/* ==========================================================================
   MyBook — Design System (mybook.css)
   Brand Package v1.0 applied: ink blue + amber on cream paper.
   Loaded AFTER Bootstrap 5.3 and AFTER custom_light/dark.css.
   ========================================================================== */

/* ---------- Self-hosted fonts ------------------------------------------- */
@font-face {
  font-family: 'Instrument Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/instrumentserif-regular-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/instrumentserif-italic-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/instrumentserif-regular-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/instrumentserif-italic-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ==========================================================================
   THEME TOKENS
   Five themes, all designed for long reading/writing sessions.
   Default `:root` = Light. Each [data-theme="..."] overrides the tokens.
   ========================================================================== */

:root {
  /* Brand constants (don't shift per theme — these are *the* brand colors) */
  --mb-ink-blue:  #1F4E8A;
  --mb-blue-mid:  #3A6EA5;
  --mb-blue-soft: #6B9BD1;
  --mb-amber:     #E8B73A;
  --mb-amber-soft:#F6DD8A;

  /* ---------- LIGHT (default) — cool, modern, easy on eyes ------------- */
  /* Subtle cool whitish-blue, low chroma. Like quiet daylight on paper. */
  --mb-bg:        #f4f6fa;
  --mb-bg-elev:   #ffffff;
  --mb-bg-subtle: #eef1f7;
  --mb-bg-hover:  #e6ebf3;

  --mb-text:        #0f172a;
  --mb-text-muted:  #475569;
  --mb-text-faint:  #94a3b8;
  --mb-text-on-brand: #ffffff;
  --mb-link:        #1F4E8A;

  --mb-border:        #e2e6ef;
  --mb-border-strong: #cbd5e1;
  --mb-border-focus:  var(--mb-ink-blue);
  --mb-ring:          rgba(31, 78, 138, 0.16);

  --mb-brand-1:     var(--mb-ink-blue);
  --mb-brand-2:     var(--mb-blue-mid);
  --mb-brand-3:     var(--mb-amber);
  --mb-brand-fg:    #ffffff;
  --mb-brand-hover: #173d6e;

  --mb-success:     #1f6b3a;
  --mb-success-bg:  #e8f3e9;
  --mb-warning:     #8a5a1a;
  --mb-warning-bg:  #fdf3dc;
  --mb-danger:      #a02525;
  --mb-danger-bg:   #fbe9e7;
  --mb-info:        var(--mb-ink-blue);
  --mb-info-bg:     #e6eef8;

  --mb-radius-sm:   8px;
  --mb-radius:      12px;
  --mb-radius-lg:   16px;
  --mb-radius-full: 9999px;
  --mb-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --mb-shadow:    0 4px 14px -6px rgba(15, 23, 42, 0.10), 0 2px 6px -2px rgba(15, 23, 42, 0.06);
  --mb-shadow-lg: 0 20px 50px -20px rgba(15, 23, 42, 0.18), 0 8px 20px -10px rgba(15, 23, 42, 0.08);
  --mb-ease: cubic-bezier(.2,.7,.3,1);

  --mb-font: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mb-font-serif: 'Instrument Serif', 'Times New Roman', Times, serif;
  --mb-font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* Per-theme nav tint (matches bg, used in semi-transparent nav) */
  --mb-nav-bg: rgba(244, 246, 250, 0.86);
}

/* Explicit Light selector (so the picker can request it) */
html[data-theme="light"] {
  /* identical to :root above */
}

/* ---------- PAPER — warm cream, brand-canonical ------------------------ */
html[data-theme="paper"] {
  --mb-bg:        #FBF7EC;
  --mb-bg-elev:   #ffffff;
  --mb-bg-subtle: #F6F1E4;
  --mb-bg-hover:  #efe6cf;

  --mb-text:        #1A1714;
  --mb-text-muted:  rgba(26, 23, 20, 0.62);
  --mb-text-faint:  rgba(26, 23, 20, 0.40);

  --mb-border:        rgba(26, 23, 20, 0.12);
  --mb-border-strong: rgba(26, 23, 20, 0.22);

  --mb-brand-1:     var(--mb-ink-blue);
  --mb-link:        var(--mb-ink-blue);

  --mb-shadow-sm: 0 1px 2px rgba(26, 23, 20, 0.06);
  --mb-shadow:    0 4px 14px -6px rgba(26, 23, 20, 0.16), 0 2px 6px -2px rgba(26, 23, 20, 0.08);
  --mb-shadow-lg: 0 20px 50px -20px rgba(26, 23, 20, 0.24), 0 8px 20px -10px rgba(26, 23, 20, 0.10);

