/* ================================================================
   THEME-MODERN.CSS — Soft Modern Theme (replaces neo-brutalism)
   Grammar Strategies — Ayed Academy
   Loaded LAST (before interactive/engage/anim-explainer which
   inherit its tokens). Clean SaaS look: calm indigo palette,
   soft layered shadows, generous radii, airy surfaces.
   ================================================================ */

/* ── DESIGN TOKENS ── */
:root {
  /* Modern palette */
  --ink:          #0F172A;
  --primary:      #6366F1;
  --primary-deep: #4F46E5;
  --primary-soft: #818CF8;
  --primary-tint: #EEF2FF;
  --violet:       #3B82F6;
  --sky-c:        #0EA5E9;
  --sky-tint:     #E0F2FE;
  --emerald:      #10B981;
  --emerald-tint: #ECFDF5;
  --amber:        #F59E0B;
  --amber-tint:   #FEF3C7;
  --rose:         #EF4444;
  --rose-tint:    #FEF2F2;

  /* Remap the app's existing tokens */
  --navy:      #0F172A;
  --navy-mid:  #1E293B;
  --navy-soft: #16203A;
  --gold:      var(--primary);
  --gold-lt:   var(--primary-soft);
  --gold-dim:  rgba(99,102,241,0.10);
  --teal:      var(--sky-c);
  --teal-lt:   #7DD3FC;
  --green:     var(--emerald);
  --green-dim: rgba(16,185,129,0.10);
  --red:       var(--rose);
  --red-dim:   rgba(239,68,68,0.08);
  --purple:    var(--violet);
  --sky:       #38BDF8;

  --bg:        #F6F7FB;
  --surface:   #FFFFFF;
  --surface2:  #F8FAFC;
  --border:    rgba(15,23,42,0.08);
  --border-md: rgba(15,23,42,0.13);

  --text-primary: #0F172A;
  --text-sec:     #475569;
  --text-muted:   #64748B;
  --text-inv:     #FFFFFF;

  /* Generous modern radii */
  --r-xs:  6px;
  --r-sm:  10px;
  --r-md:  14px;
  --r-lg:  18px;
  --r-xl:  24px;
  --r-pill: 999px;

  /* Soft layered shadows */
  --sh-xs:  0 1px 2px rgba(15,23,42,0.05);
  --sh-sm:  0 1px 2px rgba(15,23,42,0.05), 0 4px 12px rgba(15,23,42,0.06);
  --sh-md:  0 2px 4px rgba(15,23,42,0.04), 0 10px 24px rgba(15,23,42,0.08);
  --sh-lg:  0 4px 8px rgba(15,23,42,0.04), 0 20px 48px rgba(15,23,42,0.12);
  --sh-xl:  0 8px 16px rgba(15,23,42,0.06), 0 32px 80px rgba(15,23,42,0.16);
  --sh-primary: 0 8px 24px rgba(99,102,241,0.30);

  --ease:   cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Legacy --nb-* tokens (still referenced from JS + late CSS) */
  --nb-black:   #0F172A;
  --nb-yellow:  #C7D2FE;   /* KPI tile — indigo tint */
  --nb-pink:    #A5B4FC;
  --nb-cyan:    #BAE6FD;
  --nb-lime:    #BBF7D0;
  --nb-orange:  #FDBA74;
  --nb-purple:  #8B5CF6;
  --nb-red:     #EF4444;
  --nb-green:   #10B981;
  --nb-cream:   #F6F7FB;
  --nb-paper:   #FFFFFF;
  --nb-bw:  1px;
  --nb-bw2: 1px;
}

/* ── GLOBAL FEEL ── */
body { background: var(--bg); }
::selection { background: rgba(99,102,241,0.22); color: var(--ink); }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(100,116,139,0.35); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(100,116,139,0.55); }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

@keyframes softIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: softIn 0.45s var(--ease) both; }

/* Content fills the whole available area (no narrow column) */
.page-content { max-width: none; padding: 2rem 2.5rem; }
@media (max-width: 1024px) { .page-content { padding: 1.5rem; } }
@media (max-width: 768px)  { .page-content { padding: 1rem; } }

/* ================================================================
   BUTTONS — soft, elevated
   ================================================================ */
.btn, .splash-cta, .bottom-btn, .notes-save-btn,
.quiz-submit-btn, .unit-end-cta button {
  border-radius: var(--r-md);
  font-weight: 700;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
              background 0.18s var(--ease), filter 0.18s;
}
.btn-primary, .splash-cta, .notes-save-btn,
.quiz-submit-btn, .unit-end-cta button {
  background: linear-gradient(135deg, var(--primary) 0%, var(--violet) 100%);
  color: #fff;
  box-shadow: var(--sh-primary);
}
.btn-primary:hover, .splash-cta:hover, .notes-save-btn:hover,
.quiz-submit-btn:hover, .unit-end-cta button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(99,102,241,0.40);
  filter: brightness(1.04);
}
.btn-primary:active, .splash-cta:active, .notes-save-btn:active,
.quiz-submit-btn:active, .unit-end-cta button:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(99,102,241,0.25);
}
.btn-secondary {
  background: var(--surface); color: var(--text-sec);
  border: 1px solid var(--border-md);
  box-shadow: var(--sh-xs);
}
.btn-secondary:hover { background: var(--surface2); border-color: var(--primary-soft); color: var(--primary-deep); }

/* ================================================================
   SPLASH / ONBOARDING — deep indigo night + glass card
   ================================================================ */
#splash {
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(59,130,246,0.25), transparent 60%),
    radial-gradient(900px 500px at 0% 110%, rgba(14,165,233,0.18), transparent 55%),
    linear-gradient(150deg, #0F172A 0%, #1E1B4B 55%, #312E81 100%);
}
.orb { border-radius: 50%; filter: blur(70px); border: 0; }
.o1 { background: rgba(99,102,241,0.30); }
.o2 { background: rgba(14,165,233,0.22); }
.o3 { background: rgba(59,130,246,0.20); }
.o4 { background: rgba(16,185,129,0.14); }

.splash-card {
  background: rgba(255,255,255,0.055);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-xl);
  box-shadow: 0 40px 100px rgba(2,6,23,0.55);
}
.splash-brand { color: #A5B4FC; text-shadow: none; }
.splash-brand-ar { color: rgba(255,255,255,0.55); }
.splash-headline { color: #fff; }
.splash-sub { color: rgba(255,255,255,0.62); }
.splash-book { filter: drop-shadow(0 8px 20px rgba(99,102,241,0.45)); }

