation: float-glow 6s ease-in-out infinite;
}

/* Subtle grid overlay — depth effect */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.9rem;
  border-radius: 50px;
  border: 1px solid var(--border2);
  color: var(--text2);
  background: var(--bg2);
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
  box-shadow: var(--shadow);
}
.hero-badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.1rem;
  color: var(--text);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(to right, #a5b4fc, rgba(255,255,255,0.92) 48%, #fda4af);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text2);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto 2.5rem;
  line-height: 1.65;
  font-weight: 400;
}

/* Search bar — Scale AI pill style */
.hero-search {
  display: flex;
  align-items: center;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 50px;
  padding: 0.7rem 1.4rem;
  gap: 0.75rem;
  max-width: 460px;
  margin: 0 auto;
  box-shadow: var(--shadow-md);
  transition: border-color 0.2s, box-shadow 0.2s;
  position: relative;
}
.hero-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245,158,11,0.15), var(--shadow-md);
}
.hero-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  width: 100%;
  font-size: 1rem;
}
.hero-search input::placeholder { color: var(--text3); }
.hero-search svg { color: var(--text3); flex-shrink: 0; }

/* Stats strip — Superwhisper inspired */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}
.hero-stat strong {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}
.hero-stat span {
  font-size: 0.75rem;
  color: var(--text3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.hero-stats-sep {
  width: 1px;
  height: 32px;
  background: var(--border2);
}

/* ========================
   SECTION TITLES
   ======================== */
.section { padding: 2.5rem 0; }
.section-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-title::before {
  content: '';
  width: 4px;
  height: 1.1em;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ========================
   CATEGORY CARDS (2-col)
   ======================== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.category-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  display: block;
  box-shadow: var(--shadow);
  will-change: transform;
  position: relative;
}
.category-card:hover {
  border-color: rgba(236,72,153,0.4);
  box-shadow: 0 12px 40px rgba(236,72,153,0.10), var(--shadow-md);
}
.category-card .cat-icon {
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}
.category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}
.category-card p {
  color: var(--text2);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}
.category-card .cat-count {
  font-size: 0.8rem;
  color: var(--accent2);
  font-weight: 600;
}

/* ========================
   TOOL CARDS
   ======================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 0.875rem;
}
.tool-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.1rem;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  will-change: transform;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
/* Shimmer sweep on hover */
.tool-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(105deg, transparent 40%, rgba(129,140,248,0.1) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: none;
  pointer-events: none;
}
.tool-card:hover::after {
  animation: shimmer 0.55s ease forwards;
}
.tool-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(99,102,241,0.15), var(--shadow-md);
}
.tool-card .tool-icon {
  font-size: 1.5rem;
  margin-bottom: 0.1rem;
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.tool-card:hover .tool-icon { transform: scale(1.2) rotate(-5deg); }
.tool-card h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.tool-card p {
  color: var(--text2);
  font-size: 0.78rem;
  flex: 1;
  line-height: 1.5;
}
.tool-card .tool-link {
  font-size: 0.78rem;
  color: var(--accent2);
  font-weight: 600;
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  transition: gap 0.15s;
}
.tool-card:hover .tool-link { gap: 0.45rem; }

/* Tool badge */
.badge {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--accent-pale);
  color: var(--accent2);
  border: 1px solid rgba(245,158,11,0.3);
  margin-bottom: 0.15rem;
}

/* ========================
   TOOL PAGE LAYOUT
   ======================== */
.tool-page {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 2rem;
  padding: 2rem 0;
  align-items: start;
}
.tool-main { min-width: 0; }
.tool-sidebar { position: sticky; top: 80px; }

.tool-header { margin-bottom: 2rem; }
.tool-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.tool-header p {
  color: var(--text2);
  font-size: 0.95rem;
  max-width: 600px;
  line-height: 1.65;
}

.breadcrumb {
  font-size: 0.8rem;
  color: var(--text3);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.breadcrumb a { color: var(--text3); }
.breadcrumb a:hover { color: var(--text2); }

/* ========================
   TOOL BOX
   ======================== */
.tool-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.tool-box-header {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
}
.tool-box-header h2 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.tool-box-body { padding: 1.25rem; }

/* ========================
   FORM ELEMENTS
   ======================== */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 0.45rem;
}
.form-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-size: 0.95rem;
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245,158,11,0.12);
}
.form-textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  color: var(--text);
  outline: none;
  resize: vertical;
  min-height: 140px;
  font-size: 0.875rem;
  font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
  transition: border-color 0.15s;
  line-height: 1.6;
}
.form-textarea:focus { border-color: var(--accent); }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 160px; }

