/* ==========================================================================
   RealToolHub — Core Stylesheet
   Design language: "The Workbench" — a light, precise toolboard.
   Pegboard dot-grid texture, teal "signal" accent, mono catalog tags.
   This file holds design tokens + global/shared components (nav, footer,
   buttons, cards, homepage). Individual tool pages layer tool.css on top.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root{
  /* Light theme (default) */
  --bg: #eef2f4;
  --bg-pattern: rgba(22, 32, 43, 0.06);
  --surface: #ffffff;
  --surface-2: #f7f9fa;
  --ink: #16202b;
  --ink-soft: #55636f;
  --ink-faint: #8996a1;
  --border: #dbe1e6;
  --border-strong: #c3cbd2;

  --accent: #0f9c8d;
  --accent-ink: #063b34;
  --accent-soft: #e1f4f1;
  --accent-strong: #0b7d71;
  --accent-gradient: linear-gradient(135deg, #0f9c8d 0%, #14b8a6 45%, #2dd4c8 100%);
  --glow: 0 0 0 rgba(15, 156, 141, 0);

  --amber: #de9a2e;
  --amber-soft: #fbf0dc;
  --danger: #d9503d;
  --danger-soft: #fbe6e2;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 32, 0.06);
  --shadow-md: 0 8px 24px -8px rgba(16, 24, 32, 0.18);
  --shadow-lg: 0 20px 48px -16px rgba(16, 24, 32, 0.28);
  --shadow-glow: 0 12px 32px -10px rgba(15, 156, 141, 0.35);

  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  --nav-h: 68px;
  --container: 1180px;

  color-scheme: light;
}

html[data-theme="dark"]{
  --bg: #0e1520;
  --bg-pattern: rgba(255, 255, 255, 0.055);
  --surface: #161f2c;
  --surface-2: #1b2531;
  --ink: #e9eef2;
  --ink-soft: #a7b3bd;
  --ink-faint: #71808c;
  --border: #2a3542;
  --border-strong: #384556;

  --accent: #2bd6c3;
  --accent-ink: #d6fbf5;
  --accent-soft: #12332f;
  --accent-strong: #45e6d3;
  --accent-gradient: linear-gradient(135deg, #0d9488 0%, #2bd6c3 50%, #5eead4 100%);

  --amber: #f0b34d;
  --amber-soft: #33290f;
  --danger: #ef7360;
  --danger-soft: #3a1c17;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px -8px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 20px 48px -16px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 12px 36px -8px rgba(43, 214, 195, 0.4);

  color-scheme: dark;
}

/* ---------- Reset ---------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4{ font-family: var(--font-display); margin: 0 0 .5em; letter-spacing: -0.01em; }
p{ margin: 0 0 1em; color: var(--ink-soft); }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* Visible keyboard focus everywhere */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container{ max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Pegboard dot-grid texture, used behind hero + section backdrops */
.pegboard{
  background-image: radial-gradient(var(--bg-pattern) 1.4px, transparent 1.4px);
  background-size: 22px 22px;
}

/* ---------- Mono "catalog tag" ---------- */
.tag-id{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 3px 9px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn{
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  overflow: hidden;
  transition: transform .25s var(--ease-smooth), box-shadow .25s var(--ease-smooth), background-color .2s ease, border-color .2s ease;
}
.btn:active{ transform: translateY(1px) scale(0.98); }
.btn-primary{
  background: var(--accent-gradient);
  background-size: 160% 160%;
  background-position: 0% 50%;
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease-smooth), box-shadow .25s var(--ease-smooth), background-position .5s ease;
}
.btn-primary:hover{
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
  background-position: 100% 50%;
}
.btn-ghost{ background: transparent; border-color: var(--border-strong); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent-strong); transform: translateY(-1px); }
.btn-block{ width: 100%; }
.btn-sm{ padding: 8px 14px; font-size: 13px; }
.btn:disabled{ opacity: .5; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ---------- Navigation ---------- */
.site-nav{
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s var(--ease-smooth), background-color .3s ease;
}
.site-nav.scrolled{ box-shadow: 0 4px 20px -8px rgba(16, 24, 32, 0.12); }
html[data-theme="dark"] .site-nav.scrolled{ box-shadow: 0 4px 20px -8px rgba(0, 0, 0, 0.4); }
.site-nav .container{ display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand{ display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 19px; }
.brand-mark{
  width: 32px; height: 32px; border-radius: 9px;
  overflow: hidden;
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: transform .3s var(--ease-snap);
}
.brand:hover .brand-mark{ transform: rotate(-8deg) scale(1.06); }
.brand-mark img{ width: 100%; height: 100%; object-fit: cover; display: block; }