.name-input {
  background: rgba(255,255,255,0.08);
  border: 1.5px solid rgba(255,255,255,0.16);
  border-radius: var(--r-md);
  color: #fff;
}
.name-input::placeholder { color: rgba(255,255,255,0.40); }
.name-input:focus {
  border-color: var(--primary-soft);
  box-shadow: 0 0 0 4px rgba(129,140,248,0.22);
  background: rgba(255,255,255,0.10);
}

.auth-tab {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  color: rgba(255,255,255,0.85);
  border-radius: var(--r-pill);
  padding: 0.5rem 1.2rem;
  font-weight: 700;
  transition: all 0.2s var(--ease);
}
.auth-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--violet));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 18px rgba(99,102,241,0.40);
}

.splash-stats-row { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 1.25rem; }
.s-stat { color: rgba(255,255,255,0.65); }
.s-stat span { color: #A5B4FC; }
.s-divider { background: rgba(255,255,255,0.14); width: 1px; }

.splash-video-wrap {
  margin: 0 0 1.5rem; border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--r-md); overflow: hidden;
  box-shadow: 0 16px 40px rgba(2,6,23,0.5);
  background: #000; position: relative;
}
.splash-video-wrap video, .splash-video-wrap iframe { display: block; width: 100%; aspect-ratio: 16/9; border: 0; }
.splash-video-badge {
  position: absolute; top: 10px; right: 10px;
  background: rgba(99,102,241,0.92); color: #fff;
  font-weight: 700; font-size: 0.65rem;
  padding: 3px 10px; border-radius: var(--r-pill); z-index: 2;
  backdrop-filter: blur(4px);
}

/* ================================================================
   TOPBAR — clean white bar
   ================================================================ */
.topbar {
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
.brand-name { color: var(--ink); }
.breadcrumb { color: var(--text-muted); }
#bc-unit {
  color: var(--primary-deep); background: var(--primary-tint);
  padding: 2px 10px; border-radius: var(--r-pill); font-weight: 700;
}
#bc-strat { color: var(--text-sec); }
.bc-sep { color: var(--text-muted); }

.icon-btn, .dark-toggle {
  background: var(--surface2);
  color: var(--text-sec);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: all 0.18s var(--ease);
}
.icon-btn:hover, .dark-toggle:hover {
  background: var(--primary-tint); color: var(--primary-deep);
  border-color: rgba(99,102,241,0.30); transform: none;
}
.student-chip {
  background: var(--surface2); color: var(--text-sec);
  border: 1px solid var(--border); border-radius: var(--r-pill);
}
.student-avatar {
  background: linear-gradient(135deg, var(--primary), var(--violet));
  color: #fff; border-radius: 50%;
}
.progress-pill { background: #E9EDF5; border-radius: var(--r-pill); }
.progress-fill { background: linear-gradient(90deg, var(--primary), var(--violet)); border-radius: var(--r-pill); }
.progress-label { color: var(--ink); }

/* XP / level / streak chips (injected by JS) */
.nb-xp-display {
  display: flex; align-items: center; gap: 6px;
  background: var(--primary-tint); color: var(--primary-deep);
  border: 1px solid rgba(99,102,241,0.20); border-radius: var(--r-pill);
  padding: 3px 10px; font-weight: 700; font-size: 0.8rem;
  white-space: nowrap;
}
.nb-lvl-badge {
  background: linear-gradient(135deg, var(--primary), var(--violet));
  color: #fff; border-radius: var(--r-pill);
  padding: 1px 8px; font-size: 0.72rem; letter-spacing: 0.3px;
}
.nb-xp-num { font-family: var(--ff-en); }
.nb-lvl-bar {
  width: 48px; height: 6px; background: rgba(99,102,241,0.15);
  border-radius: var(--r-pill); overflow: hidden; flex-shrink: 0;
}
.nb-lvl-bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--violet)); transition: width 0.6s var(--ease); }

.nb-streak-chip {
  display: flex; align-items: center; gap: 4px;
  background: #FFF7ED; color: #C2410C;
  border: 1px solid rgba(251,146,60,0.35); border-radius: var(--r-pill);
  padding: 3px 10px; font-weight: 700; font-size: 0.85rem;
}
@keyframes softPulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.12); } }
.nb-streak-chip.pulse { animation: softPulse 0.5s var(--spring); }

@media (max-width: 768px) {
  .nb-lvl-bar { display: none; }
  .nb-xp-display { font-size: 0.72rem; padding: 2px 8px; }
}

/* ================================================================
   SIDEBAR / UNITS NAV — light & airy
   ================================================================ */
.units-panel { background: var(--surface); border-left: 1px solid var(--border); }
.panel-head { border-bottom: 1px solid var(--border); }
.panel-title { color: var(--ink); }
.panel-progress-text { color: var(--primary-deep); font-weight: 700; }
.panel-progress-bar { background: #E9EDF5; height: 4px; }
.panel-progress-inner { background: linear-gradient(90deg, var(--primary), var(--violet)); }

.unit-nav-item { border-right: 3px solid transparent; }
.unit-nav-item:hover { background: var(--surface2); }
.unit-nav-item.active { background: var(--primary-tint); border-right-color: var(--primary); }
.unit-nav-num {
  background: var(--surface2); color: var(--text-muted);
  border: 1px solid var(--border);
}
.unit-nav-item.active .unit-nav-num { background: var(--primary); border-color: var(--primary); color: #fff; }
.unit-nav-item.completed .unit-nav-num { background: var(--emerald); border-color: var(--emerald); color: #fff; }
.unit-nav-ar { color: var(--text-primary); }
.unit-nav-en { color: var(--text-muted); }
.unit-nav-check { color: var(--emerald); }

.overall-bar-wrap { background: #E9EDF5; border-radius: var(--r-pill); height: 10px; }
.overall-bar-fill { background: linear-gradient(90deg, var(--primary), var(--violet)); border-radius: var(--r-pill); }
#sidebar-overall-lbl { color: var(--primary-deep) !important; }

/* ================================================================
   CONTENT — UNIT HEADER & STRATEGY CARDS
   ================================================================ */
.unit-header {
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--violet) 100%);
  border-radius: var(--r-xl);
  box-shadow: 0 20px 48px rgba(99,102,241,0.28);
}
.unit-header::before { display: none; }
.unit-header::after {
  background: radial-gradient(circle, rgba(255,255,255,0.14) 0%, transparent 70%);
}
.unit-tag {
  background: rgba(255,255,255,0.16); color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--r-pill);
}
.unit-h-title { color: #fff; text-shadow: none; }
.unit-h-en { color: rgba(255,255,255,0.70); }
.unit-h-mascot { filter: drop-shadow(0 10px 24px rgba(2,6,23,0.35)); }

