/*
 * Art Nexus Suite — shared.css
 * Dark Atelier design system: tokens, typography, nav, layout, components.
 * All pages link to this file; page-specific styles remain inline.
 *
 * Readability notes (v1.1):
 *   --text-dim   raised from #4a4438 → #625b52  (better contrast on dark bg)
 *   --text-muted raised from #7a7060 → #8c8070  (approaches WCAG AA)
 *   Label/badge minimum font size raised to 0.68rem throughout.
 *   Antialiasing added to body for crisper dark-mode rendering.
 */

/* ── Fonts ─────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,ital,wght@8..60,0,300;8..60,0,400;8..60,0,600;8..60,1,300&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ─────────────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-base:        #0e0d0b;
  --bg-surface:     #161410;
  --bg-raised:      #1e1b16;
  --bg-overlay:     #26221b;

  /* Accent */
  --da-accent:      #c8912a;
  --da-accent-dim:  #8a6219;
  --da-accent-glow: #c8912a22;

  /* Text — raised for readability on dark backgrounds */
  --text-primary:   #e8dfc8;
  --text-muted:     #b8a48b;   /* was #7a7060 */
  --text-dim:       #b3afab;   /* was #4a4438 */

  /* Borders */
  --border-subtle:  #2a2620;
  --border-mid:     #3a3428;

  /* Typography */
  --font-serif:     'Source Serif 4', Georgia, serif;
  --font-mono:      'JetBrains Mono', 'Courier New', monospace;

  /* Layout — pages override --left-col as needed */
  --left-col:       340px;
}

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

/* ── Base body ─────────────────────────────────────────────────────── */
body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Suite nav (class-based — styleblender, movementbrowser,
                colorpalette, index) ─────────────────────────────────── */
.suite-header {
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface);
}

.suite-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.suite-logo {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--da-accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: clamp(0.55rem, 0.9vw, 0.72rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #7a6a52;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: #b07a22; }
.nav-links a.active { color: #c8912a; border-bottom-color: #c8912a; }

/* ── Suite nav (id-based — promptbuilder, artistexplorer) ─────────── */
#suiteNav {
  align-self: stretch;
  background: #161410;
  border-bottom: 1px solid #2a2620;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

#suiteNav a.suite-logo {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #c8912a;
  text-decoration: none;
}

#suiteNav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0; padding: 0;
}

#suiteNav ul a {
  font-size: clamp(0.55rem, 0.9vw, 0.72rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #7a6a52;
  text-decoration: none;
  transition: color 0.2s;
}

#suiteNav ul a:hover { color: #b07a22; }
#suiteNav ul a.active { color: #c8912a; border-bottom-color: #c8912a; }

/* ── Page title block ──────────────────────────────────────────────── */
.page-title-block,
.page-header {
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.page-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;            /* was 0.65rem */
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--da-accent);
  margin-bottom: 0.4rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 300;
  line-height: 1.2;
}

.page-subtitle {
  margin-top: 0.3rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 68ch;
  margin-bottom: 0;
}

/* ── Two-column app layout ─────────────────────────────────────────── */
.app-body {
  display: grid;
  grid-template-columns: var(--left-col, 340px) 1fr;
  align-items: start;
}

/* ── Generic sticky left panel (used by colorpalette) ─────────────── */
.left-panel {
  border-right: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
}

.left-panel::-webkit-scrollbar { width: 4px; }
.left-panel::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 2px; }

/* ── Panel section ─────────────────────────────────────────────────── */
.panel-section {
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.panel-section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;            /* was 0.58rem */
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

/* ── Buttons ───────────────────────────────────────────────────────── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;            /* was 0.67–0.68rem */
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.42rem 1rem;
  border-radius: 3px;
  border: 1px solid;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--da-accent-dim);
  border-color: var(--da-accent);
  color: var(--da-accent);
}
.btn-primary:hover  { background: var(--da-accent); color: var(--bg-base); }
.btn-primary:disabled { opacity: 0.3; pointer-events: none; }

.btn-secondary {
  background: transparent;
  border-color: var(--border-mid);
  color: var(--text-muted);
}
.btn-secondary:hover { border-color: var(--da-accent-dim); color: var(--da-accent); }

/* Toggle buttons (mode/sort selectors) */
.toggle-btn {
  background: var(--bg-raised);
  border: 1px solid var(--border-mid);
  border-radius: 3px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;            /* was 0.65rem */
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.65rem;
  cursor: pointer;
  transition: all 0.15s;
}
.toggle-btn:hover  { border-color: var(--da-accent-dim); color: var(--da-accent); }
.toggle-btn.active {
  background: var(--da-accent-dim);
  border-color: var(--da-accent);
  color: var(--da-accent);
}

/* Small utility buttons */
.small-btn {
  font-family: var(--font-mono);
  font-size: 0.65rem;            /* was 0.6rem */
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.7rem;
  background: var(--bg-raised);
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}
.small-btn:hover { border-color: var(--da-accent-dim); color: var(--da-accent); }

/* ── Output blocks ─────────────────────────────────────────────────── */
.output-block {
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 1.75rem;
}

.output-block-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.output-block-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;            /* was 0.58rem */
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.output-copy-btn {
  font-family: var(--font-mono);
  font-size: 0.65rem;            /* was 0.58rem */
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  background: var(--bg-raised);
  border: 1px solid var(--border-mid);
  color: var(--text-muted);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}
.output-copy-btn:hover { border-color: var(--da-accent-dim); color: var(--da-accent); }
.output-copy-btn.ok   { border-color: #4a7c59; color: #7abf90; }

.output-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-primary);
  line-height: 1.65;
  background: var(--bg-base);
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  padding: 0.65rem 0.9rem;
  word-break: break-word;
  min-height: 2.4rem;
}
.output-text.empty {
  color: var(--text-dim);
  font-style: italic;
}

/* ── Copy feedback ─────────────────────────────────────────────────── */
.copy-feedback {
  font-family: var(--font-mono);
  font-size: 0.68rem;            /* was 0.65rem */
  color: #6aaf88;
  opacity: 0;
  transition: opacity 0.3s;
  align-self: center;
}
.copy-feedback.show { opacity: 1; }

/* ── Scrollbar (webkit) ────────────────────────────────────────────── */
::-webkit-scrollbar        { width: 4px; height: 4px; }
::-webkit-scrollbar-track  { background: transparent; }
::-webkit-scrollbar-thumb  { background: var(--border-mid); border-radius: 2px; }

/* ── Shared animation keyframes ────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Mobile Navigation ──────────────────────────────────────────────── */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  color: var(--da-accent, #c8912a);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.hamburger-btn:hover {
  background: rgba(200, 145, 42, 0.1);
}

@media (max-width: 768px) {
  .hamburger-btn {
    display: block;
  }
  
  .suite-nav, #suiteNav {
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
  }
  
  .suite-header {
    padding: 1rem;
  }

  .nav-links, #suiteNav ul {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 1rem;
    padding-bottom: 0.5rem;
    gap: 1rem;
  }

  .nav-links.mobile-open, #suiteNav ul.mobile-open {
    display: flex;
  }
}