/* ═══════════════════════════════════════════════════════════
   DS251 Fundamentals of Management — Shared Stylesheet
   Used by: Managment/index.html and Managment/chapters/*.html
═══════════════════════════════════════════════════════════ */

:root{
  --bg:#070c18; --bg2:#0b1120; --card:#0f172a; --card2:#141e33;
  --border:#1e3a5f; --border2:#253650;
  --cyan:#00d4ff; --cyan2:#0ea5e9; --amber:#f59e0b; --green:#10b981;
  --red:#ef4444; --purple:#8b5cf6; --pink:#f472b6; --teal:#14b8a6;
  --t1:#e2e8f0; --t2:#94a3b8; --t3:#64748b;
  --code:#0d1117; --fw:280px;
  --fh:'Outfit',sans-serif; --fb:'DM Sans','Noto Sans Arabic',sans-serif; --fc:'Fira Code',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--t1);font-family:var(--fb);line-height:1.75;overflow-x:hidden;direction:ltr}

/* ─── PROGRESS BAR ─── */
#prog-bar{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--pink),var(--purple),var(--amber));z-index:9999;transition:width .2s;width:0}

/* ─── SIDEBAR ─── */
#sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--fw);background:var(--bg2);border-right:1px solid var(--border);overflow-y:auto;z-index:100;padding:20px 0;transition:.3s}
#sidebar::-webkit-scrollbar{width:4px}
#sidebar::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}
.sb-logo{padding:12px 20px 20px;border-bottom:1px solid var(--border);margin-bottom:16px}
.sb-logo h2{font-family:var(--fh);font-size:1.1rem;color:var(--pink);font-weight:700}
.sb-logo p{font-size:.72rem;color:var(--t3);margin-top:3px}
.sb-section{padding:6px 20px 2px;font-size:.65rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--t3);margin-top:10px}
.sb-link{display:flex;align-items:center;gap:10px;padding:8px 20px;font-size:.82rem;color:var(--t2);text-decoration:none;transition:.2s;border-inline-start:3px solid transparent;position:relative}
.sb-link:hover,.sb-link.active{color:var(--t1);background:rgba(244,114,182,.06);border-inline-start-color:var(--pink)}
.sb-dot{width:7px;height:7px;border-radius:50%;background:var(--border2);flex-shrink:0;transition:.2s}
.sb-link.active .sb-dot,.sb-link:hover .sb-dot{background:var(--pink)}
.sb-back{display:flex;align-items:center;gap:8px;margin:10px 16px 16px;padding:8px 12px;border:1px solid var(--border);border-radius:8px;color:var(--t2);font-size:.75rem;text-decoration:none;transition:.2s}
.sb-back:hover{border-color:var(--pink);color:var(--pink)}

/* ─── MAIN ─── */
#main{margin-left:var(--fw);padding:0 0 80px}

/* ─── HERO ─── */
.hero{background:linear-gradient(135deg,#060d1e 0%,#0a1628 40%,#1a0a28 100%);padding:70px 60px 60px;position:relative;overflow:hidden;border-bottom:1px solid var(--border)}
.hero::before{content:'';position:absolute;top:-100px;right:-100px;width:500px;height:500px;background:radial-gradient(circle,rgba(244,114,182,.08) 0%,transparent 70%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-50px;left:200px;width:300px;height:300px;background:radial-gradient(circle,rgba(139,92,246,.06) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(244,114,182,.08);border:1px solid rgba(244,114,182,.2);border-radius:20px;padding:5px 14px;font-size:.75rem;color:var(--pink);margin-bottom:20px;font-family:var(--fc)}
.hero h1{font-family:var(--fh);font-size:2.8rem;font-weight:800;line-height:1.15;margin-bottom:14px}
.hero h1 span{background:linear-gradient(135deg,var(--pink),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{color:var(--t2);max-width:700px;font-size:1rem}
.hero-stats{display:flex;gap:30px;margin-top:30px;flex-wrap:wrap}
.hstat{text-align:center}
.hstat .num{font-family:var(--fh);font-size:1.8rem;font-weight:700;color:var(--pink)}
.hstat .lbl{font-size:.72rem;color:var(--t3);margin-top:2px}