.strategy-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              border-color 0.25s var(--ease);
}
.strategy-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-md);
  border-color: rgba(99,102,241,0.25);
}
.sc-header { border-bottom: 1px solid var(--border); }
.sc-badge { border-radius: var(--r-pill); }

/* Card theme headers — soft tinted, Notion-style */
.sc-theme-blue .sc-header   { background: var(--primary-tint); color: #3730A3; }
.sc-theme-blue .sc-subtitle { color: rgba(55,48,163,0.65); }
.sc-theme-blue .sc-badge    { background: rgba(99,102,241,0.14); color: #4338CA; }
.sc-theme-gold .sc-header   { background: var(--amber-tint); color: #92400E; }
.sc-theme-gold .sc-subtitle { color: rgba(146,64,14,0.65); }
.sc-theme-gold .sc-badge    { background: rgba(245,158,11,0.16); color: #92400E; }
.sc-theme-teal .sc-header   { background: var(--sky-tint); color: #075985; }
.sc-theme-teal .sc-subtitle { color: rgba(7,89,133,0.65); }
.sc-theme-teal .sc-badge    { background: rgba(14,165,233,0.14); color: #0369A1; }
.sc-theme-green .sc-header  { background: var(--emerald-tint); color: #065F46; }
.sc-theme-green .sc-subtitle{ color: rgba(6,95,70,0.65); }
.sc-theme-green .sc-badge   { background: rgba(16,185,129,0.14); color: #047857; }
.sc-theme-purple .sc-header { background: #F5F3FF; color: #5B21B6; }
.sc-theme-purple .sc-subtitle { color: rgba(91,33,182,0.65); }
.sc-theme-purple .sc-badge  { background: rgba(139,92,246,0.14); color: #6D28D9; }
.sc-theme-red .sc-header    { background: var(--rose-tint); color: #991B1B; }
.sc-theme-red .sc-subtitle  { color: rgba(153,27,27,0.65); }
.sc-theme-red .sc-badge     { background: rgba(239,68,68,0.12); color: #B91C1C; }

/* Keywords sidebar — light panel */
.sc-keywords { background: var(--surface2); border-left: 1px solid var(--border); }
.sc-keywords-title { color: var(--primary-deep); }
.kw-reveal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-sm); box-shadow: var(--sh-xs);
}
.kw-reveal:hover { border-color: rgba(99,102,241,0.30); }
.kw-en-box { color: var(--ink); }
.kw-en-box::after { color: var(--primary); }
.kw-reveal.expanded .kw-en-box::after { color: var(--rose); }
.kw-ar-box { background: var(--primary-tint); color: #4338CA; }
.kw-reveal.expanded .kw-ar-box { border-top: 1px dashed rgba(99,102,241,0.30); }
@media (max-width: 768px) {
  .sc-keywords { border-left: none; border-bottom: 1px solid var(--border); }
}

/* Usage banner */
.usage-banner {
  background: linear-gradient(135deg, rgba(14,165,233,0.07), rgba(14,165,233,0.02));
  border: 1px solid rgba(14,165,233,0.20);
  border-radius: var(--r-md); color: var(--text-sec);
}

/* Formula blocks */
.formula-v-title { color: var(--ink); }
.formula-block {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-md); box-shadow: var(--sh-xs);
}
.fb-subj { background: linear-gradient(135deg, var(--primary-deep), var(--violet)); border-left: 4px solid var(--primary-soft); }
.fb-form { background: rgba(14,165,233,0.05); color: var(--sky-c); }
.fb-form::before { color: var(--primary); background: var(--surface); border: 1px solid var(--border); }
.fb-ex strong { color: var(--ink); }
.fb-ex em { color: var(--violet); }

/* ================================================================
   RULE BOX — "قاعدة" callout (was .exception-box)
   Fixed rose/red theme regardless of the card's own accent color.
   ================================================================ */
.rule-box {
  background: linear-gradient(165deg, #FFF1F2 0%, var(--surface) 65%);
  border: 1px solid rgba(239,68,68,0.16);
  border-radius: var(--r-xl);
  padding: 1.3rem 1.4rem 1.5rem;
  margin-top: 0.5rem;
  box-shadow: var(--sh-sm);
}
.rule-box-header {
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  margin-bottom: 1.1rem;
}
.rule-box-title { font-weight: 800; font-size: 1.02rem; color: #9F1239; line-height: 1.4; }
.rule-box-lamp {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; background: #FFE4E9; box-shadow: var(--sh-xs);
}
.rule-box-rows { display: flex; flex-direction: column; gap: 0.6rem; }
.rule-row {
  display: flex; align-items: center; gap: 0.75rem;
  background: var(--surface); border: 1px solid rgba(15,23,42,0.06);
  border-radius: var(--r-md); padding: 0.65rem 0.95rem;
  box-shadow: var(--sh-xs);
}
.rule-row-icon {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; background: #FFE4E9;
}
.rule-row-text { flex: 1; font-size: 0.92rem; line-height: 1.6; color: var(--text-primary); }
.rule-row-text em { font-style: normal; font-weight: 700; color: var(--ink); border-bottom: 1.5px dashed var(--violet); padding-bottom: 1px; }
.rule-row-badge {
  flex-shrink: 0; font-family: var(--ff-en); font-weight: 800; font-size: 0.82rem;
  color: #fff; background: linear-gradient(135deg, #F43F5E, #FB7185);
  padding: 4px 14px; border-radius: var(--r-pill);
  box-shadow: 0 3px 8px rgba(244,63,94,0.35);
}

/* ================================================================
   MINI QUIZ / PRACTICE — "جرّب بنفسك!" (fixed violet theme)
   ================================================================ */
.mini-quiz-wrap {
  background: linear-gradient(165deg, #EFF6FF 0%, var(--surface) 60%);
  border: 1px solid rgba(59,130,246,0.18);
  border-radius: var(--r-xl);
  counter-reset: practice-item;
}
.mini-quiz-header { color: #1D4ED8; }
.mini-quiz-header span:first-child {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem; background: #DBEAFE;
}
.mini-quiz-header .mq-badge { background: linear-gradient(135deg, #2563EB, #60A5FA); color: #fff; }

