/* Apple-inspired portfolio
   - Clean whitespace, crisp type, soft gradients & subtle shadows
   - System fonts: San Francisco/Helvetica/Arial fallbacks
*/
:root {
  --bg: #ffffff;
  --text: #0a0a0a;
  --muted: #5f6368;
  --card: #ffffff;
  --border: #e6e6e6;
  --shadow: 0 8px 24px rgba(0,0,0,0.08);
  --radius: 18px;
  --gradient: radial-gradient(1200px 600px at 20% -20%, #f5f8ff, transparent 40%), 
              radial-gradient(800px 400px at 100% 0%, #f7fbff, transparent 40%);
  --accent: #0071e3; /* Apple-esque blue */
}

:root.dark {
  --bg: #0b0d10;
  --text: #f1f5f9;
  --muted: #9aa4af;
  --card: #0f1216;
  --border: #1f242b;
  --shadow: 0 8px 24px rgba(0,0,0,0.6);
  --gradient: radial-gradient(1200px 600px at 20% -20%, rgba(62,84,124,0.25), transparent 40%),
              radial-gradient(800px 400px at 100% 0%, rgba(80,105,150,0.2), transparent 40%);
  --accent: #4aa3ff;
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  background: var(--card);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 1000;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 999;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: saturate(180%) blur(20px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.logo { display:block }

.brand-name {
  font-size: 15px;
  letter-spacing: 0.2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  opacity: 0.9;
}

.nav a:hover { opacity: 1; }

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  cursor: pointer;
  position: relative;
}

.icon-btn::before {
  content: "☀️";
  font-size: 16px;
  transform: translateY(1px);
}

:root.dark .icon-btn::before {
  content: "🌙";
}

.hero {
  padding: 88px 0 56px;
  background: var(--gradient);
}

.hero-inner {
  text-align: center;
  padding: 40px 0 10px;
}

.eyebrow {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 8px;
}

h1 {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.lede {
  font-size: clamp(16px, 2.6vw, 20px);
  color: var(--muted);
  margin: 0 auto 24px;
  max-width: 720px;
}

.cta-row { display: inline-flex; gap: 12px; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 12px 18px;
  font-size: 14px;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn.primary {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 15%, white), var(--accent));
  color: white;
  border: none;
}

.btn.ghost {
  background: var(--card);
}

.section {
  padding: 56px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 22px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.1;
  margin: 0;
}

.section-subtitle {
  color: var(--muted);
  margin: 8px auto 0;
  max-width: 720px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

@media (max-width: 780px) {
  .nav-links { display: none; }
  .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateZ(0);
  transition: transform 240ms ease, box-shadow 240ms ease;
}

.card:hover { transform: translateY(-3px); }

.card.muted {
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 94%, transparent), transparent);
}

.card-body {
  padding: 18px 18px 20px;
}

.card-visual {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 30%, var(--card)), var(--card));
  border-bottom: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-weight: 600;
  color: color-mix(in srgb, white 90%, var(--accent));
}

.card-title {
  font-size: 18px;
  margin: 6px 0 6px;
}

.card-desc {
  color: var(--muted);
  margin: 0 0 10px;
  min-height: 48px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 12px;
}

.chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--muted);
  background: color-mix(in srgb, var(--card) 85%, transparent);
}

.card-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.inline-cta {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

.inline-cta[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
}

.blog-card .chip-row { margin: 12px 0 6px; }

/* Form */
.form { display: grid; gap: 12px; }
.form-row { display: grid; gap: 6px; }
label { font-size: 14px; color: var(--muted); }
input, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent);
}

textarea { min-height: 120px; resize: vertical; }
.help { color: var(--muted); min-height: 16px; }
.form-actions { display: flex; align-items: center; gap: 12px; }
.form-note { color: var(--muted); font-size: 12px; }

.toast {
  margin-top: 14px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 10%, var(--card)), var(--card));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(10px); }
.reveal.visible { opacity: 1; transform: none; transition: opacity 700ms ease, transform 700ms ease; }

.footer {
  padding: 26px 0 40px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: 40px;
}