/* ============================================================
   ToolHub — Main Stylesheet
   Edit CSS variables below to change the entire site theme
   ============================================================ */

/* ── DESIGN TOKENS ── */
:root {
  /* Brand Colors — edit these to retheme the whole site */
  --clr-primary:      #2563eb;
  --clr-primary-dark: #1d4ed8;
  --clr-primary-light:#eff6ff;
  --clr-accent:       #06b6d4;

  /* Neutrals */
  --clr-bg:           #f8fafc;
  --clr-surface:      #ffffff;
  --clr-border:       #e2e8f0;
  --clr-text:         #0f172a;
  --clr-muted:        #64748b;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.12);
  --shadow-card:0 2px 8px rgba(37,99,235,.07);

  /* Typography */
  --font-display: 'Plus Jakarta Sans', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Spacing & Radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-pill:999px;

  /* Transitions */
  --ease-out: cubic-bezier(.22,.68,0,1.2);
  --transition: .22s var(--ease-out);
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── UTILITY CLASSES ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-primary);
  background: var(--clr-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--clr-text);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--clr-muted);
  max-width: 520px;
}

.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}
.btn-primary:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,.4);
}
.btn-outline {
  background: transparent;
  color: var(--clr-primary);
  border: 2px solid var(--clr-primary);
}
.btn-outline:hover {
  background: var(--clr-primary-light);
  transform: translateY(-2px);
}
.btn-ghost {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 2px solid rgba(255,255,255,.3);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.25);
  transform: translateY(-2px);
}

/* ── NAVBAR ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  height: 66px;
  display: flex;
  align-items: center;
  transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: var(--shadow-md); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo — edit text inside HTML */
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo span {
  color: var(--clr-primary);
}
.nav-logo-icon {
  width: 34px; height: 34px;
  background: var(--clr-primary);
  border-radius: 9px;
  display: grid;
  place-items: center;
}
.nav-logo-icon svg { color: #fff; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  font-size: .95rem;
  font-weight: 500;
  color: var(--clr-muted);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--clr-primary);
  background: var(--clr-primary-light);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: 66px 0 0 0;
    background: var(--clr-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform .3s var(--ease-out);
    border-top: 1px solid var(--clr-border);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a {
    font-size: 1.05rem;
    padding: 14px 16px;
  }
}

/* ── HERO ── */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #0e7490 100%);
  padding: 100px 0 120px;
  text-align: center;
}
/* Decorative grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
/* Glow blobs */
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .35;
  pointer-events: none;
}
.hero-blob-1 {
  width: 520px; height: 520px;
  background: var(--clr-primary);
  top: -150px; left: -100px;
}
.hero-blob-2 {
  width: 400px; height: 400px;
  background: var(--clr-accent);
  bottom: -100px; right: -80px;
}

.hero-content { position: relative; z-index: 1; }

/* Hero badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  color: #e2e8f0;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero-badge-dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .6; transform: scale(1.4); }
}

/* Hero heading — edit in HTML */
.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero-heading em {
  font-style: normal;
  background: linear-gradient(90deg, #60a5fa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hero subheading — edit in HTML */
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.72);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Hero stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; color: #fff; }
.hero-stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}
.hero-stat-num span { color: #60a5fa; }
.hero-stat-label { font-size: .8rem; color: rgba(255,255,255,.55); margin-top: 4px; letter-spacing: .06em; text-transform: uppercase; }

/* ── SECTION WRAPPER ── */
.section { padding: 96px 0; }
.section-header { margin-bottom: 56px; }

/* ── TOOLS GRID ── */
/* Grid — 4 cols desktop, 3 tablet, 2 mobile, 1 small */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1100px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px)  { .tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .tools-grid { grid-template-columns: 1fr; } }

/* Tool Card */
.tool-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 24px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary);
}
.tool-card:hover::before { transform: scaleX(1); }

.tool-icon {
  width: 46px; height: 46px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  /* Each category gets its own color via data-category */
}
/* Icon color variants — add more as needed */
.tool-icon.pdf    { background: #fef2f2; color: #ef4444; }
.tool-icon.image  { background: #f0fdf4; color: #22c55e; }
.tool-icon.text   { background: #eff6ff; color: #3b82f6; }
.tool-icon.calc   { background: #fdf4ff; color: #a855f7; }
.tool-icon.file   { background: #fff7ed; color: #f97316; }
.tool-icon.convert{ background: #ecfeff; color: #06b6d4; }
.tool-icon.code   { background: #f0fdf4; color: #16a34a; }
.tool-icon.misc   { background: #f8fafc; color: #64748b; }