  --mb-nav-bg: rgba(251, 247, 236, 0.86);
}

/* ---------- SAGE — soft mint green, calming for long sessions -------- */
/* Greens reduce eye strain over long focus periods. Low chroma so it
   never tints the writing area aggressively. */
html[data-theme="sage"] {
  --mb-bg:        #eaf2ec;
  --mb-bg-elev:   #ffffff;
  --mb-bg-subtle: #dde8df;
  --mb-bg-hover:  #d2dfd5;

  --mb-text:        #1a2a23;
  --mb-text-muted:  rgba(26, 42, 35, 0.62);
  --mb-text-faint:  rgba(26, 42, 35, 0.40);

  --mb-border:        rgba(26, 42, 35, 0.13);
  --mb-border-strong: rgba(26, 42, 35, 0.24);
  --mb-border-focus:  #2d6a4f;
  --mb-ring:          rgba(45, 106, 79, 0.18);

  --mb-brand-1:     #2d6a4f;          /* deep sage accent */
  --mb-brand-hover: #235337;
  --mb-link:        #235337;

  --mb-info-bg:     #d9e7e1;
  --mb-success-bg:  #d4eadb;
  --mb-warning-bg:  #efe3c5;
  --mb-danger-bg:   #ecdad6;

  --mb-shadow-sm: 0 1px 2px rgba(26, 42, 35, 0.06);
  --mb-shadow:    0 4px 14px -6px rgba(26, 42, 35, 0.16), 0 2px 6px -2px rgba(26, 42, 35, 0.08);
  --mb-shadow-lg: 0 20px 50px -20px rgba(26, 42, 35, 0.22);

  --mb-nav-bg: rgba(234, 242, 236, 0.86);
}

/* ---------- SLATE — cool twilight, dim but not dark ------------------- */
html[data-theme="slate"] {
  --mb-bg:        #1e2536;
  --mb-bg-elev:   #283045;
  --mb-bg-subtle: #232b3e;
  --mb-bg-hover:  #2d3650;

  --mb-text:        #d9dfeb;
  --mb-text-muted:  rgba(217, 223, 235, 0.70);
  --mb-text-faint:  rgba(217, 223, 235, 0.45);

  --mb-border:        rgba(217, 223, 235, 0.12);
  --mb-border-strong: rgba(217, 223, 235, 0.24);
  --mb-border-focus:  var(--mb-blue-soft);
  --mb-ring:          rgba(107, 155, 209, 0.24);

  --mb-brand-1:     var(--mb-blue-soft);
  --mb-brand-hover: #8db5e0;
  --mb-link:        var(--mb-blue-soft);
  --mb-text-on-brand: #0b1020;

  --mb-info-bg:     #2a3550;
  --mb-success-bg:  #1f3b2c;
  --mb-warning-bg:  #3d3220;
  --mb-danger-bg:   #3d2222;
  --mb-success:     #b2e2b9;
  --mb-warning:     #f3d894;
  --mb-danger:      #f0b8b2;
  --mb-info:        var(--mb-blue-soft);

  --mb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.30);
  --mb-shadow:    0 4px 14px -6px rgba(0, 0, 0, 0.45), 0 2px 6px -2px rgba(0, 0, 0, 0.30);
  --mb-shadow-lg: 0 24px 56px -22px rgba(0, 0, 0, 0.50);

  --mb-nav-bg: rgba(30, 37, 54, 0.86);
}

/* ---------- DARK / NIGHT — full dark for low-light reading ------------ */
html[data-theme="dark"],
.mb-theme-dark {
  --mb-bg:        #0b1020;
  --mb-bg-elev:   #131a2e;
  --mb-bg-subtle: #18203a;
  --mb-bg-hover:  #1f2944;

  --mb-text:        #e6e8ef;
  --mb-text-muted:  rgba(230, 232, 239, 0.72);
  --mb-text-faint:  rgba(230, 232, 239, 0.45);

  --mb-border:        rgba(230, 232, 239, 0.10);
  --mb-border-strong: rgba(230, 232, 239, 0.22);
  --mb-border-focus:  var(--mb-blue-soft);
  --mb-ring:          rgba(107, 155, 209, 0.28);

