@font-face{font-family:Vazirmatn;src:url("fonts/Vazirmatn-Regular.ttf") format("truetype");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Vazirmatn;src:url("fonts/Vazirmatn-Medium.ttf") format("truetype");font-weight:500;font-style:normal;font-display:swap}@font-face{font-family:Vazirmatn;src:url("fonts/Vazirmatn-SemiBold.ttf") format("truetype");font-weight:600;font-style:normal;font-display:swap}@font-face{font-family:Vazirmatn;src:url("fonts/Vazirmatn-Bold.ttf") format("truetype");font-weight:700;font-style:normal;font-display:swap}
:root{--navy:#153c5b;--navy-deep:#0e2d46;--blue:#287d93;--teal:#1b8a7e;--paper:#f4f6f8;--surface:#fff;--ink:#1d2d3a;--muted:#6f8190;--line:#dbe3e8;--soft:#edf4f6;--accent:#e6a64a;--shadow:0 10px 25px rgba(26,58,82,.08)}*{box-sizing:border-box}html{background:var(--paper)}body{min-height:100vh;margin:0;background:linear-gradient(120deg,#f6f8fa 0,#eef3f5 100%);color:var(--ink);font-family:Vazirmatn,Tahoma,Arial,sans-serif;line-height:1.85}.app-shell{width:min(1120px,calc(100% - 48px));margin:0 auto;padding:22px 0 50px}.app-header{height:59px;display:flex;justify-content:space-between;align-items:center}.brand{border:0;background:transparent;color:var(--navy);font:600 1rem/1.3 Vazirmatn,Tahoma,sans-serif;padding:0;display:flex;align-items:center;gap:10px;text-align:right;cursor:pointer}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:7px;background:var(--navy);color:#fff;font-weight:700;font-size:1.08rem}.brand small{display:block;color:var(--muted);font-weight:400;font-size:.68rem;line-height:1.2;margin-top:2px}.header-meta{background:#fff;border:1px solid var(--line);border-radius:7px;padding:5px 10px;color:var(--muted);font-size:.74rem;display:flex;align-items:center;gap:8px}.header-meta i{width:3px;height:3px;border-radius:50%;background:#a5b4bd}.screen{display:none;animation:screen-in .28s ease both}.screen.is-active{display:block}@keyframes screen-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.landing{padding:clamp(55px,10vh,105px) 3% 30px;min-height:calc(100vh - 131px)}.landing-grid{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(310px,.78fr);align-items:stretch;gap:18px}.hero-panel{position:relative;overflow:hidden;min-height:425px;border-radius:12px;padding:clamp(31px,5vw,58px);background:linear-gradient(140deg,var(--navy),#205f78);color:#fff;box-shadow:var(--shadow)}.section-label{font-family:Arial,sans-serif;letter-spacing:.16em;font-size:.66rem;font-weight:700;color:var(--blue);margin:0 0 9px;line-height:1.2}.hero-panel .section-label{color:#a6d9d3}.hero-panel h1{position:relative;z-index:1;font-size:clamp(3.2rem,7vw,6.5rem);line-height:1.08;letter-spacing:-.075em;margin:0;font-weight:700}.hero-panel h1 span{color:#c5ece5}.hero-stats{position:relative;z-index:1;display:flex;gap:11px;margin-top:46px}.hero-stats span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:6px;padding:7px 11px;font-size:.75rem;color:#d9eeeb}.hero-stats b{font-family:Arial,sans-serif;font-size:1rem;color:#fff;margin-left:4px}.hero-pattern{position:absolute;left:-20px;bottom:-42px;width:260px;height:205px;opacity:.22;transform:rotate(-18deg);display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.hero-pattern i{border:1px solid #b3e7df;border-radius:4px}.hero-pattern i:nth-child(2),.hero-pattern i:nth-child(5){background:#b3e7df}.study-panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:31px 27px;box-shadow:var(--shadow);display:flex;flex-direction:column}.panel-heading h2{margin:0;color:var(--navy);letter-spacing:-.04em;font-size:1.7rem;line-height:1.4}.mode-grid{display:grid;gap:11px;margin-top:auto;padding-top:35px}.mode-card{border:1px solid var(--line);border-radius:8px;background:#fff;padding:15px 14px;display:flex;align-items:center;text-align:right;color:var(--ink);font:inherit;cursor:pointer;transition:border-color .18s,transform .18s,box-shadow .18s;gap:12px}.mode-card:hover,.mode-card:focus-visible{border-color:#83b7bb;transform:translateY(-2px);box-shadow:0 8px 18px