.tool-name {
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.3;
}
.tool-desc {
  font-size: .82rem;
  color: var(--clr-muted);
  line-height: 1.55;
}
.tool-arrow {
  margin-top: auto;
  font-size: .8rem;
  color: var(--clr-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transform: translateX(-4px);
  transition: var(--transition);
}
.tool-card:hover .tool-arrow { opacity: 1; transform: translateX(0); }

/* ── CATEGORY TABS (tools page) ── */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.cat-tab {
  font-size: .875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-muted);
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}
.cat-tab:hover { border-color: var(--clr-primary); color: var(--clr-primary); }
.cat-tab.active {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
}

/* ── FEATURES SECTION ── */
.features { background: var(--clr-surface); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 768px) { .features-grid { grid-template-columns: 1fr; } }

.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.feature-icon {
  width: 52px; height: 52px;
  background: var(--clr-primary-light);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.feature-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-desc { font-size: .9rem; color: var(--clr-muted); line-height: 1.6; }

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  background: linear-gradient(135deg, #1e3a8a, #0e7490);
  padding: 64px 0;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.page-hero-content { position: relative; }
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.page-hero p { color: rgba(255,255,255,.72); font-size: 1.05rem; }

/* ── ABOUT PAGE ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 768px) { .about-grid { grid-template-columns: 1fr; gap: 40px; } }

.about-visual {
  background: linear-gradient(135deg, var(--clr-primary-light), #ecfeff);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-stat-card {
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.about-stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--clr-primary);
}
.about-stat-label { font-size: .8rem; color: var(--clr-muted); margin-top: 4px; }

.about-body p { color: var(--clr-muted); margin-bottom: 20px; line-height: 1.75; font-size: 1rem; }

.team-values { display: flex; flex-direction: column; gap: 12px; margin-top: 32px; }
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--clr-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
}
.value-icon { font-size: 1.2rem; flex-shrink: 0; }
.value-text strong { font-weight: 700; font-size: .9rem; display: block; }
.value-text span { font-size: .82rem; color: var(--clr-muted); }

/* ── SEARCH BAR (tools page) ── */
.search-wrap {
  position: relative;
  max-width: 480px;
  margin-bottom: 36px;
}
.search-wrap input {
  width: 100%;
  padding: 12px 20px 12px 46px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--clr-text);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.search-wrap input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,.1);
}
.search-icon {
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--clr-muted);
  pointer-events: none;
}

/* ── FOOTER ── */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,.65);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .nav-logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: .875rem; line-height: 1.7; max-width: 260px; }

.footer-col h4 {
  font-family: var(--font-display);
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  padding: 4px 0;
  transition: color .2s;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .82rem;
}
.footer-bottom a { color: rgba(255,255,255,.55); transition: color .2s; }
.footer-bottom a:hover { color: #fff; }

/* ── TOOL INNER PAGE ── */
.tool-workspace {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 32px;
}
.dropzone {
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius-md);
  padding: 60px 40px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--clr-primary);
  background: var(--clr-primary-light);
}
.dropzone-icon { font-size: 3rem; margin-bottom: 12px; }
.dropzone p { color: var(--clr-muted); font-size: .9rem; }
.dropzone strong { color: var(--clr-primary); }

/* ── SCROLL ANIMATIONS ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger children */
.stagger > * { transition-delay: calc(var(--i, 0) * .07s); }

/* ── BREADCRUMB ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  color: var(--clr-muted);
  margin-bottom: 8px;
}
.breadcrumb a { color: var(--clr-primary); }
.breadcrumb span { color: var(--clr-border); }

/* ── BACK TO TOP ── */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--clr-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(12px);
  transition: var(--transition);
  z-index: 999;
}
#back-to-top.visible { opacity: 1; transform: translateY(0); }
#back-to-top:hover { background: var(--clr-primary-dark); transform: translateY(-2px); }

/* ── RESPONSIVE MISC ── */
@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .hero { padding: 72px 0 88px; }
  .hero-stats { gap: 28px; }
  .hero-stat-num { font-size: 1.5rem; }
}