.mini-quiz-wrap > .mini-q:not(.rd-split-wrap):not(.ls-split-wrap) {
  position: relative;
  counter-increment: practice-item;
  background: var(--surface);
  border: 1px solid rgba(59,130,246,0.15);
  border-radius: var(--r-lg);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--sh-xs);
}
.mini-quiz-wrap > .mini-q:not(.rd-split-wrap):not(.ls-split-wrap)::before {
  content: counter(practice-item);
  position: absolute; top: -10px; left: -10px; z-index: 2;
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.85rem; color: #fff;
  background: linear-gradient(135deg, #2563EB, #60A5FA);
  box-shadow: 0 3px 8px rgba(37,99,235,0.35);
}
.mini-q-text {
  background: var(--surface2); color: var(--ink);
  border-radius: var(--r-sm); border-left: 4px solid var(--violet);
  box-shadow: var(--sh-xs);
}
.mini-opt, .q-opt {
  background: var(--surface); border: 1.5px solid var(--border-md);
  border-radius: var(--r-sm); color: var(--text-primary);
  box-shadow: var(--sh-xs);
  transition: all 0.18s var(--ease);
}
.mini-opt:hover:not(:disabled), .q-opt:hover:not(:disabled) {
  border-color: var(--violet); background: #EFF6FF;
  transform: translateY(-2px); box-shadow: var(--sh-sm);
}
.mini-opt.selected, .q-opt.selected { border-color: var(--violet); background: #EFF6FF; }
.mini-opt.opt-correct, .q-opt.correct { border-color: var(--emerald); background: var(--emerald-tint); color: #065F46; text-decoration: none; }
.mini-opt.opt-wrong, .q-opt.wrong { border-color: var(--rose); background: var(--rose-tint); color: #991B1B; }
.opt-letter, .q-opt-letter { background: #DBEAFE; color: #1D4ED8; }
.mini-opt.opt-correct .opt-letter, .q-opt.correct .q-opt-letter { background: var(--emerald); color: #fff; }
.mini-opt.opt-wrong .opt-letter, .q-opt.wrong .q-opt-letter { background: var(--rose); color: #fff; }
.q-opt.selected:not(.correct):not(.wrong) .q-opt-letter { background: var(--violet); color: #fff; }
.mini-expl, .quiz-expl {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--r-md); color: var(--text-sec);
}
.btn-check-ans, .nb-check-fill {
  background: linear-gradient(135deg, #2563EB, #60A5FA) !important;
  color: #fff !important; border-radius: var(--r-pill) !important;
  box-shadow: 0 6px 16px rgba(37,99,235,0.30) !important;
}
/* !important below: interactive.css (indigo-toned nb-* rules) loads
   after this file, so equal-specificity overrides need it to win. */
.nb-fill-input:focus { border-color: var(--violet) !important; box-shadow: 0 0 0 4px rgba(59,130,246,0.14) !important; }
.nb-fill-blank { border-bottom-color: var(--violet) !important; color: #1D4ED8 !important; }
.nb-token {
  color: var(--text-primary) !important; background: var(--surface) !important;
  border: 1.5px solid var(--border-md) !important;
}
.nb-token:hover { border-color: var(--violet) !important; }
.nb-token.placed { background: #EFF6FF !important; color: #1D4ED8 !important; border-color: rgba(59,130,246,0.30) !important; }
.nb-order-answer { border-color: var(--border-md) !important; }
.nb-order-answer.correct { background: var(--emerald-tint) !important; border-color: var(--emerald) !important; }
.nb-order-answer.wrong { background: var(--rose-tint) !important; border-color: var(--rose) !important; }

/* Unit end CTA */
.unit-end-cta {
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--violet) 100%);
  border-radius: var(--r-xl);
  box-shadow: 0 20px 48px rgba(99,102,241,0.28);
}
.unit-end-cta::before { background: radial-gradient(ellipse at center, rgba(255,255,255,0.12) 0%, transparent 70%); }
.unit-end-cta h3 { color: #fff; }
.unit-end-cta p { color: rgba(255,255,255,0.70); }
.unit-end-cta button { background: #fff; color: var(--primary-deep); box-shadow: 0 10px 28px rgba(2,6,23,0.25); }
.unit-end-cta button:hover { box-shadow: 0 14px 36px rgba(2,6,23,0.3); filter: none; }

/* ================================================================
   BOTTOM NAV + TOOLBARS
   ================================================================ */
.bottom-nav { background: var(--surface); border-top: 1px solid var(--border); }
.bottom-btn { background: var(--surface2); color: var(--text-sec); border: 1px solid var(--border); }
.bottom-btn:hover { background: var(--primary-tint); color: var(--primary-deep); border-color: rgba(99,102,241,0.30); }
.bottom-btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--violet));
  color: #fff; border-color: transparent;
  box-shadow: 0 6px 18px rgba(99,102,241,0.30);
}
.bottom-unit-indicator {
  color: var(--primary-deep); background: var(--primary-tint);
  border-radius: var(--r-pill); padding: 3px 14px; font-weight: 700;
}

.right-toolbar { background: var(--surface); border-right: 1px solid var(--border); }
.mobile-toolbar { background: rgba(255,255,255,0.92); border-top: 1px solid var(--border); backdrop-filter: blur(14px); box-shadow: 0 -4px 20px rgba(15,23,42,0.06); }
.rtool-btn { color: var(--text-muted); border-radius: var(--r-sm); }
.rtool-btn:hover { background: var(--primary-tint); color: var(--primary-deep); }
.rtool-btn.active { background: var(--primary-tint); border-color: var(--primary); color: var(--primary-deep); }
.rtool-btn.active-eraser { background: var(--rose-tint); border-color: var(--rose); color: #B91C1C; }
.rtool-divider { background: var(--border); }

.fab-scroll {
  background: linear-gradient(135deg, var(--primary), var(--violet)) !important;
  color: #fff !important; border-radius: 50%;
  box-shadow: 0 10px 28px rgba(99,102,241,0.40) !important;
}
.fab-scroll:hover { transform: scale(1.08); box-shadow: 0 14px 36px rgba(99,102,241,0.50) !important; }

.mode-bar { background: var(--primary); color: #fff; }
.mode-bar.eraser { background: var(--rose); }

/* ================================================================
   NOTES + QUIZ MODAL
   ================================================================ */
.notes-panel { border-left: 1px solid var(--border); }
.notes-panel-head { border-bottom: 1px solid var(--border); }
.notes-unit-label { background: var(--primary-tint); color: var(--primary-deep); border-bottom: 1px solid var(--border); }
.notes-area { background: var(--surface2); }
.notes-saved-indicator { color: var(--emerald); }