rgba(21,60,91,.10);outline:0}.mode-random{background:var(--navy);border-color:var(--navy);color:#fff}.mode-random:hover,.mode-random:focus-visible{border-color:var(--navy-deep);background:var(--navy-deep)}.mode-icon{display:grid;place-items:center;width:38px;height:38px;background:var(--soft);border-radius:7px;color:var(--blue);font:400 1.35rem/1 Arial}.mode-random .mode-icon{background:rgba(255,255,255,.13);color:#f1c46a}.mode-icon-grid{font-size:1.5rem}.mode-content{flex:1;display:flex;flex-direction:column;align-items:flex-start}.mode-content strong{font-size:.97rem;font-weight:600}.mode-content small{font-size:.71rem;color:var(--muted);margin-top:2px}.mode-random .mode-content small{color:#b8cfdb}.mode-arrow{font:1.15rem/1 Arial;color:#8ea1ae}.mode-random .mode-arrow{color:#d8e6ed}.topic-screen{padding:42px 3%}.page-card{background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:clamp(22px,4vw,42px);box-shadow:var(--shadow)}.page-heading{display:flex;align-items:flex-start;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:22px;margin-bottom:21px}.page-heading h2{font-size:clamp(1.8rem,4vw,2.5rem);letter-spacing:-.055em;line-height:1.3;color:var(--navy);margin:0}.text-back{border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font:500 .76rem/1.5 Vazirmatn,Tahoma,sans-serif;padding:7px 10px;cursor:pointer;transition:.16s}.text-back:hover,.text-back:focus-visible{color:var(--navy);border-color:#93acb9;background:var(--soft);outline:0}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.topic-card{border:1px solid var(--line);border-radius:8px;background:#fff;padding:14px 13px;text-align:right;display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;color:var(--ink);font:inherit;cursor:pointer;transition:.16s}.topic-card:hover,.topic-card:focus-visible{border-color:#7eb4b5;background:#f3fbfa;transform:translateY(-1px);outline:0}.topic-index{display:grid;place-items:center;width:29px;height:29px;border-radius:6px;background:var(--soft);color:var(--blue);font:bold .72rem/1 Arial;direction:ltr}.topic-copy strong{display:block;font-size:.88rem;font-weight:500;line-height:1.45}.topic-copy small{display:block;color:var(--muted);font-size:.68rem;margin-top:2px}.topic-chevron{font:1rem/1 Arial;color:#91a2ad}.quiz-screen{padding:26px 3% 10px;min-height:calc(100vh - 130px)}.quiz-screen.is-active{display:flex;flex-direction:column}.quiz-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px}.progress-wrap{display:flex;align-items:center;gap:12px;min-width:250px}.progress-wrap>div:first-child{display:flex;gap:8px;white-space:nowrap;font-size:.73rem}.progress-wrap span{font-weight:600;color:var(--navy)}.progress-wrap small{color:var(--muted);font-size:.72rem}.progress-bar{height:5px;flex:1;border-radius:6px;background:#d8e3e7;overflow:hidden;direction:ltr}.progress-bar i{display:block;height:100%;width:0;background:var(--teal);border-radius:inherit;transition:width .25s ease}.question-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:clamp(28px,5vw,61px);min-height:375px;display:flex;flex-direction:column;justify-content:center}.question-heading{display:flex;gap:10px;align-items:center;margin-bottom:23px}.question-number{background:var(--navy);color:#fff;border-radius:6px;padding:4px 7px;font:700 .72rem/1 Arial;direction:ltr}.topic-pill{border-radius:5px;background:#eaf6f4;color:#19776f;padding:3px 9px;font-size:.7rem}.question-card h2{max-width:900px;margin:0;color:var(--navy);font-size:clamp(1.35rem,3.1vw,2.18rem);line-height:1.95;letter-spacing:-.04em;font-weight:500;white-space:pre-wrap;direction:rtl;text-align:right;unicode-bidi:plaintext;overflow-wrap:anywhere}.answer-button{align-self:flex-start;margin-top:34px;border:0;border-radius:7px;background:var(--teal);color:#fff;padding:10px 15px;font:600 .84rem/1.6 Vazirmatn,Tahoma,sans-serif;cursor:pointer;transition:background .15s,transform .15s}.answer-button:hover,.answer-button:focus-visible{background:#116d64;transform:translateY(-1px);outline:0}.answer-button span{color:#f5ce7f;margin-left:5px}.question-nav{display:flex;justify-content:flex-end;gap:9px;margin-top:16px}.nav-button{border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--navy);padding:9px 13px;font:500 .79rem/1.6 