/* ============================================================
   VOL.01 shared theme
   The dark, film-framed aesthetic from the homepage, factored
   out so the tool pages (wordle, dbviewer) read as the same set.
   Load AFTER main.css so it wins, BEFORE the page-specific sheet.
   ============================================================ */

/* ===== Cross-document View Transitions =====
   Every page that links this sheet opts in, so navigating between documents
   (home <-> about <-> portfolio <-> tools) cross-fades instead of hard-cutting.
   The shared dark frame (canvas + grain + crop marks) stays put through the
   dissolve, so it reads as one continuous surface with the content morphing. */
@view-transition { navigation: auto; }
@keyframes vt-fade-zoom-out { to   { opacity: 0; transform: scale(0.98); } }
@keyframes vt-fade-zoom-in  { from { opacity: 0; transform: scale(1.02); } }
::view-transition-old(root) { animation: 0.5s cubic-bezier(0.4, 0, 0.2, 1) both vt-fade-zoom-out; }
::view-transition-new(root) { animation: 0.5s cubic-bezier(0.4, 0, 0.2, 1) both vt-fade-zoom-in; }
@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) { animation: none !important; }
}

:root {
  --bg: #060606;
  --text: #e1e1e1;
  --muted: #8a8a8a;
  --accent: #ff3c3c;

  /* surfaces */
  --panel: linear-gradient(135deg, #161616, #0c0c0c);
  --panel-solid: #0d0d0d;
  --tile: #0d0d0d;
  --line: rgba(255, 255, 255, 0.07);
  --line-hover: rgba(255, 60, 60, 0.55);
}

/* Canvas + base type (overrides main.css) */
body.tool-page {
  background: var(--bg) !important;
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Text-selection highlight uses the site accent red */
::selection { background: var(--accent); color: #fff; }
::-moz-selection { background: var(--accent); color: #fff; }

/* Thin accent scrollbars (kept visible on tools, unlike the home hero) */
body.tool-page * { scrollbar-width: thin; scrollbar-color: var(--accent) transparent; }
body.tool-page *::-webkit-scrollbar { width: 6px; height: 6px; }
body.tool-page *::-webkit-scrollbar-track { background: transparent; }
body.tool-page *::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 999px; }

/* ===== Minimal top nav (replaces .top_navbar on tool pages) ===== */
.tool-nav {
  position: relative;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(1.6rem, 5vw, 3.2rem);
  padding: 2.4rem 6vw 0;
}
@media (max-width: 600px) {
  .tool-nav { gap: 1.4rem 1.8rem; padding-top: 1.6rem; }
}
.tool-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: clamp(0.68rem, 1.5vmin, 0.9rem);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  transition: color 0.25s ease;
}
.tool-nav a:hover,
.tool-nav a:focus-visible { color: var(--accent); }
.tool-nav a.active { color: var(--text); }

/* ===== Footer (re-skinned for the dark canvas) ===== */
body.tool-page .footer { position: relative; z-index: 5; }
body.tool-page .footer ul { gap: clamp(1.5rem, 6vw, 5rem); }
body.tool-page .footer a {
  color: var(--muted);
  opacity: 1;
  font-size: clamp(0.62rem, 1.35vmin, 0.85rem);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  transition: color 0.25s ease;
}
body.tool-page .footer a:hover { color: var(--accent); opacity: 1; }

/* ===== Film grain (subtler than the home hero so data stays legible) ===== */
.grain {
  position: fixed;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  z-index: 50;
  pointer-events: none;
  opacity: 0.18;
  mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 300px 300px;
  animation: grain-shift 0.7s steps(5) infinite;
  will-change: transform;
}
@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-6%, 4%); }
  40%  { transform: translate(5%, -5%); }
  60%  { transform: translate(-4%, -6%); }
  80%  { transform: translate(6%, 3%); }
  100% { transform: translate(0, 0); }
}

/* ===== VHS tape effect (full strength, matching the home hero) =====
   Scanlines with a faint RGB bleed, a periodic brightness flicker, and a
   darkened CRT vignette. All layers are pointer-events:none so the UI
   underneath stays clickable. */
.vhs {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  overflow: hidden;
  box-shadow: inset 0 0 9vmax rgba(0, 0, 0, 0.55); /* CRT vignette */
  animation: vhs-flicker 5s steps(48) infinite;
}
/* Scanlines + chromatic (red/cyan) bleed */
.vhs::before {
  content: "";
  position: absolute;
  inset: -3px 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 30, 70, 0.06) 0px,
    rgba(0, 230, 200, 0.05) 1px,
    rgba(0, 0, 0, 0.22) 2px,
    rgba(0, 0, 0, 0.00) 3px
  );
  background-size: 100% 3px;
  mix-blend-mode: overlay;
  opacity: 0.7;
  animation: vhs-scroll 0.45s steps(3) infinite;
}
@keyframes vhs-scroll {
  from { transform: translateY(0); }
  to   { transform: translateY(3px); }
}
@keyframes vhs-flicker {
  0%, 100% { opacity: 1; }
  48% { opacity: 0.97; }
  50% { opacity: 0.91; }
  52% { opacity: 0.99; }
  72% { opacity: 0.95; }
}
@media (prefers-reduced-motion: reduce) {
  .vhs, .vhs::before { animation: none; }
}

