/* =========================================================
   MLD SOP Library — design tokens
   Concept: an internal "operations binder" — hairline-ruled
   pages, a spine-tab index by category, and a document
   stamp block that mirrors the real SOP header fields
   (ID / version / owner / review cycle).
   ========================================================= */

:root {
  --ink: #1B2430;
  --ink-soft: #2E3947;
  --paper: #F7F5F0;
  --paper-raised: #FFFFFF;
  --slate: #5B6472;
  --slate-light: #8891A0;
  --hairline: #DBD6C9;
  --amber: #C98A3D;
  --amber-soft: #F1E3CC;
  --green: #3F7D58;
  --green-soft: #E3EEE6;
  --red: #B4483C;
  --red-soft: #F5E2DF;

  --font-display: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius: 3px;
  --shadow-card: 0 1px 2px rgba(27, 36, 48, 0.06), 0 1px 1px rgba(27, 36, 48, 0.04);
}

/* category spine colors — real, used for scanning by task type */
:root {
  --cat-research: #4C6B8A;
  --cat-content: #C98A3D;
  --cat-metadata: #6B7F4F;
  --cat-qa: #A2483D;
  --cat-general: #5B6472;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

a { color: inherit; }

::selection { background: var(--amber-soft); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---------------- Login ---------------- */

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    repeating-linear-gradient(180deg, transparent, transparent 39px, var(--hairline) 40px),
    var(--paper);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 40px 36px 32px;
  position: relative;
}

.login-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cat-research), var(--cat-content), var(--cat-metadata), var(--cat-qa));
  border-radius: var(--radius) var(--radius) 0 0;
}

.login-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-light);
  margin: 0 0 6px;
}

.login-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 4px;
  line-height: 1.2;
}

.login-sub {
  font-size: 13.5px;
  color: var(--slate);
  margin: 0 0 28px;
  line-height: 1.5;
}

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.text-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 10px 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
}

.text-input:focus {
  border-color: var(--amber);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  width: 100%;
  margin-top: 22px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.btn-primary:hover { background: var(--ink-soft); }

.btn-ghost {
  background: transparent;
  color: var(--slate);
  border-color: var(--hairline);
}

.btn-ghost:hover { border-color: var(--slate-light); color: var(--ink); }

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--red-soft);
}
.btn-danger:hover { background: var(--red-soft); }

.form-error {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--red);
  background: var(--red-soft);
  border: 1px solid rgba(180, 72, 60, 0.25);
  border-radius: var(--radius);
  padding: 8px 10px;
  display: none;
}

.form-error.visible { display: block; }

.login-hint {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--hairline);
  font-size: 11.5px;
  color: var(--slate-light);
  line-height: 1.6;
}

/* ---------------- App shell ---------------- */

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.spine {
  background: var(--ink);
  color: var(--paper);
  padding: 24px 0 24px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.spine-brand {
  padding: 0 22px 20px;
  border-bottom: 1px solid rgba(247,245,240,0.12);
  margin-bottom: 18px;
}

.spine-brand-eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(247,245,240,0.5);
}

.spine-brand-title {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 3px 0 0;
}

.spine-search {
  margin: 0 22px 18px;
}

.spine-search input {
  width: 100%;
  background: rgba(247,245,240,0.08);
  border: 1px solid rgba(247,245,240,0.14);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 13px;
  font-family: var(--font-body);
}

.spine-search input::placeholder { color: rgba(247,245,240,0.4); }

.spine-nav {
  padding: 0 12px;
  flex: 1;
}

.spine-group-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(247,245,240,0.38);
  padding: 14px 10px 6px;
}

.spine-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13.5px;
  color: rgba(247,245,240,0.82);
  border-left: 3px solid transparent;
  margin-bottom: 2px;
  transition: background 0.12s ease;
}

.spine-item:hover { background: rgba(247,245,240,0.06); }

.spine-item.active {
  background: rgba(247,245,240,0.1);
  color: var(--paper);
}

.spine-tab {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.spine-item-id {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: rgba(247,245,240,0.4);
  margin-left: auto;
  flex-shrink: 0;
}

.spine-footer {
  padding: 16px 22px 0;
  border-top: 1px solid rgba(247,245,240,0.12);
  margin-top: 14px;
}