  --mb-brand-1:     var(--mb-blue-soft);
  --mb-brand-hover: #8db5e0;
  --mb-link:        var(--mb-blue-soft);
  --mb-text-on-brand: #0b1020;

  --mb-info-bg:     #16223a;
  --mb-success-bg:  #16321f;
  --mb-warning-bg:  #2f2516;
  --mb-danger-bg:   #2f1818;
  --mb-success:     #b2e2b9;
  --mb-warning:     #f3d894;
  --mb-danger:      #f0b8b2;
  --mb-info:        var(--mb-blue-soft);

  --mb-shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --mb-shadow:    0 4px 14px -6px rgba(0,0,0,0.5), 0 2px 6px -2px rgba(0,0,0,0.35);
  --mb-shadow-lg: 0 30px 60px -20px rgba(0,0,0,0.55);

  --mb-nav-bg: rgba(11, 16, 32, 0.82);
}

/* ---------- Reset + base ----------------------------------------------- */
/* Border-box for all — Bootstrap sets this, but public pages don't load
   Bootstrap so we need it here too. Without it, min-height + padding leak
   past A4 dimensions. */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  font-family: var(--mb-font);
  color: var(--mb-text);
  background: var(--mb-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body.my-body { background: var(--mb-bg); color: var(--mb-text); }
a { color: var(--mb-link); }
a:hover { color: var(--mb-brand-hover); }
hr { border: none; border-top: 1px solid var(--mb-border); margin: 1em 0; }
::selection { background: var(--mb-amber-soft); color: var(--mb-ink); }

/* ---------- Layout shells ---------------------------------------------- */
.mb-page {
  min-height: 100vh;
  display: flex; flex-direction: column;
  background: var(--mb-bg);
}
.mb-main {
  flex: 1; width: 100%; max-width: 1240px;
  margin: 0 auto; padding: 28px 24px 60px;
}
@media (max-width: 640px) {
  .mb-main { padding: 18px 14px 40px; }
}

/* ---------- Top nav ---------------------------------------------------- */
.mb-nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--mb-nav-bg);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--mb-border);
}
.mb-nav-inner {
  max-width: 1240px; margin: 0 auto;
  padding: 12px 24px;
  display: flex; align-items: center; gap: 18px;
}
.mb-nav-brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--mb-ink-blue);
  text-decoration: none; font-weight: 500;
  letter-spacing: 0.04em;
}
.mb-nav-brand:hover { color: var(--mb-ink-blue); }
.mb-nav-brand img { height: 26px; width: auto; }
.mb-nav-brand-text {
  font-family: var(--mb-font);
  font-size: 16px;
  font-weight: 500;
  color: var(--mb-ink-blue);
  letter-spacing: 0.08em;
}

.mb-nav-links {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0 0 0 16px; padding: 0;
}
.mb-nav-link {
  position: relative;
  display: inline-flex; align-items: center;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--mb-text-muted);
  text-decoration: none;
  font-size: 14.5px; font-weight: 500;
  transition: color 120ms var(--mb-ease), background 120ms var(--mb-ease);
}
.mb-nav-link:hover { color: var(--mb-ink); background: var(--mb-bg-hover); }
.mb-nav-link.is-active {
  color: var(--mb-ink-blue);
  background: rgba(31, 78, 138, 0.06);
}
.mb-nav-link.is-active::after {
  content: ""; position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px; border-radius: 2px;
  background: var(--mb-amber);
}

.mb-nav-spacer { flex: 1; }
.mb-nav-actions { display: flex; align-items: center; gap: 8px; }

.mb-nav-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--mb-text-muted);
  background: var(--mb-bg-subtle);
  border: 1px solid var(--mb-border);
  border-radius: var(--mb-radius-full);
  text-decoration: none;
  max-width: 240px;
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.mb-nav-chip:hover { color: var(--mb-ink); background: var(--mb-bg-hover); }

.mb-nav-user {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 8px 6px 10px;
  font-size: 13.5px;
  color: var(--mb-text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer; text-decoration: none;
}
.mb-nav-user:hover { background: var(--mb-bg-hover); color: var(--mb-ink); }

.mb-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--mb-ink-blue);
  color: #fff;
  font-size: 12px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  letter-spacing: 0.02em;
}

.mb-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--mb-border);
  border-radius: 10px;
  padding: 6px 10px;
  color: var(--mb-ink);
  cursor: pointer;
}
@media (max-width: 820px) {
  .mb-nav-links { display: none; }
  .mb-nav-toggle { display: inline-flex; }
}