.nav-links{ display: flex; align-items: center; gap: 4px; }
.nav-links a{
  padding: 9px 14px; border-radius: var(--radius-sm); font-weight: 500; font-size: 14.5px; color: var(--ink-soft);
  transition: background-color .15s ease, color .15s ease;
}
.nav-links a:hover, .nav-links a.active{ background: var(--surface-2); color: var(--ink); }

.nav-actions{ display: flex; align-items: center; gap: 8px; }

.theme-toggle{
  width: 40px; height: 40px; border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  display: grid; place-items: center;
  cursor: pointer;
  color: var(--ink);
  transition: border-color .2s ease, transform .4s var(--ease-snap);
}
.theme-toggle:hover{ border-color: var(--accent); transform: rotate(12deg); }
.theme-toggle svg{ width: 18px; height: 18px; transition: transform .4s var(--ease-smooth); }
.theme-toggle .sun{ display: none; }
html[data-theme="dark"] .theme-toggle .moon{ display: none; }
html[data-theme="dark"] .theme-toggle .sun{ display: block; }

.nav-burger{
  display: none;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); background: var(--surface);
  cursor: pointer; place-items: center;
}
.nav-burger svg{ width: 20px; height: 20px; }

/* Mobile nav */
@media (max-width: 860px){
  .nav-links{
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch;
    padding: 10px 16px 18px;
    gap: 2px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform .2s ease, opacity .2s ease;
  }
  .nav-links.open{ transform: translateY(0); opacity: 1; pointer-events: auto; box-shadow: var(--shadow-md); }
  .nav-links a{ padding: 12px 10px; }
  .nav-burger{ display: grid; }
}

/* ---------- Hero / search ---------- */
.hero{ position: relative; padding: 64px 0 40px; text-align: center; overflow: hidden; }

/* Soft animated glow orbs behind the hero content — layered under the
   pegboard dot texture for depth without being distracting. */
.hero::before, .hero::after{
  content: "";
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  z-index: 0;
  animation: heroFloat 14s ease-in-out infinite;
  pointer-events: none;
}
.hero::before{
  background: var(--accent);
  top: -180px; left: 8%;
}
.hero::after{
  background: #5eead4;
  top: -120px; right: 8%;
  animation-delay: -7s;
  opacity: 0.22;
}
html[data-theme="dark"] .hero::before,
html[data-theme="dark"] .hero::after{ opacity: 0.18; }

@keyframes heroFloat{
  0%, 100%{ transform: translate(0, 0) scale(1); }
  50%{ transform: translate(20px, 30px) scale(1.08); }
}

.hero .container{ position: relative; z-index: 1; }
.hero h1{
  font-size: clamp(32px, 5vw, 48px);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .lede{ max-width: 560px; margin: 0 auto 30px; font-size: 17px; }

.search-shell{
  max-width: 640px; margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 8px;
  display: flex; align-items: center; gap: 8px;
  transition: box-shadow .3s var(--ease-smooth), border-color .3s ease;
}
.search-shell:focus-within{
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}
.search-shell svg{ width: 20px; height: 20px; margin-left: 10px; color: var(--ink-faint); flex-shrink: 0; }
.search-shell input{
  flex: 1; border: none; outline: none; background: transparent;
  font-size: 16px; padding: 12px 4px; color: var(--ink); font-family: var(--font-body);
}
.search-shell input::placeholder{ color: var(--ink-faint); }
.search-count{
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint);
  padding-right: 10px; white-space: nowrap;
}