.quiz-overlay { background: rgba(15,23,42,0.45); backdrop-filter: blur(8px); }
.quiz-modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); box-shadow: var(--sh-xl);
}
.quiz-modal-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.quiz-modal-title { color: var(--ink); }
.quiz-close-btn { color: var(--text-muted); }
.quiz-close-btn:hover { color: var(--ink); }
.quiz-unit-badge { color: var(--primary-deep); background: var(--primary-tint); }
.quiz-q-card { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--r-lg); }
.quiz-q-text { background: var(--surface); border-left: 4px solid var(--primary); box-shadow: var(--sh-xs); }
.quiz-modal-footer { border-top: 1px solid var(--border); }

/* Score screen */
.score-screen {
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--sh-lg);
}

/* Toast */
.toast { background: var(--ink); border-radius: var(--r-md); box-shadow: var(--sh-lg); }
.toast.t-success { background: var(--emerald); color: #fff; }
.toast.t-error { background: var(--rose); }

/* ================================================================
   DASHBOARD (Track selection)
   ================================================================ */
#main-dashboard {
  background:
    radial-gradient(800px 400px at 90% -5%, rgba(99,102,241,0.08), transparent 60%),
    radial-gradient(700px 400px at 5% 105%, rgba(14,165,233,0.06), transparent 55%),
    var(--bg);
}
.dash-logo { color: var(--primary-deep); text-shadow: none; }
.dash-title { color: var(--ink); }
.dash-subtitle { color: var(--text-sec); }
.dash-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); box-shadow: var(--sh-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              border-color 0.25s var(--ease);
}
.dash-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-md), 0 16px 40px rgba(99,102,241,0.14);
  border-color: rgba(99,102,241,0.30);
}
.dash-icon { border-radius: var(--r-lg); }
.dash-card:nth-child(4n+1) .dash-icon { background: var(--primary-tint); }
.dash-card:nth-child(4n+2) .dash-icon { background: var(--sky-tint); }
.dash-card:nth-child(4n+3) .dash-icon { background: var(--emerald-tint); }
.dash-card:nth-child(4n)   .dash-icon { background: var(--amber-tint); }
.dash-card h3 { color: var(--ink); }
.dash-card p { color: var(--text-sec); }
.dash-count-badge {
  background: var(--primary-tint); color: var(--primary-deep);
  border: 1px solid rgba(99,102,241,0.20); border-radius: var(--r-pill);
}
/* Analytics card injected on the dashboard (has inline styles) */
.analytics-card {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--r-lg) !important;
  box-shadow: var(--sh-sm);
  color: var(--text-primary);
}
.analytics-card h3 { color: var(--ink); }
.analytics-card .an-cat-label { color: var(--text-primary); }
.analytics-card .an-cat-percent { color: var(--text-muted); }
.analytics-card .an-track {
  width: 100%; height: 10px; border-radius: 5px; overflow: hidden;
  background: var(--surface2);
  border: 1px solid var(--border);
}
.analytics-card .an-advice {
  margin-top: 1.5rem; font-size: 0.95rem; line-height: 1.6; padding: 1rem;
  border-radius: 8px;
  background: var(--surface2);
  color: var(--text-sec);
  border: 1px solid var(--border);
}

/* ================================================================
   TRACK HEADERS (listening / reading)
   ================================================================ */
.ls-section-header {
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--violet) 100%);
  box-shadow: 0 12px 32px rgba(99,102,241,0.25);
  border-radius: var(--r-lg);
}
.rd-section-header {
  background: linear-gradient(135deg, #059669 0%, #10B981 100%);
  box-shadow: 0 12px 32px rgba(16,185,129,0.25);
  border-radius: var(--r-lg);
}
.ls-usage-box { background: var(--primary-tint); border-right-color: var(--primary); }
.ls-kw-row { background: rgba(99,102,241,0.06); }
.ls-radio-opt.selected .ls-radio-letter { background: var(--primary); color: #fff; }

/* ================================================================
   VIDEO COMPONENTS
   ================================================================ */
.nb-video-box {
  margin: 1rem 0; border: 1px solid var(--border);
  border-radius: var(--r-md); overflow: hidden;
  box-shadow: var(--sh-sm); background: #000; position: relative;
}
.nb-video-box video, .nb-video-box iframe { display: block; width: 100%; aspect-ratio: 16/9; border: 0; background: #000; }
.nb-video-label {
  position: absolute; top: 10px; right: 10px; z-index: 2;
  background: rgba(15,23,42,0.75); color: #fff;
  font-weight: 700; font-size: 0.7rem;
  padding: 3px 10px; border-radius: var(--r-pill);
  backdrop-filter: blur(4px);
}

/* Unit video library */
.nb-video-library {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); box-shadow: var(--sh-sm);
  padding: 1.5rem; margin: 1.5rem 0 2rem;
}
.nb-video-library-head {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--ink); font-weight: 800; font-size: 1.15rem; margin-bottom: 1.1rem;
}
.nb-video-library-head .nb-vl-badge {
  background: var(--primary-tint); color: var(--primary-deep);
  border-radius: var(--r-pill); padding: 3px 12px; font-size: 0.75rem;
}
.nb-video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 1.1rem; }
.nb-video-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-md); overflow: hidden; box-shadow: var(--sh-xs);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.nb-video-card:hover { transform: translateY(-3px); box-shadow: var(--sh-md); }
.nb-video-card .nb-video-box { margin: 0; border: 0; border-bottom: 1px solid var(--border); border-radius: 0; box-shadow: none; }
.nb-video-card-title { padding: 0.7rem 0.9rem; font-weight: 700; color: var(--ink); font-size: 0.95rem; }

/* ================================================================
   MOCK EXAM SHELL
   ================================================================ */
.mock-ui-container {
  position: fixed; inset: 0; z-index: 1500;
  background: var(--bg); display: flex; flex-direction: column;
}
.mock-header {
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 0.85rem 1.5rem; display: flex; align-items: center;
  justify-content: space-between; gap: 1rem; box-shadow: var(--sh-xs);
}
#mock-timer {
  font-family: var(--ff-en); font-weight: 800; font-size: 1.1rem;
  color: var(--primary-deep); background: var(--primary-tint);
  padding: 4px 16px; border-radius: var(--r-pill);
}
.mock-content { flex: 1; overflow-y: auto; padding: 2rem 1.5rem; width: 100%; max-width: 920px; margin: 0 auto; }

