/* style.css — auto light/dark via prefers-color-scheme */

/* Light tokens (defaults) */
:root{
  --bg:#fbfdff;          /* near-white, low glare */
  --text:#111827;        /* gray-900 */
  --muted:#6b7280;       /* gray-500 */
  --accent:#4f46e5;      /* indigo-600 underline */
  --hover-bg:#111827;   /* dark chip */
  --text-hover:#ffffff; /* white text on chip */
  --selection-bg:#111827;   /* light mode: dark highlight */
  --selection-fg:#ffffff;   /* light mode: white text */
  color-scheme: light dark;     /* enable native UI theming */
}

/* Dark tokens (override when user prefers dark) */
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0e1218;        /* deep blue-black */
    --text:#e6e8ee;      /* gray-100/200 */
    --muted:#a1a9b7;     /* cool gray-400 */
    --accent:#818cf8;    /* indigo-400 */
    --hover-bg:#ffffff;  /* white chip */
    --text-hover:#000000;/* near-black text on chip */
    --selection-bg:#ffffff;  /* dark mode: white highlight */
    --selection-fg:#000000;  /* dark text */
  }
}

/* Back links */
#back-link{
  display:block;
  margin-bottom:1.5rem;
  border-bottom:2px solid var(--accent);
  width:fit-content;
}

/* Base */
body{
  font-family:'Helvetica', sans-serif;
  background:var(--bg);
  color:var(--text);
  margin-block:2rem;
}
h1{
  font-size:1.8rem;
  font-weight:bold;
  display:inline-block;
  padding-bottom:.2rem;
}
h2{ font-size:1.4rem; }
nav{ margin-top:2rem; }
section{ margin-bottom:2rem; }

ul{ list-style:disc; padding-left:1.5rem; }
li{ margin-bottom:.6rem; }

/* Links with underline + soft hover chip */
a{
  color:var(--text);
  border-bottom:2px solid var(--accent);
  text-decoration:none;
  position:relative;
  transition: color .15s, background-color .15s, border-color .15s;
}
a::before{
  content:'';
  position:absolute; inset:0;
  background:var(--hover-bg);
  z-index:-1;
  transform:scaleY(0);
  transform-origin:bottom;
  transition:transform .15s;
}
a:hover::before{ transform:scaleY(1); }
a:hover{ 
  color:var(--text-hover);
}

/* Focus visibility */
a:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  text-underline-offset:2px;
}

/* Text selection */
::selection{ background: var(--selection-bg); color: var(--selection-fg); }
::-moz-selection{ background: var(--selection-bg); color: var(--selection-fg); } /* Firefox */

/* Layout */
header{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
}
footer{
  margin-top:4rem;
  text-align:center;
  font-size:.9rem;
  color:var(--muted);
}
.right-links a{ margin-left:.3rem; }

.meta{
  color:var(--muted);
  font-size:.9rem;
  margin-top:-.5rem;
  margin-bottom:1.5rem;
}

#back-to-list{
  display:block;
  margin-bottom:1.5rem;
  border-bottom:2px solid var(--accent);
  width:fit-content;
}

/* Responsive header */
@media (max-width:600px){
  header{ flex-direction:column; align-items:flex-start; }
  .right-links{ margin-top:1rem; }
}

/* Reading view toggles */
.reading .list-only{ display:none; }
.reading #other-section{ display:none; }

/* Site width */
.container{
  max-width:980px;
  margin-inline:auto;
  padding-inline:1rem;
}
@media (min-width:1400px){
  .container{ max-width:1100px; }
}
header + main{ margin-top:1.25rem; }
#view-section{ margin-top:1rem; }

/* Photos: grid (1→2→3 cols) */
.photo-grid{
  display:grid;
  gap:.75rem;
  grid-template-columns:1fr;
  margin-top:.5rem;
}
@media (min-width:640px){ .photo-grid{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:960px){ .photo-grid{ grid-template-columns:repeat(3,1fr); } }
.photo-grid img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  display:block;
  border-radius:4px;
}

/* Optional masonry variant */
.masonry{ column-count:4; column-gap:.75rem; }
@media (max-width:1200px){ .masonry{ column-count:3; } }
@media (max-width:800px){ .masonry{ column-count:2; } }
.masonry > *{ break-inside:avoid; margin:0 0 .75rem; }
.masonry img{ width:100%; height:auto; }