/* ---------- Page header ------------------------------------------------ */
.mb-page-header {
  display: flex; align-items: end; justify-content: space-between;
  gap: 16px; margin-bottom: 22px;
}
.mb-page-title {
  font-family: var(--mb-font-serif);
  font-style: italic;
  font-size: 36px; font-weight: 400; letter-spacing: -0.015em;
  margin: 0;
  color: var(--mb-ink);
}
.mb-page-subtitle {
  color: var(--mb-text-muted);
  font-size: 14.5px;
  margin: 4px 0 0;
}

/* ---------- Hero ------------------------------------------------------- */
.mb-hero {
  position: relative; overflow: hidden;
  border-radius: var(--mb-radius-lg);
  padding: 32px 32px 28px;
  background:
    radial-gradient(60% 90% at 0% 0%, rgba(31, 78, 138, 0.10) 0%, transparent 60%),
    radial-gradient(50% 80% at 100% 100%, rgba(232, 183, 58, 0.12) 0%, transparent 60%),
    var(--mb-cream);
  border: 1px solid var(--mb-border);
  box-shadow: var(--mb-shadow);
}
.mb-hero h1 {
  font-family: var(--mb-font-serif);
  font-style: italic;
  font-size: 36px; font-weight: 400; letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0;
  color: var(--mb-ink);
}
.mb-hero h1 .mb-accent {
  font-style: italic;
  color: var(--mb-ink-blue);
}
.mb-hero p { color: var(--mb-text-muted); margin: 8px 0 0; }
.mb-hero-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

/* ---------- Cards ------------------------------------------------------ */
.mb-card {
  background: var(--mb-bg-elev);
  border: 1px solid var(--mb-border);
  border-radius: var(--mb-radius);
  box-shadow: var(--mb-shadow-sm);
  transition: box-shadow 160ms var(--mb-ease), transform 160ms var(--mb-ease), border-color 160ms var(--mb-ease);
}
.mb-card:hover { box-shadow: var(--mb-shadow); }
.mb-card-pad    { padding: 18px 20px; }
.mb-card-pad-lg { padding: 24px 26px; }
.mb-card-row    { display: flex; align-items: center; gap: 14px; }

.mb-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.mb-card-link:hover { transform: translateY(-1px); border-color: var(--mb-border-strong); color: inherit; }

.mb-card-title {
  font-size: 15.5px; font-weight: 600; letter-spacing: -0.005em;
  margin: 0 0 4px;
}
.mb-card-meta {
  font-size: 12.5px;
  color: var(--mb-text-faint);
}

/* ---------- Buttons ---------------------------------------------------- */
.mb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 16px;
  font-family: var(--mb-font);
  font-size: 14px; font-weight: 500;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 120ms var(--mb-ease), color 120ms var(--mb-ease),
              transform 60ms var(--mb-ease), border-color 120ms var(--mb-ease);
  white-space: nowrap;
}
.mb-btn:active { transform: translateY(1px); }
.mb-btn:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--mb-ring); }

.mb-btn--primary {
  background: var(--mb-ink-blue);
  color: #ffffff;
}
.mb-btn--primary:hover { background: var(--mb-brand-hover); color: #ffffff; }

/* "Gradient" CTA — kept as a name but the brand has no gradient.
   Use solid amber-on-ink instead. Amber is the highlighter. */
.mb-btn--gradient {
  background: var(--mb-amber);
  color: var(--mb-ink);
  border: 0;
  font-weight: 600;
}
.mb-btn--gradient:hover { background: #d6a428; color: var(--mb-ink); }

.mb-btn--ghost {
  background: transparent;
  color: var(--mb-ink);
  border-color: var(--mb-border);
}
.mb-btn--ghost:hover { background: var(--mb-bg-hover); border-color: var(--mb-border-strong); color: var(--mb-ink); }

.mb-btn--soft {
  background: var(--mb-bg-subtle);
  color: var(--mb-ink);
  border-color: var(--mb-border);
}
.mb-btn--soft:hover { background: var(--mb-bg-hover); color: var(--mb-ink); }

.mb-btn--danger { background: var(--mb-danger); color: #fff; }
.mb-btn--danger:hover { background: #821e1e; color: #fff; }

.mb-btn--sm   { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.mb-btn--lg   { padding: 12px 20px; font-size: 15px; border-radius: 12px; }
.mb-btn--icon { padding: 8px; }