/* ================================================================
   DARK MODE — elegant night variant
   ================================================================ */
body.dark-mode {
  --bg:        #0B1220;
  --surface:   #121A2C;
  --surface2:  #182238;
  --border:    rgba(148,163,184,0.14);
  --border-md: rgba(148,163,184,0.22);
  --ink:          #E7ECF5;
  --text-primary: #E7ECF5;
  --text-sec:     #A9B4C7;
  --text-muted:   #7C8AA0;
  --gold:      #818CF8;
  --gold-lt:   #A5B4FC;
  --gold-dim:  rgba(129,140,248,0.14);
  --green:     #34D399;
  --red:       #F87171;
  --teal:      #38BDF8;
  --primary-tint: rgba(129,140,248,0.14);
  --sky-tint:     rgba(56,189,248,0.12);
  --emerald-tint: rgba(52,211,153,0.12);
  --amber-tint:   rgba(251,191,36,0.12);
  --rose-tint:    rgba(248,113,113,0.10);
  --sh-xs: 0 1px 2px rgba(0,0,0,0.4);
  --sh-sm: 0 2px 6px rgba(0,0,0,0.45);
  --sh-md: 0 8px 24px rgba(0,0,0,0.5);
  --sh-lg: 0 20px 48px rgba(0,0,0,0.55);
  --sh-xl: 0 32px 80px rgba(0,0,0,0.6);
  /* legacy nb tokens in the dark */
  --nb-black:  #E7ECF5;
  --nb-cream:  #0B1220;
  --nb-paper:  #121A2C;
  --nb-yellow: rgba(129,140,248,0.20);
  --nb-cyan:   rgba(56,189,248,0.18);
  --nb-orange: rgba(251,146,60,0.22);
  --nb-lime:   rgba(52,211,153,0.18);
  --nb-pink:   #818CF8;
  --nb-red:    #F87171;
  --nb-green:  #34D399;
  --nb-purple: #A78BFA;
}
body.dark-mode { background: var(--bg) !important; }
body.dark-mode .topbar { background: rgba(13,20,36,0.88); border-bottom: 1px solid var(--border); box-shadow: none; }
body.dark-mode .brand-name, body.dark-mode .quiz-modal-title { color: var(--ink); }
body.dark-mode .icon-btn, body.dark-mode .dark-toggle,
body.dark-mode .student-chip { background: var(--surface2); color: var(--text-sec); border-color: var(--border); }
body.dark-mode #bc-unit { background: var(--primary-tint); color: #A5B4FC; }
body.dark-mode .progress-pill { background: rgba(148,163,184,0.14); }
body.dark-mode .progress-label { color: #fff; }

body.dark-mode .units-panel { background: #0E1626; border-left: 1px solid var(--border); }
body.dark-mode .unit-nav-item:hover { background: rgba(148,163,184,0.06); }
body.dark-mode .unit-nav-item.active { background: var(--primary-tint); border-right-color: #818CF8; }
body.dark-mode .unit-nav-num { background: var(--surface2); color: var(--text-muted); border-color: var(--border); }
body.dark-mode .unit-nav-item.active .unit-nav-num { background: #6366F1; color: #fff; }
body.dark-mode .unit-nav-ar { color: var(--text-primary); }
body.dark-mode .panel-title { color: var(--ink); }
body.dark-mode .panel-progress-text, body.dark-mode #sidebar-overall-lbl { color: #A5B4FC !important; }
body.dark-mode .panel-progress-bar, body.dark-mode .overall-bar-wrap { background: rgba(148,163,184,0.14); }

body.dark-mode .content-area { background: var(--bg); }
body.dark-mode .strategy-card { background: var(--surface); border-color: var(--border); box-shadow: var(--sh-sm); }
body.dark-mode .sc-theme-blue .sc-header   { background: rgba(99,102,241,0.14); color: #C7D2FE; }
body.dark-mode .sc-theme-blue .sc-subtitle { color: rgba(199,210,254,0.6); }
body.dark-mode .sc-theme-gold .sc-header   { background: rgba(251,191,36,0.12); color: #FCD34D; }
body.dark-mode .sc-theme-gold .sc-subtitle { color: rgba(252,211,77,0.6); }
body.dark-mode .sc-theme-teal .sc-header   { background: rgba(56,189,248,0.12); color: #7DD3FC; }
body.dark-mode .sc-theme-teal .sc-subtitle { color: rgba(125,211,252,0.6); }
body.dark-mode .sc-theme-green .sc-header  { background: rgba(52,211,153,0.12); color: #6EE7B7; }
body.dark-mode .sc-theme-green .sc-subtitle{ color: rgba(110,231,183,0.6); }
body.dark-mode .sc-theme-purple .sc-header { background: rgba(167,139,250,0.12); color: #C4B5FD; }
body.dark-mode .sc-theme-purple .sc-subtitle { color: rgba(196,181,253,0.6); }
body.dark-mode .sc-theme-red .sc-header    { background: rgba(248,113,113,0.10); color: #FCA5A5; }
body.dark-mode .sc-theme-red .sc-subtitle  { color: rgba(252,165,165,0.6); }
body.dark-mode .sc-theme-blue .sc-badge, body.dark-mode .sc-theme-gold .sc-badge,
body.dark-mode .sc-theme-teal .sc-badge, body.dark-mode .sc-theme-green .sc-badge,
body.dark-mode .sc-theme-purple .sc-badge, body.dark-mode .sc-theme-red .sc-badge {
  background: rgba(148,163,184,0.14); color: var(--text-sec);
}
body.dark-mode .sc-keywords { background: #0E1626; border-color: var(--border); }
body.dark-mode .kw-reveal { background: var(--surface); border-color: var(--border); }
body.dark-mode .kw-en-box { color: var(--ink); }
body.dark-mode .kw-ar-box { background: var(--primary-tint); color: #C7D2FE; }

body.dark-mode .formula-block { background: var(--surface); border-color: var(--border); }
body.dark-mode .fb-subj { background: linear-gradient(135deg, #4F46E5, #3B82F6); }
body.dark-mode .fb-form { background: rgba(56,189,248,0.08); color: #7DD3FC; border-color: var(--border); }
body.dark-mode .fb-form::before { background: var(--surface); border-color: var(--border); }
body.dark-mode .fb-ex { color: var(--text-sec); }
body.dark-mode .fb-ex strong { color: var(--ink); }

