/* ============================================================
   base.css — Global Styles, Reset, Typography, Layout
   Darkroom Portfolio — Phase 1 Foundation
   Depends on: css/tokens.css (custom properties)
   ============================================================ */

/* --- Minimal CSS Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* --- Global Body --- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: var(--font-size-base);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- App Root --- */
#app {
  min-height: 100vh;
  position: relative;
}

/* --- Headings ---
   Elegant at regular weight — Playfair Display is designed for it */
h1 {
  font-size: var(--font-size-xl);
  font-weight: 400;
  line-height: 1.2;
}

h2 {
  font-size: var(--font-size-lg);
  font-weight: 400;
  line-height: 1.3;
}

h3 {
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.4;
}

/* --- Links --- */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover,
a:focus {
  color: var(--color-amber-glow);
}

/* --- Text Selection --- */
::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* --- Images --- */
img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* --- Accessibility: Visually Hidden ---
   Screen-reader only text, not visible on screen */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Responsive Breakpoints — Mobile-first
   ============================================================ */

/* --- Tablet (768px and up) --- */
@media (min-width: 768px) {
  body {
    font-size: 1.1rem;
  }
}

/* --- Desktop (1024px and up) --- */
@media (min-width: 1024px) {
  body {
    font-size: 1.125rem;
  }
}