/* ─── CONTENT ─── */
.content{padding:40px 60px}
.chapter{margin-bottom:80px}

/* ─── CHAPTER HEADER ─── */
.ch-header{display:flex;align-items:center;gap:16px;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.ch-num{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-family:var(--fh);font-weight:700;font-size:1rem;flex-shrink:0}
.ch-num.blue{background:rgba(0,212,255,.12);color:var(--cyan);border:1px solid rgba(0,212,255,.25)}
.ch-num.purple{background:rgba(139,92,246,.12);color:var(--purple);border:1px solid rgba(139,92,246,.25)}
.ch-num.amber{background:rgba(245,158,11,.12);color:var(--amber);border:1px solid rgba(245,158,11,.25)}
.ch-num.green{background:rgba(16,185,129,.12);color:var(--green);border:1px solid rgba(16,185,129,.25)}
.ch-num.pink{background:rgba(244,114,182,.12);color:var(--pink);border:1px solid rgba(244,114,182,.25)}
.ch-num.red{background:rgba(239,68,68,.12);color:var(--red);border:1px solid rgba(239,68,68,.25)}
.ch-num.teal{background:rgba(20,184,166,.12);color:var(--teal);border:1px solid rgba(20,184,166,.25)}
.ch-title h2{font-family:var(--fh);font-size:1.6rem;font-weight:700}
.ch-title p{color:var(--t3);font-size:.85rem;margin-top:3px}

/* ─── TOPIC CARD ─── */
.topic{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px 28px;margin-bottom:20px;position:relative;overflow:hidden;transition:.25s}
.topic::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent,var(--pink)),transparent);opacity:.6}
.topic:hover{border-color:var(--border2);transform:translateY(-1px)}
.topic-title{font-family:var(--fh);font-size:1.05rem;font-weight:600;margin-bottom:10px;color:var(--t1);display:flex;align-items:center;gap:10px}
.topic-title .icon{font-size:1.1rem}
.topic p{color:var(--t2);font-size:.9rem;margin-bottom:10px}
.topic p:last-child{margin-bottom:0}
.topic ul,.topic ol{padding-inline-start:22px;color:var(--t2);font-size:.9rem;margin:8px 0}
.topic ul li,.topic ol li{margin-bottom:4px}

/* ─── GRIDS ─── */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}

/* ─── INLINE CODE ─── */
code{font-family:var(--fc);background:rgba(244,114,182,.08);color:var(--pink);padding:2px 7px;border-radius:4px;font-size:.82em;direction:ltr;unicode-bidi:isolate;display:inline-block}

/* ─── INFO BOXES ─── */
.tip,.warn,.info,.danger{display:flex;gap:12px;padding:14px 16px;border-radius:10px;margin:14px 0;font-size:.87rem;justify-content:flex-end}
.tip{background:rgba(16,185,129,.08);border-inline-start:3px solid var(--green);color:#6ee7b7}
.warn{background:rgba(245,158,11,.08);border-inline-start:3px solid var(--amber);color:#fcd34d}
.info{background:rgba(244,114,182,.08);border-inline-start:3px solid var(--pink);color:#fbcfe8}
.danger{background:rgba(239,68,68,.08);border-inline-start:3px solid var(--red);color:#fca5a5}
.tip b,.warn b,.info b,.danger b{display:block;margin-bottom:3px;font-weight:600}

/* ─── TABLE ─── */
.tbl{width:100%;border-collapse:collapse;margin:14px 0;font-size:.85rem}
.tbl th{background:var(--card2);color:var(--pink);font-family:var(--fh);font-weight:600;padding:10px 14px;text-align:start;border-bottom:2px solid var(--border)}
.tbl td{padding:9px 14px;border-bottom:1px solid var(--border);color:var(--t2);vertical-align:top}
.tbl tr:hover td{background:rgba(255,255,255,.02)}

/* ─── BADGES ─── */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:.72rem;font-weight:600;font-family:var(--fc)}
.badge-cyan{background:rgba(0,212,255,.1);color:var(--cyan);border:1px solid rgba(0,212,255,.2)}
.badge-green{background:rgba(16,185,129,.1);color:var(--green);border:1px solid rgba(16,185,129,.2)}
.badge-amber{background:rgba(245,158,11,.1);color:var(--amber);border:1px solid rgba(245,158,11,.2)}
.badge-red{background:rgba(239,68,68,.1);color:var(--red);border:1px solid rgba(239,68,68,.2)}
.badge-purple{background:rgba(139,92,246,.1);color:var(--purple);border:1px solid rgba(139,92,246,.2)}
.badge-pink{background:rgba(244,114,182,.1);color:var(--pink);border:1px solid rgba(244,114,182,.2)}
.badge-teal{background:rgba(20,184,166,.1);color:var(--teal);border:1px solid rgba(20,184,166,.2)}

