/* Apple Notes Ideas — GitHub Pages */

:root {
  --bg: #faf9f7;
  --bg-dark: #0f1117;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #f5c518;
  --accent-dark: #d4a106;
  --blue: #2563eb;
  --blue-soft: #eff6ff;
  --border: #e8e6e1;
  --code-bg: #1e1e2e;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --max: 920px;
  --font: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Monaco, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 14px;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--text);
  color: #fff;
}

.btn-primary:hover {
  box-shadow: var(--shadow);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

/* Hero */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

/* Sections */
section {
  padding: 3.5rem 1.5rem;
}

section:nth-child(even) {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.85rem;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
}

p {
  margin: 0 0 1rem;
}

ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

li {
  margin-bottom: 0.4rem;
}

/* Cards & grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.card h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* Steps */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  align-items: start;
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.step-content h3 {
  margin-top: 0;
}

.step-img {
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-top: 1rem;
  box-shadow: var(--shadow);
}

.caption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Code */
pre {
  background: var(--code-bg);
  color: #cdd6f4;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 1rem 0;
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: rgba(0, 0, 0, 0.06);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

pre code {
  background: none;
  padding: 0;
}

/* Diagram */
.diagram-wrap {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

.diagram-wrap img {
  width: 100%;
  max-width: 700px;
  display: block;
  margin: 0 auto;
}

.flow-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 1rem 0;
  font-size: 0.9rem;
}

.flow-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.flow-box {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-weight: 600;
  text-align: center;
  min-width: 120px;
}

.flow-box.accent {
  border-color: var(--accent);
  background: #fffbeb;
}

.flow-box.blue {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.flow-arrow {
  font-size: 1.25rem;
  color: var(--muted);
  padding: 0.25rem 0;
}

/* Callout */
.callout {
  background: var(--blue-soft);
  border-left: 4px solid var(--blue);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}

.callout-warning {
  background: #fffbeb;
  border-left-color: var(--accent-dark);
}

.callout strong {
  display: block;
  margin-bottom: 0.35rem;
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg);
  font-weight: 600;
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: #9ca3af;
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.9rem;
}

.site-footer a {
  color: #e5e7eb;
}

.site-footer p {
  margin: 0.35rem 0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .step {
    grid-template-columns: 40px 1fr;
  }

  .step-num {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .nav-links {
    display: none;
  }
}