/* ========================
   BUTTONS
   ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  transition: all 0.15s;
  cursor: pointer;
  letter-spacing: -0.01em;
}
.btn-primary {
  background: #ffffff;
  color: #0a0a14;
  font-weight: 700;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.btn-primary:hover {
  background: #f0f0ff;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--bg);
  color: var(--text2);
  border: 1px solid var(--border2);
}
.btn-secondary:hover { color: var(--text); border-color: var(--border2); background: var(--bg3); }
.btn-success { background: var(--success); color: #fff; }
.btn-group { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1rem; }

/* ========================
   OUTPUT BOX (dark code style)
   ======================== */
.output-box {
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
  font-size: 0.875rem;
  color: var(--text);
  word-break: break-all;
  min-height: 80px;
  line-height: 1.6;
  position: relative;
}
.output-box.success { border-color: var(--success); }
.output-box.error { border-color: var(--error); color: var(--error); }

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  font-size: 0.72rem;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { border-color: var(--success); color: var(--success); }

/* ========================
   CHECKBOXES / RANGE
   ======================== */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text2);
  cursor: pointer;
}
.checkbox-item input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  cursor: pointer;
}
.range-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.range-group input[type="range"] { flex: 1; accent-color: var(--accent); }
.range-val {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent2);
  min-width: 40px;
  text-align: right;
}

/* ========================
   STAT CHIPS
   ======================== */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.stat-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
  color: var(--text2);
}
.stat-chip strong {
  display: block;
  font-size: 1.1rem;
  color: var(--accent2);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ========================
   RELATED TOOLS
   ======================== */
.related-tools {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

/* ========================
   FOOTER
   ======================== */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  margin-top: 5rem;
  padding: 2rem 1.5rem;
}
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  font-size: 0.82rem;
  color: var(--text3);
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--text2); }
.footer-copy { font-size: 0.8rem; color: var(--text3); }

/* ========================
   TOAST
   ======================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg2);
  border: 1px solid var(--success);
  color: var(--success);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transform: translateY(0.75rem);
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  box-shadow: var(--shadow-md);
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ========================
   SEARCH RESULTS
   ======================== */
#search-results {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  overflow: hidden;
  z-index: 200;
  box-shadow: var(--shadow-lg);
  display: none;
}
#search-results.visible { display: block; }
.search-result-item {
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg3); }
.search-result-item .sri-icon { font-size: 1.1rem; }
.search-result-item .sri-name { color: var(--text); font-weight: 600; }
.search-result-item .sri-cat { color: var(--text3); font-size: 0.72rem; }

/* ========================
   SEO CONTENT: HOW-TO + FAQ
   ======================== */
.seo-section { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.seo-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
}
.seo-h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}
.seo-steps {
  color: var(--text2);
  font-size: 0.875rem;
  line-height: 1.7;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.seo-steps strong { color: var(--text); }
.faq-list { display: flex; flex-direction: column; gap: 0.5rem; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-item summary {
  padding: 0.85rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  user-select: none;
  transition: background 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--bg3); }
.faq-item[open] summary { background: var(--bg3); border-bottom: 1px solid var(--border); }
.faq-item p {
  padding: 1rem;
  font-size: 0.85rem;
  color: var(--text2);
  line-height: 1.65;
  margin: 0;
}

/* ========================
   AMBIENT SCROLL ORBS
   ======================== */
.ambient-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}
.ambient-orb-purple {
  width: 700px;
  height: 700px;
  top: -200px;
  right: -200px;
  background: radial-gradient(circle, rgba(99,102,241,0.18) 0%, transparent 70%);
  filter: blur(90px);
}
.ambient-orb-pink {
  width: 600px;
  height: 600px;
  bottom: -200px;
  left: -150px;
  background: radial-gradient(circle, rgba(236,72,153,0.15) 0%, transparent 70%);
  filter: blur(90px);
}

/* Section title glow on reveal */
.section-title.visible::before {
  background: linear-gradient(135deg, var(--accent), var(--pink));
  box-shadow: 0 0 12px rgba(236,72,153,0.5);
}

/* Category card shimmer border on hover */
.category-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(129,140,248,0.25) 0%, rgba(236,72,153,0.25) 50%, rgba(99,102,241,0.15) 100%);
  opacity: 0;
  transition: opacity 0.35s;
  z-index: -1;
  pointer-events: none;
}
.category-card:hover::after { opacity: 1; }