/* ─── QUIZ ─── */
.quiz-section{background:linear-gradient(135deg,#1a0c30 0%,#0e1525 100%);border:1px solid var(--border);border-radius:16px;padding:30px;margin-top:40px}
.quiz-header{display:flex;align-items:center;gap:14px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.quiz-icon{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,var(--pink),var(--purple));display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.quiz-header h3{font-family:var(--fh);font-size:1.2rem;font-weight:700}
.quiz-header p{font-size:.8rem;color:var(--t3)}
.q-item{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin-bottom:14px;transition:.2s}
.q-num{font-family:var(--fc);font-size:.7rem;color:var(--t3);margin-bottom:8px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.q-num .q-src{background:rgba(244,114,182,.1);color:var(--pink);padding:2px 8px;border-radius:4px;font-size:.65rem}
.q-text{font-size:.92rem;color:var(--t1);margin-bottom:14px;line-height:1.65}
.q-text strong{color:var(--pink)}
.q-opts{display:flex;flex-direction:column;gap:8px}
.q-opt{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:.2s;font-size:.85rem;color:var(--t2);user-select:none}
.q-opt:hover{border-color:var(--border2);color:var(--t1);background:rgba(255,255,255,.02)}
.q-opt.selected{border-color:var(--pink);background:rgba(244,114,182,.06);color:var(--t1)}
.q-opt.correct{border-color:var(--green)!important;background:rgba(16,185,129,.1)!important;color:#6ee7b7!important}
.q-opt.wrong{border-color:var(--red)!important;background:rgba(239,68,68,.1)!important;color:#fca5a5!important}
.q-opt-letter{width:24px;height:24px;border-radius:6px;background:var(--card2);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-family:var(--fc);flex-shrink:0;font-weight:600}
.q-explain{display:none;margin-top:14px;padding:14px 16px;background:rgba(244,114,182,.05);border-inline-start:3px solid var(--pink);border-radius:0 8px 8px 0;font-size:.84rem;color:#fbcfe8;line-height:1.65}
.q-explain.show{display:block;animation:fadeIn .35s ease}
.q-explain b{color:var(--pink);display:block;margin:6px 0 3px}
.q-explain .why-wrong{margin-top:8px;padding:8px 10px;background:rgba(239,68,68,.06);border-inline-start:2px solid var(--red);border-radius:0 6px 6px 0;font-size:.8rem;color:#fca5a5}
.q-explain .why-wrong b{color:var(--red)}
.quiz-btn{display:inline-flex;align-items:center;gap:8px;margin-top:8px;padding:10px 22px;border-radius:8px;border:none;cursor:pointer;font-family:var(--fh);font-size:.85rem;font-weight:600;transition:.2s}
.btn-check{background:linear-gradient(135deg,var(--pink),var(--purple));color:#fff}
.btn-check:hover{opacity:.9;transform:translateY(-1px)}
.btn-reset{background:rgba(255,255,255,.06);color:var(--t2);margin-inline-start:8px;border:1px solid var(--border)}
.btn-reset:hover{background:rgba(255,255,255,.1);color:var(--t1)}
.q-score{display:none;margin-top:16px;padding:14px 18px;border-radius:10px;font-family:var(--fh);font-weight:600;text-align:center}
.q-score.good{background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.3);color:var(--green)}
.q-score.ok{background:rgba(245,158,11,.1);border:1px solid rgba(245,158,11,.3);color:var(--amber)}
.q-score.bad{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:var(--red)}