Vazirmatn,Tahoma,sans-serif;cursor:pointer;transition:.15s}.nav-next{background:var(--navy);border-color:var(--navy);color:#fff}.nav-button:hover:not(:disabled),.nav-button:focus-visible:not(:disabled){border-color:var(--blue);color:#fff;background:var(--blue);outline:0}.nav-button:disabled{opacity:.42;cursor:not-allowed}.modal-backdrop{position:fixed;inset:0;z-index:5;background:rgba(8,28,44,.58);backdrop-filter:blur(3px)}.answer-modal{position:fixed;z-index:6;width:min(720px,calc(100% - 34px));right:50%;top:50%;transform:translate(50%,-50%);background:#fff;border-radius:11px;box-shadow:0 20px 55px rgba(4,25,42,.25);padding:25px 28px;max-height:min(78vh,720px);overflow:auto;animation:modal-in .2s ease both}@keyframes modal-in{from{opacity:0;transform:translate(50%,-47%)}to{opacity:1;transform:translate(50%,-50%)}}.answer-modal[hidden],.modal-backdrop[hidden]{display:none}.modal-header{display:flex;align-items:flex-start;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}.modal-header .section-label{margin-bottom:4px;color:var(--teal);font-family:Vazirmatn,Tahoma,sans-serif;letter-spacing:0;font-size:.72rem}.modal-header .section-label span{font-family:Arial,sans-serif;direction:ltr}.modal-header h2{margin:0;color:var(--navy);font-size:1.45rem;line-height:1.3}.close-button{width:31px;height:31px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font:400 1.45rem/1 Arial;cursor:pointer}.close-button:hover,.close-button:focus-visible{background:#f2f6f7;color:var(--navy);border-color:#97aeba;outline:0}.answer-content{padding:20px 0 22px;white-space:pre-wrap;direction:rtl;text-align:right;unicode-bidi:plaintext;overflow-wrap:anywhere;color:#344753;font-size:.95rem;line-height:2.18}.answer-footer{border-top:1px solid var(--line);padding-top:13px;text-align:left}.modal-next{border:0;background:transparent;color:var(--teal);font:600 .81rem/1.7 Vazirmatn,Tahoma,sans-serif;cursor:pointer}.modal-next:hover{text-decoration:underline}.loading-screen{position:fixed;z-index:20;inset:0;background:linear-gradient(145deg,var(--navy-deep),var(--navy));color:#fff;display:grid;place-content:center;justify-items:center;gap:14px;transition:opacity .24s ease}.loading-screen[hidden]{display:none}.loading-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:9px;border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.1);font-size:1.45rem;font-weight:700}.loading-screen strong{font-size:1.1rem;font-weight:500}.loading-line{width:125px;height:3px;border-radius:6px;background:rgba(255,255,255,.18);overflow:hidden}.loading-line i{display:block;width:42%;height:100%;background:#92d3c9;animation:load-line .85s ease-in-out infinite}@keyframes load-line{from{transform:translateX(250%)}to{transform:translateX(-250%)}}body.is-loading{overflow:hidden}@media(max-width:720px){.app-shell{width:min(100% - 28px,600px);padding-top:12px}.app-header{height:54px}.landing{padding:35px 0 20px;min-height:calc(100vh - 80px)}.landing-grid{grid-template-columns:1fr;gap:13px}.hero-panel{min-height:290px;padding:32px 28px}.hero-panel h1{font-size:clamp(3rem,15vw,4.8rem)}.hero-stats{margin-top:27px}.study-panel{padding:24px 20px}.mode-grid{margin-top:24px;padding-top:0}.topic-screen{padding:24px 0}.page-card{padding:21px 16px}.page-heading{padding-bottom:16px;margin-bottom:16px}.topic-grid{grid-template-columns:1fr;gap:8px}.quiz-screen{padding:14px 0 0;min-height:calc(100vh - 67px)}.quiz-meta{margin-bottom:13px}.progress-wrap{min-width:155px;max-width:62%;gap:7px}.progress-wrap>div:first-child{display:block;overflow:hidden;text-overflow:ellipsis}.progress-wrap small{display:block;margin-top:1px}.question-card{min-height:400px;border-radius:9px;padding:26px 20px}.question-card h2{font-size:1.2rem;line-height:2.05}.question-heading{margin-bottom:18px}.answer-button{margin-top:30px}.question-nav{margin-top:13px}.nav-button{flex:1;padding:10px 6px;font-size:.75rem}.answer-modal{width:calc(100% - 24px);max-height:84vh;border-radius:10px;padding:20px 18px}.answer-content{font-size:.9rem;line-height:2.2}.header-meta{font-size:.67rem;padding:5px 7px;gap:6px}.brand small{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* Exam-focus topics */
