/* ===== penston.studio — Shared Styles ===== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ===== Design Tokens ===== */
:root {
  --bg-primary: #fcfcfc;
  --bg-secondary: #f7f6f3;
  --text-primary: #0f0f0f;
  --text-secondary: #4d4d4d;
  --text-tertiary: #787878;
  --accent: #eb5a00;
  --accent-hover: #b84600;
  --border-light: #e6e6e6;
  --border-medium: #999;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --text-primary: #f2f2f2;
    --text-secondary: #999;
    --text-tertiary: #666;
    --border-light: #212121;
    --border-medium: #4d4d4d;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.25);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.3), 0 4px 6px rgba(0,0,0,0.2);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  line-height: 1.2;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover { color: var(--accent); }

::selection {
  background: var(--accent);
  color: white;
}

*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Layout ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Nav ===== */
.nav {
  padding: 32px 0 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.nav-wordmark span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--border-light);
  padding: 40px 0;
  margin-top: 80px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links a:hover { color: var(--accent); }

/* ===== Back link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

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

.back-link svg { transition: transform 0.2s; }
.back-link:hover svg { transform: translateX(-3px); }

/* ===== Scroll-reveal & entrance animations ===== */
[data-reveal],
[data-stagger] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-stagger] {
  transition-delay: calc(var(--stagger-index, 0) * 0.15s);
}

[data-reveal].is-revealed,
[data-stagger].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-stagger] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}