/* ─── CHEAT SHEET ─── */
.cheat{background:var(--card2);border:1px solid var(--border);border-radius:14px;padding:22px;margin-bottom:18px}
.cheat h3{font-family:var(--fh);font-size:1rem;font-weight:700;margin-bottom:14px;color:var(--pink);display:flex;align-items:center;gap:8px}
.cheat-item{display:flex;align-items:flex-start;gap:10px;padding:7px 0;border-bottom:1px solid rgba(255,255,255,.04);font-size:.85rem}
.cheat-item:last-child{border-bottom:none}
.cheat-key{min-width:200px;font-family:var(--fc);font-size:.78rem;color:var(--amber);flex-shrink:0}
.cheat-val{color:var(--t2);line-height:1.55}

/* ─── COMPARISON CARDS ─── */
.compare{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:14px 0}
.cmp-card{background:var(--card2);border:1px solid var(--border);border-radius:12px;padding:18px;position:relative;overflow:hidden}
.cmp-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent,var(--pink))}
.cmp-card h4{font-family:var(--fh);font-size:1rem;color:var(--accent,var(--pink));margin-bottom:10px;font-weight:700}
.cmp-card p{font-size:.84rem;color:var(--t2);line-height:1.55}

/* ─── FLASHCARDS ─── */
.flashcards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:14px 0}
.flashcard{perspective:1000px;height:170px;cursor:pointer}
.fc-inner{position:relative;width:100%;height:100%;transition:transform .6s;transform-style:preserve-3d}
.flashcard.flipped .fc-inner{transform:rotateY(180deg)}
.fc-front,.fc-back{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:14px;padding:20px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;border:1px solid var(--border)}
.fc-front{background:linear-gradient(135deg,var(--card2),var(--card));color:var(--t1)}
.fc-back{background:linear-gradient(135deg,#2a1046,#1a0a2e);transform:rotateY(180deg);color:var(--pink)}
.fc-q{font-family:var(--fh);font-weight:600;font-size:.95rem;line-height:1.4}
.fc-a{font-family:var(--fh);font-weight:700;font-size:1rem;line-height:1.5;color:var(--pink)}
.fc-hint{position:absolute;bottom:10px;right:14px;font-size:.65rem;color:var(--t3);font-family:var(--fc)}

/* ─── LECTURE/CHAPTER CARDS (LANDING) ─── */
.lectures-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}
.lec-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;transition:.25s;cursor:pointer;position:relative;overflow:hidden;text-decoration:none;color:inherit;display:flex;flex-direction:column;min-height:180px}
.lec-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent,var(--pink)),transparent)}
.lec-card.ready{--accent:var(--pink)}
.lec-card.ready:hover{transform:translateY(-3px);border-color:var(--pink);box-shadow:0 10px 30px rgba(244,114,182,.15)}
.lec-card.locked{--accent:var(--t3);opacity:.55;cursor:not-allowed}
.lec-card.locked:hover{transform:none}
.lec-num{font-family:var(--fc);font-size:.72rem;color:var(--accent);margin-bottom:6px;letter-spacing:.06em}
.lec-title{font-family:var(--fh);font-size:1rem;font-weight:600;color:var(--t1);margin-bottom:8px;line-height:1.35}
.lec-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:.72rem;color:var(--t3)}
.lec-status{padding:3px 10px;border-radius:20px;font-size:.68rem;font-weight:600;font-family:var(--fc)}
.lec-status.ready{background:rgba(16,185,129,.12);color:var(--green);border:1px solid rgba(16,185,129,.25)}
.lec-status.locked{background:rgba(100,116,139,.12);color:var(--t3);border:1px solid rgba(100,116,139,.25)}

/* ─── BUTTONS ─── */
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:8px;text-decoration:none;font-family:var(--fh);font-size:.84rem;font-weight:600;transition:.2s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--pink),var(--purple));color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(244,114,182,.25)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--t1);border-color:var(--border)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--border2)}

/* ─── SCROLL TO TOP ─── */
#scroll-top{position:fixed;bottom:20px;right:20px;width:42px;height:42px;border-radius:11px;background:rgba(244,114,182,.15);border:1px solid rgba(244,114,182,.3);color:var(--pink);font-size:1.15rem;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:.3s;z-index:200}
#scroll-top.show{opacity:1}

/* ─── MOBILE MENU BUTTON ─── */
#menu-btn{position:fixed;bottom:20px;left:20px;z-index:200;width:46px;height:46px;border-radius:12px;background:var(--pink);border:none;cursor:pointer;color:#000;font-size:1.3rem;display:none;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(244,114,182,.4)}

