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

:root {
  --black:   #0a0a0a;
  --white:   #fafafa;
  --gray-100:#f2f2f0;
  --gray-200:#e4e4e0;
  --gray-400:#9a9a94;
  --gray-600:#5a5a54;
  --accent:  #0a0a0a;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-serif:'DM Serif Display', Georgia, serif;
  --grid: 1fr 1fr 1fr;
  --gap: 1px;
  --page-pad: clamp(1.5rem, 4vw, 3rem);
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--black);
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Layout ───────────────────────────────────────────────────── */
.site-wrapper { min-height: 100vh; display: flex; flex-direction: column; }
.container { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 var(--page-pad); }

/* ── Header ───────────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--black);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 100;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}
.site-logo {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.site-nav { display: flex; gap: 2rem; align-items: center; }
.site-nav a {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-600);
  transition: color 0.15s;
}
.site-nav a:hover { color: var(--black); }
.btn-register {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--black);
  padding: 0.35rem 0.9rem;
  transition: background 0.15s, color 0.15s;
}
.btn-register:hover { background: var(--black); color: var(--white); }

/* ── Hero / Intro ─────────────────────────────────────────────── */
.site-hero {
  border-bottom: 1px solid var(--black);
  padding: 4rem 0 3rem;
}
.site-hero__headline {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 20ch;
}
.site-hero__sub {
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  max-width: 46ch;
  line-height: 1.65;
}

/* ── Filter Bar ───────────────────────────────────────────────── */
.filter-bar {
  border-bottom: 1px solid var(--black);
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter-bar__inner {
  display: flex;
  gap: 0;
  white-space: nowrap;
}
.filter-btn {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1.25rem;
  border: none;
  border-right: 1px solid var(--black);
  background: transparent;
  cursor: pointer;
  color: var(--gray-600);
  transition: background 0.12s, color 0.12s;
}
.filter-btn:first-child { border-left: none; }
.filter-btn:hover,
.filter-btn.is-active {
  background: var(--black);
  color: var(--white);
}

/* ── Tools Grid ───────────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: var(--grid);
  gap: var(--gap);
  background: var(--black);
  border-bottom: 1px solid var(--black);
}
@media (max-width: 900px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ── Tool Card ────────────────────────────────────────────────── */
.tool-card {
  background: var(--white);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  transition: background 0.15s;
}
.tool-card:hover { background: var(--gray-100); }
.tool-card--sponsored { background: #f7f5f0; }
.tool-card--sponsored::before {
  content: 'Sponsored';
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.tool-card__logo {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  border: 1px solid var(--gray-200);
}
.tool-card__logo--placeholder {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--gray-400);
  text-transform: uppercase;
}

.tool-card__name {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.2;
}
.tool-card__tagline {
  font-size: 0.8rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.tool-card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-200);
  flex-wrap: wrap;
}
.tool-card__category {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.tool-card__badge {
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--gray-200);
  padding: 0.15rem 0.45rem;
  color: var(--gray-600);
}
.tool-card__actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-left: auto;
}
.btn-upvote {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  border: 1px solid var(--gray-200);
  padding: 0.3rem 0.65rem;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}
.btn-upvote:hover { border-color: var(--black); }
.btn-upvote.is-voted { background: var(--black); color: var(--white); border-color: var(--black); }
.btn-visit {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  border: 1px solid var(--black);
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  background: transparent;
  transition: background 0.12s, color 0.12s;
}
.btn-visit:hover { background: var(--black); color: var(--white); }

/* ── Single Tool ──────────────────────────────────────────────── */
.single-tool { padding: 4rem 0; }
.single-tool__header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: start;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--black);
  margin-bottom: 2rem;
}
.single-tool__logo {
  width: 5rem;
  height: 5rem;
  object-fit: contain;
  border: 1px solid var(--gray-200);
}
.single-tool__name {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
}
.single-tool__tagline {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: var(--gray-600);
}
.single-tool__body { max-width: 65ch; line-height: 1.75; font-size: 0.9375rem; }

/* ── Footer ───────────────────────────────────────────────────── */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--black);
  padding: 1.5rem 0;
}
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* ── No results ───────────────────────────────────────────────── */
.no-tools {
  padding: 5rem var(--page-pad);
  font-size: 0.875rem;
  color: var(--gray-400);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}