/* ============================================================
   PETROLI DIGITAL — BASE + SHELL
   ============================================================ */

* { box-sizing: border-box; }
html, body { margin:0; padding:0; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  color: var(--ink);
  background: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss03", "cv11";
}

::selection { background: var(--lime); color: var(--on-accent); }

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; cursor: pointer; }

code, pre, kbd, .mono {
  font-family: var(--font-mono);
  font-feature-settings: "calt" off, "ss03";
}

/* ----- mono labels (used everywhere as section markers) ----- */
.mono-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 500;
}
.mono-label .dot {
  display:inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--lime);
  margin-right: 8px;
  vertical-align: middle;
  transform: translateY(-1px);
}

/* ============================================================
   APP SHELL — sidebar + main
   ============================================================ */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* ----- SIDEBAR ----- */
.sidebar {
  background: var(--bg-canvas);
  border-right: 1px solid var(--line);
  padding: 28px 20px 24px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 999px; }

.brand {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 32px;
  padding: 0 6px;
}
.brand .mark {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--bg-canvas);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  position: relative;
}
.brand .mark::after {
  content: "";
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--lime);
  bottom: 4px; right: 4px;
}
.brand .name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.brand .name em { font-style: normal; color: var(--lime-deep); }
[data-theme="dark"] .brand .name em { color: var(--lime); }
.brand .ver {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: var(--tracking-wide);
  margin-top: 2px;
}

.nav-section {
  margin-bottom: 22px;
}
.nav-section-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 0 10px 8px;
  font-weight: 500;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--r-2);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-muted);
  transition: background 0.12s, color 0.12s;
  letter-spacing: 0.01em;
}
.nav-link:hover { background: var(--bg-hover); color: var(--ink); }
.nav-link.active { background: var(--bg-elevated); color: var(--ink); }
.nav-link.active::before {
  content: "";
  width: 4px; height: 4px;
  background: var(--lime);
  border-radius: 50%;
  margin-left: -2px;
}
.nav-link:not(.active) .slash { color: var(--ink-faint); margin-right: -4px; }

.sidebar-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 3px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  width: fit-content;
}
.theme-toggle button {
  border: 0;
  background: transparent;
  color: var(--ink-dim);
  padding: 6px 10px;
  border-radius: var(--r-2);
  font-family: var(--font-mono);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.12s, background 0.12s;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.theme-toggle button.active {
  background: var(--bg-canvas);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
.theme-toggle button svg { width: 12px; height: 12px; }

.sidebar-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
  line-height: 1.5;
  padding: 0 6px;
  letter-spacing: 0.04em;
}

/* ----- MAIN ----- */
.main {
  min-width: 0;
  background: var(--bg-canvas);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in oklab, var(--bg-canvas) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 20;
}
.topbar .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}
.topbar .crumbs .sep { color: var(--ink-faint); }
.topbar .crumbs .here { color: var(--ink); }
.topbar .actions { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 11px; color: var(--ink-dim); letter-spacing: 0.05em; }
.topbar .actions .blink { width: 8px; height: 8px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 8px var(--lime); animation: blink 2.4s ease-in-out infinite; }
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.page {
  padding: 56px 48px 96px;
  max-width: 1180px;
}
.page-head {
  margin-bottom: 56px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}
.page-head .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 16px;
}
.page-head .eyebrow b { color: var(--lime-deep); font-weight: 500; }
[data-theme="dark"] .page-head .eyebrow b { color: var(--lime); }
.page-head h1 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-5xl);
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 0 0 18px;
}
.page-head h1 em { font-style: normal; color: var(--ink-muted); }
.page-head .lede {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  color: var(--ink-muted);
  max-width: 60ch;
  margin: 0;
}

/* page sections */
.section {
  margin-bottom: 72px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
  margin: 0;
}
.section-head .meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--ink-dim);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.section-sub {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--ink-muted);
  margin: -8px 0 24px;
  max-width: 60ch;
  line-height: 1.55;
}

/* ============================================================
   PRIMITIVE COMPONENTS — reused across pages
   ============================================================ */

/* card / panel */
.panel {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  padding: 24px;
}

/* button */
.btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  padding: 9px 14px;
  border-radius: var(--r-2);
  border: 1px solid var(--line-strong);
  background: var(--bg-surface);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  letter-spacing: 0.01em;
}
.btn:hover { background: var(--bg-hover); border-color: var(--ink-dim); }
.btn:focus-visible { outline: 2px solid var(--lime); outline-offset: 2px; }
.btn.primary {
  background: var(--lime);
  color: var(--on-accent);
  border-color: var(--lime);
  font-weight: 600;
}
.btn.primary:hover { background: var(--lime-bright); border-color: var(--lime-bright); }
.btn.dark {
  background: var(--ink);
  color: var(--bg-canvas);
  border-color: var(--ink);
}
.btn.dark:hover { background: var(--ink-strong); border-color: var(--ink-strong); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-muted); }
.btn.ghost:hover { color: var(--ink); background: var(--bg-hover); }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.sm { padding: 6px 10px; font-size: 11.5px; }
.btn.lg { padding: 12px 18px; font-size: 13.5px; }
.btn .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: 0.6; }

/* badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: var(--r-1);
  background: var(--bg-elevated);
  color: var(--ink-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line);
}
.badge.lime { background: var(--lime-soft); color: var(--lime-deep); border-color: transparent; }
[data-theme="dark"] .badge.lime { color: var(--lime); }
.badge.solid { background: var(--lime); color: var(--on-accent); border-color: var(--lime); }
.badge.success { background: rgba(74,222,128,0.12); color: #2f9e5a; border-color: transparent; }
[data-theme="dark"] .badge.success { color: var(--success); }
.badge.warn { background: rgba(255,140,66,0.12); color: #b85a1c; border-color: transparent; }
[data-theme="dark"] .badge.warn { color: var(--warning); }
.badge.danger { background: rgba(239,68,68,0.12); color: #b91c1c; border-color: transparent; }
[data-theme="dark"] .badge.danger { color: var(--danger); }

/* input */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.input, .textarea, .select {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  background: var(--bg-surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-2);
  padding: 10px 12px;
  width: 100%;
  outline: none;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.input::placeholder, .textarea::placeholder { color: var(--ink-faint); }
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--lime);
  box-shadow: 0 0 0 3px var(--lime-soft);
}
.textarea { min-height: 96px; resize: vertical; line-height: 1.5; }

/* kbd */
kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  font-size: 11px;
  color: var(--ink-muted);
}

/* hr */
hr.sep {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}

/* responsive */
@media (max-width: 900px) {
  :root { --sidebar-w: 0; }
  .sidebar { display: none; }
  .topbar { padding: 16px 20px; }
  .page { padding: 32px 20px 64px; }
  .page-head h1 { font-size: var(--fs-4xl); }
}