.spine-user {
  font-size: 12px;
  color: rgba(247,245,240,0.55);
  margin-bottom: 10px;
}

.spine-user strong { color: var(--paper); display: block; font-size: 13px; }

.spine-empty {
  padding: 14px 10px;
  font-size: 12.5px;
  color: rgba(247,245,240,0.4);
}

/* ---------------- Main content ---------------- */

.main {
  padding: 40px 56px 80px;
  max-width: 860px;
}

.main-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--slate-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.welcome-card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 48px 44px;
  box-shadow: var(--shadow-card);
}

.welcome-card h1 {
  font-family: var(--font-display);
  font-size: 28px;
  margin: 0 0 10px;
}

.welcome-card p {
  color: var(--slate);
  font-size: 14.5px;
  line-height: 1.65;
  max-width: 46ch;
}

/* document stamp block — mirrors the real SOP header fields */

.doc-stamp {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper-raised);
  box-shadow: var(--shadow-card);
  padding: 30px 34px 26px;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}

.doc-stamp .doc-id {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--slate-light);
  margin-bottom: 10px;
}

.doc-stamp h1 {
  font-family: var(--font-display);
  font-size: 27px;
  margin: 0 0 18px;
  line-height: 1.25;
}

.doc-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 34px;
  padding-top: 16px;
  border-top: 1px dashed var(--hairline);
}

.doc-meta-item {
  min-width: 120px;
}

.doc-meta-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--slate-light);
  margin-bottom: 3px;
}

.doc-meta-value {
  font-size: 13.5px;
  color: var(--ink-soft);
}

.doc-body {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper-raised);
  box-shadow: var(--shadow-card);
  padding: 44px 48px;
}

.doc-body h1 { font-family: var(--font-display); font-size: 22px; }
.doc-body h2 {
  font-family: var(--font-display);
  font-size: 18.5px;
  margin-top: 34px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hairline);
}
.doc-body h3 { font-size: 15px; margin-top: 22px; color: var(--ink-soft); }
.doc-body p, .doc-body li { font-size: 14.5px; line-height: 1.7; color: var(--ink-soft); }
.doc-body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 13.5px; }
.doc-body th, .doc-body td { border: 1px solid var(--hairline); padding: 8px 10px; text-align: left; }
.doc-body th { background: var(--paper); font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; }
.doc-body code { font-family: var(--font-mono); background: var(--paper); padding: 1px 5px; border-radius: 2px; font-size: 13px; }
.doc-body img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--hairline); }
.doc-body a { color: var(--amber); text-decoration: underline; text-decoration-color: var(--amber-soft); }

/* category badge, reused in spine + stamp */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 20px;
}

/* ---------------- Admin: upload ---------------- */

.panel {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--paper-raised);
  box-shadow: var(--shadow-card);
  padding: 34px 38px;
  margin-bottom: 24px;
}

.panel h2 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0 0 4px;
}

.panel-sub {
  font-size: 13px;
  color: var(--slate);
  margin: 0 0 24px;
}

.field { margin-bottom: 18px; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 16px;
}

.dropzone {
  border: 1.5px dashed var(--hairline);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  color: var(--slate);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--amber);
  background: var(--amber-soft);
}

.dropzone input { display: none; }

.status-line {
  font-size: 12.5px;
  margin-top: 10px;
  display: none;
  padding: 8px 10px;
  border-radius: var(--radius);
}
.status-line.visible { display: block; }
.status-line.ok { background: var(--green-soft); color: var(--green); }
.status-line.err { background: var(--red-soft); color: var(--red); }
.status-line.pending { background: var(--amber-soft); color: #8a5a1f; }

.preview-frame {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 26px 30px;
  max-height: 420px;
  overflow-y: auto;
  background: var(--paper);
}

.manage-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
  gap: 16px;
}
.manage-row:last-child { border-bottom: none; }

.manage-title { font-size: 14px; font-weight: 600; }
.manage-meta { font-family: var(--font-mono); font-size: 11px; color: var(--slate-light); margin-top: 2px; }

.manage-actions { display: flex; gap: 8px; flex-shrink: 0; }

select.text-input { font-family: var(--font-body); }

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }
  .spine { position: relative; height: auto; }
  .main { padding: 28px 20px 60px; }
  .field-row { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}