/* ═══════════════════════════════════════════════════════════════
   DS-SHELL.CSS — Shared Shell Stylesheet
   MSCREATIVE.SYSTEMS Design System v3.0

   Layout frame shared by ALL DS pages: reset, body, grid overlay,
   sidebar, mobile toggle, main content, hero, section headers,
   subsection titles, tables, footer, toast, responsive breakpoints,
   dual-view toggle, and code blocks.

   Depends on: tokens.css (all var(--ds-*) custom properties)
   ═══════════════════════════════════════════════════════════════ */

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

/* ─── BODY ─── */
body {
  font-family: var(--ds-font-body);
  background: linear-gradient(145deg, var(--ds-bg-primary) 0%, var(--ds-bg-secondary) 100%);
  color: var(--ds-text-body);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 16px;
  font-weight: 400;
  background-attachment: fixed;
}

/* ─── GRID OVERLAY ─── */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(var(--ds-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--ds-grid-color) 1px, transparent 1px);
  background-size: var(--ds-grid-size) var(--ds-grid-size);
  pointer-events: none;
  z-index: 0;
}

/* ─── SIDEBAR ─── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--ds-sidebar-width);
  height: 100vh;
  background: rgba(10, 12, 16, 0.95);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--ds-border-subtle);
  padding: 32px 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-logo {
  padding: 0 24px 32px;
  border-bottom: 1px solid var(--ds-border-subtle);
  margin-bottom: 24px;
}

.sidebar-logo h1 {
  font-family: var(--ds-font-display);
  font-variation-settings: "opsz" var(--ds-fraunces-opsz-editorial);
  font-weight: 700;
  font-size: 22px;
  text-transform: uppercase;
  color: var(--ds-ms-accent-1);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.sidebar-logo .version {
  font-family: var(--ds-font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ds-text-muted);
  margin-top: 8px;
}

.sidebar nav { padding: 0 16px; }

.sidebar nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--ds-text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.sidebar nav a:hover, .sidebar nav a.active {
  color: var(--ds-text-primary);
  background: var(--ds-bg-surface);
}

.sidebar nav a.active {
  color: var(--ds-ms-accent-1);
  background: rgba(168, 157, 128, 0.08);
}

.sidebar nav .nav-section {
  font-family: var(--ds-font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ds-ms-accent-1);
  padding: 20px 12px 8px;
}

/* ─── MOBILE TOGGLE ─── */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 16px; left: 16px;
  z-index: 200;
  width: 44px; height: 44px;
  background: rgba(10, 12, 16, 0.9);
  border: 1px solid var(--ds-border-subtle);
  border-radius: 8px;
  color: var(--ds-ms-accent-1);
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ─── MAIN CONTENT ─── */
.main {
  margin-left: var(--ds-sidebar-width);
  padding: 48px 64px 120px;
  max-width: 1100px;
  position: relative;
  z-index: 1;
}

/* ─── HERO ─── */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--ds-border-subtle);
  margin-bottom: 64px;
}

.hero h1 {
  font-family: var(--ds-font-display);
  font-variation-settings: "opsz" var(--ds-fraunces-opsz-display);
  font-weight: 900;
  font-size: clamp(48px, 6vw, 72px);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 0.95;
  color: var(--ds-text-primary);
  margin-bottom: 16px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--ds-ms-accent-1), var(--ds-ms-accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 18px;
  color: var(--ds-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

.hero .rule {
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, var(--ds-ms-accent-1), var(--ds-ms-accent-2));
  border-radius: 2px;
  margin: 24px 0;
}

/* ─── SECTIONS ─── */
section {
  margin-bottom: 80px;
  scroll-margin-top: 32px;
}

.section-header {
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ds-border-subtle);
}

.section-label {
  font-family: var(--ds-font-label);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ds-ms-accent-1);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--ds-font-display);
  font-variation-settings: "opsz" var(--ds-fraunces-opsz-display);
  font-weight: 700;
  font-size: clamp(32px, 4vw, 48px);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--ds-text-primary);
  line-height: 1;
}

.section-desc {
  margin-top: 12px;
  font-size: 16px;
  color: var(--ds-text-muted);
  max-width: 640px;
}

/* ─── SUBSECTION TITLE ─── */
.subsection-title {
  font-family: var(--ds-font-display);
  font-variation-settings: "opsz" var(--ds-fraunces-opsz-editorial);
  font-weight: 700;
  font-size: 20px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  color: var(--ds-text-primary);
  line-height: 1.2;
}

/* ─── DS TABLE ─── */
.ds-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

.ds-table th {
  font-family: var(--ds-font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ds-ms-accent-1);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--ds-border-subtle);
}

.ds-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  font-size: 14px;
  color: var(--ds-text-body);
  vertical-align: top;
}

.ds-table code {
  font-family: var(--ds-font-label);
  font-size: 12px;
  background: rgba(168, 157, 128, 0.08);
  color: var(--ds-ms-accent-1);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ─── FOOTER ─── */
.footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--ds-border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  font-family: var(--ds-font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ds-text-muted);
}

.footer-accent {
  color: var(--ds-ms-accent-1);
}

/* ─── COPY TO CLIPBOARD TOAST ─── */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-ms-accent-1);
  color: var(--ds-text-primary);
  font-family: var(--ds-font-label);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 12px 20px;
  border-radius: 8px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ─── DUAL VIEW TOGGLE ─── */
.section-view-toggle { display: flex; gap: 4px; margin-top: 12px; }
.view-btn {
  font-family: var(--ds-font-label); font-size: 10px; text-transform: uppercase;
  letter-spacing: 0.15em; padding: 6px 14px; border-radius: 4px;
  border: 1px solid var(--ds-border-subtle); background: transparent;
  color: var(--ds-text-muted); cursor: pointer; transition: all 0.2s;
}
.view-btn:hover { border-color: rgba(255,255,255,0.12); color: var(--ds-text-primary); }
.view-btn.active { background: rgba(168,157,128,0.08); border-color: rgba(168,157,128,0.2); color: var(--ds-ms-accent-1); }
.view-code[hidden] { display: none; }

/* ─── CODE BLOCKS ─── */
.ds-code-block { margin: 20px 0; background: var(--ds-bg-surface); border: 1px solid var(--ds-border-subtle); border-radius: 10px; overflow: hidden; }
.ds-code-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--ds-border-subtle); }
.ds-code-label { font-family: var(--ds-font-label); font-size: 10px; text-transform: uppercase; letter-spacing: 0.15em; color: var(--ds-ms-accent-1); }
.ds-code-copy { font-family: var(--ds-font-label); font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em; padding: 4px 12px; border-radius: 4px; border: 1px solid var(--ds-border-subtle); background: transparent; color: var(--ds-text-muted); cursor: pointer; transition: all 0.2s; }
.ds-code-copy:hover { border-color: var(--ds-ms-accent-1); color: var(--ds-ms-accent-1); }
.ds-code-block pre { margin: 0; padding: 16px 20px; overflow-x: auto; }
.ds-code-block code { font-family: var(--ds-font-label); font-size: 12px; line-height: 1.6; color: var(--ds-text-body); white-space: pre; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .main { padding: 48px 32px 120px; }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: flex; }
  .main { margin-left: 0; padding: 80px 20px 120px; }
}