.featured-section{margin:0 0 25px;padding:22px;border:1px solid #cfe3e4;border-radius:9px;background:linear-gradient(135deg,#f1faf9,#f8fbfc)}.featured-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:16px}.featured-heading .section-label{color:var(--teal);margin-bottom:4px}.featured-heading h3{margin:0;color:var(--navy);font-size:1.22rem;line-height:1.4;letter-spacing:-.035em}.featured-random{border:0;border-radius:7px;background:var(--teal);color:#fff;padding:9px 12px;font:600 .75rem/1.7 Vazirmatn,Tahoma,sans-serif;cursor:pointer;transition:background .15s,transform .15s;white-space:nowrap}.featured-random:hover,.featured-random:focus-visible{background:#116d64;transform:translateY(-1px);outline:0}.featured-random span{font-family:Arial;margin-right:5px}.featured-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.featured-topic-card{border:1px solid #c9dfe0;border-radius:7px;background:rgba(255,255,255,.82);padding:12px;text-align:right;display:grid;grid-template-columns:32px 1fr auto;align-items:center;gap:9px;color:var(--ink);font:inherit;cursor:pointer;transition:.16s}.featured-topic-card:hover,.featured-topic-card:focus-visible{border-color:#69a9a6;background:#fff;box-shadow:0 6px 15px rgba(30,111,108,.09);transform:translateY(-1px);outline:0}.featured-index{display:grid;place-items:center;width:28px;height:28px;border-radius:6px;background:#ddf0ed;color:var(--teal);font:bold .71rem/1 Arial;direction:ltr}.featured-copy strong{display:block;font-size:.84rem;font-weight:500;line-height:1.5}.featured-copy small{display:block;color:var(--muted);font-size:.67rem;margin-top:1px}.topics-divider{display:flex;align-items:center;gap:11px;margin:0 0 15px;color:var(--muted);font-size:.76rem}.topics-divider:after{content:"";height:1px;background:var(--line);flex:1}@media(max-width:720px){.featured-section{padding:17px 14px;margin-bottom:20px}.featured-heading{align-items:flex-start;flex-direction:column;gap:10px}.featured-random{width:100%;text-align:center}.featured-grid{grid-template-columns:1fr;gap:7px}.featured-topic-card{padding:11px}.featured-copy strong{font-size:.81rem}}

/* Quick notes */
.mode-notes{background:#f6f4ef;border-color:#e5ddcf}.mode-notes .mode-icon{background:#f4e7ca;color:#a56810}.quick-notes-card{max-width:1040px;margin:0 auto}.quick-filters{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 22px;padding-bottom:19px;border-bottom:1px solid var(--line)}.quick-filter{border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);padding:7px 10px;font:500 .74rem/1.6 Vazirmatn,Tahoma,sans-serif;cursor:pointer;transition:.15s}.quick-filter:hover,.quick-filter:focus-visible{border-color:#82afae;color:var(--teal);outline:0}.quick-filter.is-active{background:var(--navy);border-color:var(--navy);color:#fff}.quick-notes-list{display:grid;gap:13px}.quick-note-card{border:1px solid var(--line);border-radius:9px;background:#fff;padding:21px 22px}.quick-note-card header{display:flex;align-items:center;gap:10px;margin-bottom:13px}.quick-note-number{display:grid;place-items:center;width:30px;height:30px;border-radius:6px;background:var(--soft);color:var(--blue);font:700 .71rem/1 Arial;direction:ltr}.quick-note-card h3{margin:0;color:var(--navy);font-size:1.05rem;line-height:1.5;font-weight:600}.quick-note-body{margin:0;color:#3e5361;font-size:.91rem;line-height:2.15;white-space:pre-wrap;direction:rtl;text-align:right;unicode-bidi:plaintext;overflow-wrap:anywhere}.quick-note-memory{display:flex;align-items:flex-start;gap:8px;margin:17px 0 0;padding:10px 11px;border-right:3px solid var(--accent);border-radius:4px;background:#fff9ed;color:#71572b;font-size:.79rem;line-height:1.9}.quick-note-memory strong{white-space:nowrap;color:#9b6817;font-weight:600}.quick-note-memory span{direction:rtl;text-align:right;unicode-bidi:plaintext;overflow-wrap:anywhere}@media(max-width:720px){.quick-filters{gap:6px;margin-bottom:16px;padding-bottom:15px}.quick-filter{font-size:.68rem;padding:6px 8px}.quick-note-card{border-radius:8px;padding:17px 15px}.quick-note-body{font-size:.86rem;line-height:2.15}.quick-note-memory{font-size:.74rem;gap:6px;padding:9px}.quick-note-memory{flex-direction:column;gap:1px}}