/* ---------- Forms ------------------------------------------------------ */
.mb-input,
.mb-select,
.mb-textarea {
  display: block; width: 100%;
  font-family: var(--mb-font);
  font-size: 14.5px;
  padding: 10px 12px;
  color: var(--mb-ink);
  background: var(--mb-bg-elev);
  border: 1px solid var(--mb-border);
  border-radius: 10px;
  transition: border-color 120ms var(--mb-ease), box-shadow 120ms var(--mb-ease);
}
.mb-input:focus,
.mb-select:focus,
.mb-textarea:focus {
  outline: none;
  border-color: var(--mb-border-focus);
  box-shadow: 0 0 0 4px var(--mb-ring);
}
.mb-label {
  display: block;
  font-size: 13px; font-weight: 500;
  margin-bottom: 6px;
  color: var(--mb-ink);
}

/* ---------- Chips ------------------------------------------------------ */
.mb-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: var(--mb-radius-full);
  font-size: 12px; font-weight: 500;
  background: var(--mb-bg-subtle);
  color: var(--mb-text-muted);
  border: 1px solid var(--mb-border);
}
.mb-chip--success { color: var(--mb-success); background: var(--mb-success-bg); border-color: #b7dbb6; }
.mb-chip--warning { color: var(--mb-warning); background: var(--mb-warning-bg); border-color: var(--mb-amber-soft); }
.mb-chip--danger  { color: var(--mb-danger);  background: var(--mb-danger-bg);  border-color: #f0c4c0; }
.mb-chip--info    { color: var(--mb-info);    background: var(--mb-info-bg);    border-color: #c6d6ee; }

/* Amber "highlighter" chip — for "shared with you" / "bookmarked" badges */
.mb-chip--amber {
  color: var(--mb-ink);
  background: var(--mb-amber);
  border-color: #d4a128;
  font-weight: 600;
}

/* ---------- Alerts ----------------------------------------------------- */
.mb-alert {
  border: 1px solid var(--mb-border);
  background: var(--mb-bg-elev);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  margin-bottom: 14px;
}
.mb-alert--success { background: var(--mb-success-bg); border-color: #b7dbb6; color: var(--mb-success); }
.mb-alert--warning { background: var(--mb-warning-bg); border-color: var(--mb-amber-soft); color: var(--mb-warning); }
.mb-alert--danger  { background: var(--mb-danger-bg);  border-color: #f0c4c0; color: var(--mb-danger); }
.mb-alert--info    { background: var(--mb-info-bg);    border-color: #c6d6ee; color: var(--mb-info); }

/* ---------- Stacks + Grid --------------------------------------------- */
.mb-stack > * + * { margin-top: 12px; }
.mb-stack-lg > * + * { margin-top: 22px; }
.mb-grid { display: grid; gap: 16px; }
.mb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mb-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.mb-grid--main-side { grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; }
@media (max-width: 900px) {
  .mb-grid--main-side { grid-template-columns: 1fr; }
  .mb-grid--3, .mb-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .mb-grid--2, .mb-grid--3, .mb-grid--4 { grid-template-columns: 1fr; }
}

/* ---------- Right rail ------------------------------------------------- */
.mb-rail {
  position: sticky; top: 80px;
  align-self: start;
  display: flex; flex-direction: column; gap: 14px;
}
@media (max-width: 900px) {
  .mb-rail { position: static; }
}

/* ---------- Empty state ------------------------------------------------ */
.mb-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--mb-text-muted);
  border: 1px dashed var(--mb-border);
  border-radius: var(--mb-radius);
  background: var(--mb-bg-subtle);
}
.mb-empty h3 {
  color: var(--mb-ink);
  font-family: var(--mb-font-serif); font-style: italic;
  font-size: 18px; font-weight: 400;
  margin: 0 0 6px;
}

/* ---------- Amber highlighter (per brand) ----------------------------- */
.mb-highlight {
  background: linear-gradient(180deg, transparent 50%, var(--mb-amber-soft) 50%);
  padding: 0 2px;
}