/* Category chips */
.category-row{
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
  margin: 26px auto 0; max-width: 780px;
}
.chip{
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink-soft);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13.5px; font-weight: 600;
  cursor: pointer;
  transition: all .25s var(--ease-smooth);
}
.chip:hover{ border-color: var(--accent); color: var(--accent-strong); transform: translateY(-1px); }
.chip.active{ background: var(--ink); color: var(--bg); border-color: var(--ink); transform: scale(1.04); }
html[data-theme="dark"] .chip.active{ background: var(--accent-gradient); color: var(--accent-ink); border-color: var(--accent); }

/* ---------- Tool grid ---------- */
.tools-section{ padding: 46px 0 90px; }
.section-head{ display:flex; align-items: baseline; justify-content: space-between; margin-bottom: 22px; flex-wrap: wrap; gap: 10px; }
.section-head h2{ font-size: 22px; }
.section-head .count{ font-family: var(--font-mono); font-size: 13px; color: var(--ink-faint); }

.tool-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}

.tool-card{
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex; flex-direction: column; gap: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .35s var(--ease-smooth), box-shadow .35s var(--ease-smooth), border-color .35s ease;
}
.tool-card::before{
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease-smooth);
}
.tool-card:hover{
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: transparent;
}
.tool-card:hover::before{ transform: scaleX(1); }

.tool-card-top{ display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.tool-icon{
  width: 42px; height: 42px; border-radius: 11px;
  background: var(--accent-soft); color: var(--accent-strong);
  display: grid; place-items: center; flex-shrink: 0;
  transition: transform .35s var(--ease-snap), background-color .3s ease, color .3s ease;
}
.tool-card:hover .tool-icon{
  background: var(--accent-gradient); color: #fff;
  transform: scale(1.08) rotate(-4deg);
}
.tool-icon svg{ width: 22px; height: 22px; }

/* the "power dot" signature: lights up on hover, like a tool switching on */
.power-dot{
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--border-strong);
  margin-top: 4px;
  transition: background-color .2s ease, box-shadow .2s ease;
}
.tool-card:hover .power-dot{
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.tool-card h3{ font-size: 16.5px; margin: 0; }
.tool-card p{ font-size: 13.5px; margin: 0; flex: 1; }
.tool-card .card-foot{ display: flex; align-items: center; justify-content: space-between; margin-top: 4px; }
.tool-card .open-link{
  font-size: 13px; font-weight: 700; color: var(--accent-strong);
  display: inline-flex; align-items: center; gap: 4px;
}
.tool-card .open-link svg{ width: 14px; height: 14px; transition: transform .15s ease; }
.tool-card:hover .open-link svg{ transform: translateX(3px); }

.empty-state{
  text-align: center; padding: 60px 20px; color: var(--ink-faint);
  border: 1px dashed var(--border-strong); border-radius: var(--radius-md);
  grid-column: 1 / -1;
}

/* ---------- Footer ---------- */
.site-footer{ border-top: 1px solid var(--border); padding: 42px 0 30px; margin-top: 40px; }
.footer-grid{ display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 26px; }
.footer-brand p{ font-size: 13.5px; max-width: 280px; }
.footer-col h4{ font-size: 13px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-faint); margin-bottom: 12px; }
.footer-col ul{ display: flex; flex-direction: column; gap: 9px; }
.footer-col a{ font-size: 14px; color: var(--ink-soft); }
.footer-col a:hover{ color: var(--accent-strong); }
.footer-bottom{
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border); padding-top: 18px;
  font-size: 12.5px; color: var(--ink-faint); flex-wrap: wrap; gap: 8px;
}
@media (max-width: 720px){
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .footer-brand{ grid-column: 1 / -1; }
}

/* ---------- Fade-up entrance animation for cards ---------- */
@keyframes fadeUp{
  from{ opacity: 0; transform: translateY(14px); }
  to{ opacity: 1; transform: translateY(0); }
}
.tool-card{ animation: fadeUp .5s var(--ease-smooth) both; }

/* Skip link for accessibility */
.skip-link{
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 200;
}
.skip-link:focus{ left: 0; }