:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #e0e7ff;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --shadow-glow: 0 0 40px rgba(99,102,241,.15);
  --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --gradient-2: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.header {
  background: rgba(255,255,255,.85);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
}

.logo-icon {
  font-size: 1.6rem;
  filter: drop-shadow(0 2px 4px rgba(99,102,241,.3));
  animation: spin-slow 8s linear infinite;
}
@keyframes spin-slow { from{transform:rotate(0)} to{transform:rotate(360deg)} }

.logo-text strong {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: .95rem;
  transition: all .2s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-1);
  border-radius: 2px;
  transition: width .3s;
}
.nav-link:hover { color: var(--primary); }
.nav-link:hover::after { width: 100%; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 80px 20px 64px;
  background: var(--gradient-1);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(255,255,255,.05) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translate(0,0) rotate(0deg); }
  33% { transform: translate(30px,-30px) rotate(120deg); }
  66% { transform: translate(-20px,20px) rotate(240deg); }
}

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

.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -.03em;
  text-shadow: 0 4px 30px rgba(0,0,0,.15);
  animation: fadeUp .6s ease-out;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-sub {
  font-size: 1.25rem;
  opacity: .95;
  margin-bottom: 36px;
  font-weight: 400;
  animation: fadeUp .6s ease-out .15s backwards;
}

.hero-search {
  max-width: 440px;
  margin: 0 auto;
  animation: fadeUp .6s ease-out .3s backwards;
}

.hero-search input {
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: 50px;
  font-size: 1.05rem;
  outline: none;
  box-shadow: 0 8px 30px rgba(0,0,0,.2);
  background: rgba(255,255,255,.95);
  transition: box-shadow .3s;
}

.hero-search input:focus {
  box-shadow: 0 8px 40px rgba(0,0,0,.3), 0 0 0 4px rgba(255,255,255,.3);
}

/* Hero badges */
.hero-badges {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
  animation: fadeUp .6s ease-out .45s backwards;
}
.hero-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  background: rgba(255,255,255,.15);
  padding: 6px 16px;
  border-radius: 50px;
  backdrop-filter: blur(10px);
}
.hero-badge span { font-size: 1.1rem; }

/* ===== Tools Grid ===== */
.tools-section {
  padding: 64px 0;
  position: relative;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 32px;
  letter-spacing: -.02em;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 40px;
  height: 4px;
  background: var(--gradient-1);
  border-radius: 4px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: var(--text);
  transition: all .35s cubic-bezier(.4,0,.2,1);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: transparent;
}

.tool-card:hover::before { transform: scaleX(1); }

.tool-icon {
  font-size: 2.2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: 16px;
  transition: transform .35s;
}
.tool-card:hover .tool-icon { transform: scale(1.1) rotate(-5deg); }

.tool-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.tool-desc {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== About ===== */
.about {
  padding: 56px 0;
  background: var(--card);
  border-top: 1px solid var(--border);
}

.about h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -.02em;
}

.about p {
  color: var(--text-muted);
  max-width: 600px;
}

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: .9rem;
  border-top: 1px solid var(--border);
  background: var(--card);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .85rem;
  transition: color .2s;
}
.footer-links a:hover { color: var(--primary); }

/* ===== Tool Page Layout ===== */
.tool-page {
  padding: 48px 0 64px;
}

.tool-page .back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: .9rem;
  margin-bottom: 24px;
  transition: all .2s;
  font-weight: 500;
}

.tool-page .back-link:hover { color: var(--primary); gap: 10px; }

.tool-page h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -.02em;
}

.tool-page .tool-desc-top {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.calculator-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow), var(--shadow-glow);
  max-width: 640px;
  position: relative;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 8px;
  color: var(--text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: all .25s;
  background: var(--bg);
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
  background: #fff;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.btn-calc {
  background: var(--gradient-1);
  color: #fff;
  border: none;
  padding: 16px 32px;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all .3s;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.btn-calc::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  transition: left .5s;
}
.btn-calc:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99,102,241,.35);
}
.btn-calc:hover::before { left: 100%; }
.btn-calc:active { transform: translateY(0); }

.result-area {
  margin-top: 32px;
  padding: 28px;
  background: var(--bg);
  border-radius: 14px;
  border: 1px solid var(--border);
  display: none;
  animation: slideDown .4s ease-out;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-area.show { display: block; }

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.result-row:last-child { border-bottom: none; }

.result-label {
  font-weight: 500;
  color: var(--text-muted);
  font-size: .95rem;
}

.result-value {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

.result-highlight {
  background: var(--gradient-1);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 14px 0;
  box-shadow: 0 4px 20px rgba(99,102,241,.2);
}

.result-highlight .result-label { color: rgba(255,255,255,.85); }
.result-highlight .result-value { font-size: 1.5rem; color: #fff; }

/* Shrink Netlify badge */
div[aria-label="Netlify badge"],
a[aria-label="Netlify badge"],
.netlify-badge,
#netlify-badge,
img[alt*="Netlify"],
svg[aria-label*="Netlify"] {
  transform: scale(0.15) !important;
  transform-origin: bottom right !important;
  opacity: 0.2 !important;
  max-height: 8px !important;
  max-width: 40px !important;
  overflow: hidden !important;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.1rem; }
  .hero-sub { font-size: 1.05rem; }
  .nav { display: none; }
  .menu-toggle { display: block; }
  body.nav-open .nav {
    display: flex;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--card);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }
  .form-row { grid-template-columns: 1fr; }
  .calculator-card { padding: 24px; }
  .tool-page h1 { font-size: 1.7rem; }
  .hero-badges { gap: 12px; }
  .hero-badge { font-size: .75rem; padding: 5px 12px; }
}