body.dark-mode .mini-quiz-wrap { background: rgba(96,165,250,0.06); border-color: rgba(96,165,250,0.28); }
body.dark-mode .mini-quiz-header { color: #93C5FD; }
body.dark-mode .mini-quiz-header span:first-child { background: rgba(96,165,250,0.16); }
body.dark-mode .mini-quiz-wrap > .mini-q:not(.rd-split-wrap):not(.ls-split-wrap) {
  background: var(--surface2); border-color: rgba(96,165,250,0.22);
}
body.dark-mode .mini-q-text { background: var(--surface); color: var(--ink); }
body.dark-mode .mini-opt, body.dark-mode .q-opt { background: var(--surface2); color: var(--text-primary); border-color: var(--border-md); }
body.dark-mode .mini-opt:hover:not(:disabled), body.dark-mode .q-opt:hover:not(:disabled) {
  background: rgba(96,165,250,0.14); border-color: #60A5FA; color: var(--ink);
}
body.dark-mode .mini-opt.opt-correct, body.dark-mode .q-opt.correct { background: rgba(52,211,153,0.14); border-color: #34D399; color: #6EE7B7; }
body.dark-mode .mini-opt.opt-wrong, body.dark-mode .q-opt.wrong { background: rgba(248,113,113,0.12); border-color: #F87171; color: #FCA5A5; }
body.dark-mode .opt-letter, body.dark-mode .q-opt-letter { background: rgba(96,165,250,0.20); color: #93C5FD; }
body.dark-mode .nb-token { background: var(--surface2); border-color: var(--border-md); color: var(--text-primary); }
body.dark-mode .nb-token.placed { background: rgba(96,165,250,0.16); color: #93C5FD; border-color: rgba(96,165,250,0.30); }
body.dark-mode .mini-expl, body.dark-mode .quiz-expl { background: var(--surface2); border-color: var(--border); color: var(--text-sec); }
body.dark-mode .usage-banner { background: rgba(56,189,248,0.07); border-color: rgba(56,189,248,0.2); color: var(--text-sec); }
body.dark-mode .rule-box { background: rgba(248,113,113,0.07); border-color: rgba(248,113,113,0.18); }
body.dark-mode .rule-box-title { color: #FCA5A5; }
body.dark-mode .rule-box-lamp, body.dark-mode .rule-row-icon { background: rgba(248,113,113,0.16); }
body.dark-mode .rule-row { background: var(--surface2); border-color: var(--border); }
body.dark-mode .rule-row-text { color: var(--text-sec); }
body.dark-mode .rule-row-text em { color: var(--ink); }

body.dark-mode .bottom-nav { background: #0D1424; border-top: 1px solid var(--border); }
body.dark-mode .bottom-btn { background: var(--surface2); color: var(--text-sec); border-color: var(--border); }
body.dark-mode .bottom-unit-indicator { background: var(--primary-tint); color: #A5B4FC; }
body.dark-mode .right-toolbar { background: #0D1424; border-color: var(--border); }
body.dark-mode .mobile-toolbar { background: rgba(13,20,36,0.94); border-top-color: var(--border); }
body.dark-mode .rtool-btn:hover { background: var(--primary-tint); color: #A5B4FC; }

body.dark-mode .notes-panel { background: var(--surface); }
body.dark-mode .notes-area { background: #0E1626; color: var(--text-primary); }
body.dark-mode .notes-unit-label { background: var(--primary-tint); color: #A5B4FC; }

body.dark-mode .quiz-modal { background: var(--surface); border-color: var(--border); }
body.dark-mode .quiz-modal-header { background: var(--surface); border-bottom-color: var(--border); }
body.dark-mode .quiz-q-card { background: var(--surface2); border-color: var(--border); }
body.dark-mode .quiz-q-text { background: var(--surface); color: var(--ink); }
body.dark-mode .score-screen { background: var(--surface); border-color: var(--border); }

body.dark-mode #main-dashboard {
  background:
    radial-gradient(800px 400px at 90% -5%, rgba(129,140,248,0.10), transparent 60%),
    var(--bg) !important;
}
body.dark-mode .dash-card { background: var(--surface); border-color: var(--border); }
body.dark-mode .dash-card h3 { color: var(--ink); }
body.dark-mode .dash-logo { color: #A5B4FC; }
body.dark-mode .dash-title { color: var(--ink); }
body.dark-mode .dash-card:nth-child(4n+1) .dash-icon { background: rgba(129,140,248,0.14); }
body.dark-mode .dash-card:nth-child(4n+2) .dash-icon { background: rgba(56,189,248,0.12); }
body.dark-mode .dash-card:nth-child(4n+3) .dash-icon { background: rgba(52,211,153,0.12); }
body.dark-mode .dash-card:nth-child(4n)   .dash-icon { background: rgba(251,191,36,0.12); }
body.dark-mode .analytics-card { background: var(--surface) !important; border-color: var(--border) !important; }
body.dark-mode .analytics-card h3 { color: var(--ink); }
body.dark-mode .analytics-card .an-track { background: rgba(255,255,255,0.1); border-color: var(--border); }
body.dark-mode .analytics-card .an-advice { background: rgba(255,255,255,0.05); color: var(--text-sec); }

body.dark-mode .nb-video-library, body.dark-mode .nb-video-card { background: var(--surface); border-color: var(--border); }
body.dark-mode .nb-video-library-head, body.dark-mode .nb-video-card-title { color: var(--ink); }
body.dark-mode .mock-header { background: var(--surface); border-color: var(--border); }

/* ================================================================
   MOBILE / TOUCH TWEAKS
   ================================================================ */
@media (hover: none) {
  .mini-opt:hover:not(:disabled), .q-opt:hover:not(:disabled),
  .strategy-card:hover, .dash-card:hover { transform: none; }
}

/* ================================================================
   HIGHLIGHTER 2.0 — marks, selection bubble & floating mode bar
   ================================================================ */
.content-area { position: relative; }

/* Selection tint inside the lesson page */
#page-content ::selection { background: rgba(99,102,241,0.22); }
#page-content.hl-mode { cursor: text; }
#page-content.hl-mode ::selection { background: rgba(251,191,36,0.55); color: #292524; }