/* ===== Album-jacket framing: crop marks + corner liner notes ===== */
.crop .c {
  position: fixed;
  z-index: 40;
  width: clamp(16px, 2.6vmin, 30px);
  height: clamp(16px, 2.6vmin, 30px);
  border: 0 solid rgba(255, 255, 255, 0.18);
  pointer-events: none;
}
.crop .tl { top: clamp(16px,2.6vmin,30px); left: clamp(16px,2.6vmin,30px); border-top-width: 1px; border-left-width: 1px; }
.crop .tr { top: clamp(16px,2.6vmin,30px); right: clamp(16px,2.6vmin,30px); border-top-width: 1px; border-right-width: 1px; }
.crop .bl { bottom: clamp(16px,2.6vmin,30px); left: clamp(16px,2.6vmin,30px); border-bottom-width: 1px; border-left-width: 1px; }
.crop .br { bottom: clamp(16px,2.6vmin,30px); right: clamp(16px,2.6vmin,30px); border-bottom-width: 1px; border-right-width: 1px; }

.meta {
  position: fixed;
  z-index: 41;
  pointer-events: none;
  font-size: clamp(0.5rem, 1.1vmin, 0.7rem);
  letter-spacing: 0.3em;
  color: var(--muted);
  text-transform: uppercase;
}
.meta-tl { top: clamp(22px,3.3vmin,40px); left: clamp(42px,5.4vmin,68px); }
.meta-tr { top: clamp(22px,3.3vmin,40px); right: clamp(42px,5.4vmin,68px); }
.meta-bl { bottom: clamp(22px,3.3vmin,40px); left: clamp(42px,5.4vmin,68px); }
.meta-br { bottom: clamp(22px,3.3vmin,40px); right: clamp(42px,5.4vmin,68px); color: #cfcfcf; }
.meta-br::before {
  content: ""; display: inline-block; vertical-align: middle;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); margin-right: 0.85em;
  animation: meta-pulse 2.4s ease-in-out infinite;
}
@keyframes meta-pulse { 0%,100% { opacity: 0.3; } 50% { opacity: 1; } }

/* Hide the corner liner notes on small screens so they never crowd the UI */
@media (max-width: 720px) {
  .meta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .grain { animation: none; }
  .meta-br::before { animation: none; }
}

/* ===== Info accordion (How-to / Features / FAQ dropdowns) =====
   Shared by the tool pages so the guide + FAQ content collapses into clean,
   keyboard-accessible <details> rows instead of a long wall of text. */
.info-accordion {
  max-width: 880px;
  margin: 3.5rem auto 0;
  padding: 0 20px;
}
.info-accordion .acc-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.4rem;
  padding-left: 2px;
}
details.acc { border-bottom: 1px solid var(--line); }
details.acc:first-of-type { border-top: 1px solid var(--line); }
details.acc summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0.25rem;
  font-size: 15px;
  font-weight: 600;
  color: #ededed;
  transition: color 0.2s ease;
}
details.acc summary::-webkit-details-marker { display: none; }
/* Chevron that rotates open/closed */
details.acc summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.25s ease, border-color 0.2s ease;
}
details.acc summary:hover { color: var(--accent); }
details.acc summary:hover::after { border-color: var(--accent); }
details.acc[open] summary { color: var(--accent); }
details.acc[open] summary::after { transform: rotate(-135deg); border-color: var(--accent); }

.acc-body {
  padding: 0 0.25rem 1.15rem;
  color: #a9a9a9;
  font-size: 14px;
  line-height: 1.7;
  animation: acc-reveal 0.25s ease;
}
@keyframes acc-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}
.acc-body p { margin: 0 0 0.6rem; }
.acc-body p:last-child { margin-bottom: 0; }
.acc-body a { color: var(--accent); text-decoration: none; }
.acc-body a:hover { text-decoration: underline; }
.acc-body ol,
.acc-body ul { margin: 0; padding-left: 1.25rem; }
.acc-body li { margin-bottom: 0.5rem; }
.acc-body strong { color: #ededed; }

.acc-more {
  margin: 1.5rem auto 0;
  max-width: 60ch;
  color: #9a9a9a;
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}
.acc-more a { color: var(--accent); text-decoration: none; }
.acc-more a:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) {
  .acc-body { animation: none; }
}