/* Disable tilt and orbs on touch/mobile */
@media (hover: none) {
  .ambient-orb { display: none; }
}

/* ========================
   RESPONSIVE — TABLET (≤768px)
   ======================== */
@media (max-width: 768px) {
  /* Container */
  .container { padding: 0 1rem; }

  /* Header */
  .header-inner { gap: 0.75rem; padding: 0; }
  .header-nav { display: none; }
  .header-search { min-width: 0; flex: 1; }
  .site-header { padding: 0 1rem; }

  /* Hero */
  .hero { padding: 3rem 0 2rem; }
  .hero-search { max-width: 100%; }
  .hero-stats { gap: 1rem; margin-top: 1.75rem; }
  .hero-stats-sep { display: none; }

  /* Hero shapes — shrink, remove GPU-expensive effects on mobile */
  .shape-1 { width: 260px; height: 64px; left: -8%; }
  .shape-2 { width: 220px; height: 56px; right: -6%; }
  .shape-3, .shape-4, .shape-5 { display: none; }
  .shape { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .ambient-orb { display: none; }

  /* Remove will-change on mobile — saves memory */
  .tool-card, .category-card { will-change: auto; }

  /* Simpler header blur on mobile */
  .site-header { backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }

  /* Sections */
  .section { padding: 2rem 0; }
  .categories-grid { grid-template-columns: 1fr; }

  /* Tool page */
  .tool-page { grid-template-columns: 1fr; padding: 1.25rem 0; }
  .tool-sidebar { display: none; }
  .tool-header { margin-bottom: 1.25rem; }
  .tool-box-body { padding: 1rem; }

  /* Ad slots — flexible height, no overflow */
  .ad-banner {
    height: auto;
    min-height: 60px;
    max-width: 100%;
    padding: 1rem 0.5rem;
  }
  .ad-rectangle {
    height: auto;
    min-height: 180px;
    padding: 1rem;
  }
  .ad-sidebar { display: none; }

  /* SEO section */
  .seo-card { padding: 1.25rem; }

  /* Footer */
  .footer-inner { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
}

/* ========================
   RESPONSIVE — MOBILE (≤480px)
   ======================== */
@media (max-width: 480px) {
  /* Container */
  .container { padding: 0 0.875rem; }

  /* Hero */
  .hero { padding: 2.5rem 0 1.75rem; }
  .hero h1 { font-size: clamp(1.75rem, 8vw, 2.25rem); }
  .hero p { font-size: 0.95rem; }
  .hero-stat strong { font-size: 1.2rem; }
  .hero-stat span { font-size: 0.7rem; }
  .hero-stats { gap: 0.875rem; }
  .hero-search { padding: 0.6rem 0.875rem; }

  /* Tool cards: 2 columns */
  .tools-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.625rem;
  }
  .tool-card { padding: 1rem 0.875rem; }

  /* Tool page */
  .tool-page { padding: 1rem 0; }
  .tool-header h1 { font-size: 1.4rem; }
  .tool-header { margin-bottom: 1rem; }
  .tool-box-body { padding: 0.875rem; }
  .tool-box-header { padding: 0.75rem 1rem; }

  /* Buttons */
  .btn-group { flex-direction: column; gap: 0.5rem; }
  .btn-group .btn { width: 100%; justify-content: center; }

  /* Forms */
  .form-row { flex-direction: column; gap: 0; }

  /* Output box */
  .output-box { font-size: 0.82rem; padding: 0.875rem; }

  /* SEO section */
  .seo-card { padding: 1rem; }
  .seo-steps { font-size: 0.82rem; }
  .faq-item summary { font-size: 0.82rem; padding: 0.75rem 0.875rem; }
  .faq-item p { font-size: 0.8rem; padding: 0.875rem; }

  /* Ad banner → compact */
  .ad-banner { min-height: 50px; margin: 1rem auto; }

  /* Section */
  .section { padding: 1.5rem 0; }

  /* Section title */
  .section-title { font-size: 0.85rem; }

  /* Breadcrumb */
  .breadcrumb { font-size: 0.75rem; }

  /* Related tools grid */
  .related-tools .tools-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================
   RESPONSIVE — SMALL PHONE (≤360px)
   ======================== */
@media (max-width: 360px) {
  .hero h1 { font-size: 1.6rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .tool-card { padding: 0.875rem; }
  .hero-stats { flex-wrap: wrap; justify-content: center; gap: 0.75rem; }
  .btn-group .btn { font-size: 0.82rem; padding: 0.55rem 1rem; }
}