/* ── Highlight marks (marker-pen look) ── */
.gs-hl {
  border-radius: 0.4em;
  padding: 0.06em 0.22em;
  margin: 0 -0.04em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  background: linear-gradient(100deg,
    rgba(251,191,36,0.14) 0%, rgba(251,191,36,0.44) 6%,
    rgba(251,191,36,0.44) 94%, rgba(251,191,36,0.14) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(217,119,6,0.25);
  transition: background 0.25s ease, box-shadow 0.25s ease;
  cursor: pointer;
}
.gs-hl-green {
  background: linear-gradient(100deg,
    rgba(52,211,153,0.12) 0%, rgba(52,211,153,0.38) 6%,
    rgba(52,211,153,0.38) 94%, rgba(52,211,153,0.12) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(5,150,105,0.25);
}
.gs-hl-rose {
  background: linear-gradient(100deg,
    rgba(251,113,133,0.12) 0%, rgba(251,113,133,0.32) 6%,
    rgba(251,113,133,0.32) 94%, rgba(251,113,133,0.12) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(225,29,72,0.22);
}
.gs-hl-blue {
  background: linear-gradient(100deg,
    rgba(96,165,250,0.12) 0%, rgba(96,165,250,0.34) 6%,
    rgba(96,165,250,0.34) 94%, rgba(96,165,250,0.12) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(37,99,235,0.22);
}

/* Pop pulse when a mark is created / recolored */
@keyframes gsHlPop {
  0%   { box-shadow: 0 0 0 0 rgba(251,191,36,0.55), inset 0 -0.14em 0 rgba(217,119,6,0.25); }
  100% { box-shadow: 0 0 0 0.6em rgba(251,191,36,0), inset 0 -0.14em 0 rgba(217,119,6,0.25); }
}
.gs-hl-new { animation: gsHlPop 0.55s ease-out; }

/* Eraser-mode affordance */
#page-content.eraser-mode { cursor: crosshair; }
#page-content.eraser-mode .gs-hl:hover,
#page-content.eraser-mode span[style*="background"]:hover {
  background: rgba(244,63,94,0.16) !important;
  box-shadow: 0 0 0 2px rgba(244,63,94,0.45);
  text-decoration: line-through;
  text-decoration-color: rgba(190,18,60,0.55);
  cursor: pointer;
}

/* ── Floating mode bar (pill) ── */
.mode-bar {
  position: absolute; top: 14px; left: 50%;
  transform: translateX(-50%);
  width: max-content; max-width: calc(100% - 2rem);
  border-radius: 999px;
  padding: 8px 10px 8px 18px;
  display: flex; align-items: center; gap: 14px;
  background: linear-gradient(135deg, #F59E0B, #FBBF24);
  color: #451A03;
  font-weight: 800; font-size: 0.88rem;
  box-shadow: 0 10px 26px rgba(180,83,9,0.35);
  z-index: 40;
  animation: modeBarIn 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mode-bar.hidden { display: none; }
.mode-bar.eraser {
  background: linear-gradient(135deg, #E11D48, #FB7185);
  color: #fff;
  box-shadow: 0 10px 26px rgba(190,18,60,0.35);
}
.mode-bar svg { width: 16px; height: 16px; vertical-align: -3px; }
.mode-bar-close {
  width: 26px; height: 26px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; color: inherit; opacity: 0.75;
  background: rgba(255,255,255,0.3);
  transition: opacity 0.15s, transform 0.15s;
}
.mode-bar-close:hover { opacity: 1; transform: scale(1.1); }
@keyframes modeBarIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-14px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Floating selection bubble ── */
.hl-popup {
  position: fixed; z-index: 1300;
  display: flex; align-items: center; gap: 7px;
  background: #1E293B;
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 999px;
  padding: 7px 10px;
  box-shadow: 0 12px 32px rgba(2,6,23,0.4);
  opacity: 0; pointer-events: none;
  transform: translateY(6px) scale(0.92);
  transition: opacity 0.16s ease, transform 0.16s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.hl-popup.show { opacity: 1; pointer-events: auto; transform: none; }
.hl-popup::after {
  content: '';
  position: absolute; bottom: -5px; left: var(--arrow-x, 50%);
  width: 10px; height: 10px;
  margin-left: -5px;
  background: #1E293B;
  border-radius: 2px;
  transform: rotate(45deg);
}
.hl-popup.below::after { bottom: auto; top: -5px; }
.hl-swatch {
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.28);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.hl-swatch:hover { transform: scale(1.18); border-color: #fff; box-shadow: 0 0 0 3px rgba(255,255,255,0.12); }
.hl-swatch.gold  { background: #FBBF24; }
.hl-swatch.green { background: #34D399; }
.hl-swatch.rose  { background: #FB7185; }
.hl-swatch.blue  { background: #60A5FA; }
.hl-pop-sep { width: 1px; height: 20px; background: rgba(255,255,255,0.16); }
.hl-pop-erase {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #FDA4AF; cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.hl-pop-erase:hover { background: rgba(244,63,94,0.22); transform: scale(1.12); }
.hl-pop-erase svg { width: 16px; height: 16px; }

/* Dark mode */
body.dark-mode .gs-hl {
  background: linear-gradient(100deg,
    rgba(251,191,36,0.16) 0%, rgba(251,191,36,0.32) 6%,
    rgba(251,191,36,0.32) 94%, rgba(251,191,36,0.16) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(251,191,36,0.35);
}
body.dark-mode .gs-hl-green {
  background: linear-gradient(100deg,
    rgba(52,211,153,0.14) 0%, rgba(52,211,153,0.28) 6%,
    rgba(52,211,153,0.28) 94%, rgba(52,211,153,0.14) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(52,211,153,0.35);
}
body.dark-mode .gs-hl-rose {
  background: linear-gradient(100deg,
    rgba(251,113,133,0.14) 0%, rgba(251,113,133,0.26) 6%,
    rgba(251,113,133,0.26) 94%, rgba(251,113,133,0.14) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(251,113,133,0.35);
}
body.dark-mode .gs-hl-blue {
  background: linear-gradient(100deg,
    rgba(96,165,250,0.14) 0%, rgba(96,165,250,0.28) 6%,
    rgba(96,165,250,0.28) 94%, rgba(96,165,250,0.14) 100%);
  box-shadow: inset 0 -0.14em 0 rgba(96,165,250,0.35);
}
body.dark-mode #page-content.hl-mode ::selection { background: rgba(251,191,36,0.6); color: #1C1917; }

/* Touch tweaks */
@media (max-width: 768px) {
  .mode-bar { top: 10px; font-size: 0.8rem; padding: 7px 8px 7px 14px; gap: 10px; }
  .hl-popup { padding: 8px 12px; gap: 10px; }
  .hl-swatch { width: 30px; height: 30px; }
  .hl-pop-erase { width: 32px; height: 32px; }
}