/* ─── ANIMATIONS ─── */
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(244,114,182,.4)}50%{box-shadow:0 0 0 14px rgba(244,114,182,0)}}
.animate{animation:fadeIn .4s ease forwards}
.topic{animation:fadeIn .35s ease forwards}

/* ─── BIDI FIX ─── */
#main p, #main h1, #main h2, #main h3, #main h4, #main h5, #main h6,
#main li, #main td, #main th,
#main .topic-title, #main .ch-title p,
#main .tip div, #main .warn div, #main .info div, #main .danger div,
#main .q-text, #main .q-explain, #main .cheat-val, #main .q-opt,
#main .hero p, #main .hero-badge, #main .topic p, #main .ch-title h2,
#main .q-num, #main .tl-desc, #main .cmp-card p, #main .kw-card .kw-desc,
#main .lec-title, #main .fc-q, #main .fc-a, #main .q-score,
#main .why-wrong, #main .pillar, #main .cheat-key{
  direction: rtl;
  unicode-bidi: isolate;
  text-align: start;
}
#main [dir="rtl"]{direction:rtl;unicode-bidi:isolate}
#main [dir="ltr"]{direction:ltr;unicode-bidi:isolate}
code,.badge,.code-lang,.q-opt-letter,.q-src,.lec-num,.lec-status,.sb-section,
.hstat .num,.hstat .lbl,.sb-link,.sb-back,.cheat-key,.tl-date,.kw-tag,.kw-name{
  direction:ltr;unicode-bidi:isolate;
}
strong,b,em,i{unicode-bidi:isolate}
pre,.code-wrap{direction:ltr;unicode-bidi:isolate;text-align:left}
#sidebar{direction:ltr}
.q-opt{direction:rtl}
.q-explain,.q-score{direction:rtl;unicode-bidi:isolate;text-align:start}
bdi{display:inline;direction:ltr;unicode-bidi:isolate}

/* ─── RESPONSIVE ─── */
@media(max-width:1100px){
  .lectures-grid{grid-template-columns:repeat(3,1fr)}
  .compare{grid-template-columns:repeat(2,1fr)}
  .flashcards{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  :root{--fw:0px}
  #sidebar{transform:translateX(-280px)}
  #sidebar.open{transform:translateX(0);width:280px;box-shadow:0 0 30px rgba(0,0,0,.6)}
  #main{margin-left:0}
  .content{padding:24px 16px}
  .hero{padding:40px 20px 32px}
  .hero h1{font-size:1.8rem}
  .grid2,.grid3,.grid4{grid-template-columns:1fr}
  #menu-btn{display:flex}
  .hero-stats{gap:14px}
  .tbl{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .cheat-item{flex-direction:column;gap:5px}
  .cheat-key{min-width:auto}
  .lectures-grid{grid-template-columns:repeat(2,1fr)}
  .compare,.flashcards{grid-template-columns:1fr}
}
@media(min-width:901px){#menu-btn{display:none!important}}
@media(max-width:500px){
  .lectures-grid{grid-template-columns:1fr}
  .hero h1{font-size:1.55rem}
}

/* ─── RTL LAYOUT OVERRIDES ─── */
html[dir="rtl"] body{direction:rtl}
html[dir="rtl"] #sidebar{left:auto;right:0;border-right:none;border-left:1px solid var(--border);direction:ltr}
html[dir="rtl"] #main{margin-left:0;margin-right:var(--fw)}
html[dir="rtl"] #prog-bar{left:auto;right:0}
html[dir="rtl"] #scroll-top{right:auto;left:20px}
html[dir="rtl"] #menu-btn{left:auto;right:20px}
html[dir="rtl"] .hero::before{right:auto;left:-100px}
html[dir="rtl"] .hero::after{left:auto;right:200px}
html[dir="rtl"] .q-explain{border-radius:8px 0 0 8px}
html[dir="rtl"] .q-explain .why-wrong{border-radius:8px 0 0 8px}
html[dir="rtl"] .fc-hint{right:auto;left:14px}
@media(max-width:900px){
  html[dir="rtl"] #sidebar{transform:translateX(280px)}
  html[dir="rtl"] #sidebar.open{transform:translateX(0)}
  html[dir="rtl"] #main{margin-right:0}
}