/* ---------- Modal ---------------------------------------------------- */
.mb-modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: mbModalFade 140ms var(--mb-ease);
}
.mb-modal {
  background: var(--mb-bg-elev);
  border: 1px solid var(--mb-border);
  border-radius: var(--mb-radius-lg);
  box-shadow: var(--mb-shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 48px);
  overflow: hidden;
  display: flex; flex-direction: column;
  animation: mbModalIn 180ms var(--mb-ease);
}
.mb-modal-head {
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--mb-border);
  display: flex; align-items: center; justify-content: space-between;
}
.mb-modal-title {
  font-family: var(--mb-font-serif); font-style: italic;
  font-size: 22px; font-weight: 400; letter-spacing: -0.01em;
  color: var(--mb-text);
  margin: 0;
}
.mb-modal-close {
  background: transparent; border: 0;
  width: 32px; height: 32px;
  border-radius: 8px;
  color: var(--mb-text-muted);
  font-size: 18px;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.mb-modal-close:hover { background: var(--mb-bg-hover); color: var(--mb-text); }
.mb-modal-body { padding: 18px 22px; overflow-y: auto; }
.mb-modal-foot {
  padding: 14px 22px 18px;
  border-top: 1px solid var(--mb-border);
  display: flex; gap: 8px; justify-content: flex-end;
}
@keyframes mbModalFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes mbModalIn {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

/* ---------- Theme picker --------------------------------------------- */
.mb-theme-picker { display: flex; gap: 8px; flex-wrap: wrap; }
.mb-theme-picker input[type="radio"] {
  position: absolute; opacity: 0; pointer-events: none;
}
.mb-theme-card {
  display: flex; flex-direction: column; align-items: stretch;
  width: 76px;
  border: 1.5px solid var(--mb-border);
  border-radius: 10px;
  background: var(--mb-bg-elev);
  cursor: pointer;
  overflow: hidden;
  transition: border-color 120ms var(--mb-ease), transform 120ms var(--mb-ease), box-shadow 120ms var(--mb-ease);
}
.mb-theme-card:hover { border-color: var(--mb-border-strong); transform: translateY(-1px); }
.mb-theme-card-swatch {
  height: 36px;
  display: flex; align-items: stretch;
  border-bottom: 1px solid var(--mb-border);
}
.mb-theme-card-swatch > span { flex: 1; }
.mb-theme-card-label {
  padding: 6px 4px 7px;
  text-align: center;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--mb-text-muted);
}
.mb-theme-picker input[type="radio"]:checked + .mb-theme-card {
  border-color: var(--mb-brand-1);
  box-shadow: 0 0 0 3px var(--mb-ring);
}
.mb-theme-picker input[type="radio"]:checked + .mb-theme-card .mb-theme-card-label {
  color: var(--mb-text);
  font-weight: 600;
}

/* ==========================================================================
   Bootstrap 4 → 5 utility compat aliases (older templates use BS4 names).
   ========================================================================== */
.ml-0 { margin-left: 0 !important; }
.ml-1 { margin-left: 0.25rem !important; }
.ml-2 { margin-left: 0.5rem !important; }
.ml-3 { margin-left: 1rem !important; }
.ml-4 { margin-left: 1.5rem !important; }
.ml-5 { margin-left: 3rem !important; }
.ml-auto { margin-left: auto !important; }

.mr-0 { margin-right: 0 !important; }
.mr-1 { margin-right: 0.25rem !important; }
.mr-2 { margin-right: 0.5rem !important; }
.mr-3 { margin-right: 1rem !important; }
.mr-4 { margin-right: 1.5rem !important; }
.mr-5 { margin-right: 3rem !important; }
.mr-auto { margin-right: auto !important; }

.pl-0 { padding-left: 0 !important; }
.pl-1 { padding-left: 0.25rem !important; }
.pl-2 { padding-left: 0.5rem !important; }
.pl-3 { padding-left: 1rem !important; }
.pl-4 { padding-left: 1.5rem !important; }
.pl-5 { padding-left: 3rem !important; }

.pr-0 { padding-right: 0 !important; }
.pr-1 { padding-right: 0.25rem !important; }
.pr-2 { padding-right: 0.5rem !important; }
.pr-3 { padding-right: 1rem !important; }
.pr-4 { padding-right: 1.5rem !important; }
.pr-5 { padding-right: 3rem !important; }

.text-left { text-align: left !important; }
.text-right { text-align: right !important; }
.float-left { float: left !important; }
.float-right { float: right !important; }

.btn-block { display: block !important; width: 100% !important; }

.form-row { display: flex; flex-wrap: wrap; margin-right: -5px; margin-left: -5px; }
.form-row > [class*="col-"] { padding-right: 5px; padding-left: 5px; }
.form-group { margin-bottom: 1rem; }