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

:root {
  --ink:      #1a1a1a;
  --soft:     #555555;
  --muted:    #999999;
  --rule:     #e0e0e0;
  --bg:       #f5f5f5;
  --card-bg:  #ffffff;
  --accent:   #f0a500;
  --sans:     'Helvetica Neue', Arial, sans-serif;
}

html {
  font-size: 17px;
  background: var(--bg);
  color: var(--ink);
}

body {
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── Layout ────────────────────────────────────────────── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Header ────────────────────────────────────────────── */
.site-header {
  background: var(--ink);
  color: #fff;
  padding: 2.25rem 1.5rem 2rem;
}

.site-title {
  font-size: clamp(1.8rem, 6vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.site-title span {
  color: var(--accent);
}

.tagline {
  font-size: 0.9rem;
  color: #aaaaaa;
}

/* ─── Tip Grid ──────────────────────────────────────────── */
.tip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 2.5rem 0 3rem;
}

/* ─── Tip Card ──────────────────────────────────────────── */
.tip-card {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.4rem 1.5rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.tip-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.09);
  transform: translateY(-2px);
}

.tip-tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.tip-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.tip-excerpt {
  font-size: 0.88rem;
  color: var(--soft);
  line-height: 1.5;
  flex: 1;
}

.tip-meta {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

/* ─── Tip Page ──────────────────────────────────────────── */
.tip-page {
  padding: 2.5rem 0 4rem;
}

.back-link {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 1.75rem;
}

.back-link:hover {
  color: var(--ink);
}

.tip-header {
  margin-bottom: 2rem;
}

.tip-header .tip-tag {
  display: block;
  margin-bottom: 0.6rem;
}

.tip-header h1 {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.tip-header .tip-meta {
  font-size: 0.78rem;
}

.tip-header hr {
  border: none;
  border-top: 2px solid var(--ink);
  margin-top: 1.25rem;
}

.tip-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
}

.tip-body p {
  margin-bottom: 1.25rem;
}

.tip-body h2 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 2rem 0 0.75rem;
  color: var(--soft);
}

.tip-body ol,
.tip-body ul {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.tip-body li {
  margin-bottom: 0.5rem;
}

.tip-body .callout {
  background: #fffbf0;
  border-left: 3px solid var(--accent);
  padding: 0.85rem 1.25rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.92rem;
  color: var(--soft);
  margin: 1.5rem 0;
}

/* ─── Footer ────────────────────────────────────────────── */
.site-footer {
  padding: 1.5rem 0 2rem;
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--rule);
}

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 480px) {
  html { font-size: 16px; }
  .tip-grid { grid-template-columns: 1fr; }
}