/**
 * shared-styles.css v1.0 — Единые стили для всех курсовых страниц
 * Подключение: <link rel="stylesheet" href="../shared-styles.css">
 */

/* ── RESET & BASE ── */
*{margin:0;padding:0;box-sizing:border-box}
/* Remove grid/dot background pattern from all pages */
body::after{display:none !important}
/* Kill all large gaps between sections */
section{margin-top:0 !important;margin-bottom:0 !important;padding-top:8px !important;padding-bottom:8px !important}
section.page-header,section.hero{padding-top:40px !important}
@media(max-width:767px){
    section.page-header,section.hero{padding-top:16px !important}
}
h2{margin-top:16px !important}
html{overflow-x:hidden;width:100%;max-width:100vw;scroll-behavior:smooth;background:#070b14;color:#ffffff}

/* ── NAVBAR OFFSET — handled by shared-nav.css ── */
:root{
    --primary:#06b6d4;
    --secondary:#0ea5e9;
    --accent:#f97316;
    --success:#10b981;
    --warning:#f59e0b;
    --danger:#ef4444;
    --bg-dark:#0a0e1a;
    --bg-darker:#070b14;
    --text-primary:#ffffff;
    --text-secondary:#e2e8f0;
    --text-muted:#94a3b8
}
body{
    font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
    background:var(--bg-darker);
    color:var(--text-primary);
    line-height:1.7;
    overflow-x:hidden;
    width:100%;max-width:100vw;
    margin:0;padding:0;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale
}
body::before{
    content:'';position:fixed;top:0;left:0;width:100%;height:100%;
    background:radial-gradient(circle at 15% 25%,rgba(6,182,212,.15),transparent 50%),
               radial-gradient(circle at 85% 75%,rgba(249,115,22,.1),transparent 50%),
               radial-gradient(circle at 50% 50%,rgba(14,165,233,.08),transparent 70%);
    z-index:-1;pointer-events:none
}

/* ── CONTAINER ── */
.container{max-width:1100px;margin:0 auto;padding:40px 40px}

/* ── HERO / PAGE HEADER ── */
.page-header{padding:70px 0 8px;text-align:center}
.page-badge{
    display:inline-flex;align-items:center;gap:8px;padding:10px 20px;
    background:linear-gradient(135deg,rgba(6,182,212,.15),rgba(14,165,233,.15));
    border:1px solid rgba(6,182,212,.3);border-radius:24px;
    font-size:13px;font-weight:700;color:var(--primary);
    margin-bottom:20px;text-transform:uppercase;letter-spacing:1.5px
}
.page-title{
    font-size:clamp(36px,5vw,64px);font-weight:900;
    background:linear-gradient(135deg,#06b6d4 0%,#0ea5e9 40%,#f97316 80%,#fb923c 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    margin-bottom:6px;line-height:1.1;
    text-shadow:none
}
.page-subtitle{font-size:18px;color:var(--text-secondary);max-width:800px;margin:0 auto;line-height:1.7;text-align:center}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.hero-stat{text-align:center;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:16px 12px}
.hero-stat-number{
    font-size:clamp(24px,3.5vw,36px);font-weight:900;
    background:linear-gradient(135deg,var(--primary),var(--accent));
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    display:block
}
.hero-stat-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-weight:600;margin-top:4px;display:block}

/* ── SECTIONS ── */
.section{padding:8px 0 !important}
.section-title{
    font-size:clamp(24px,3vw,36px) !important;font-weight:900;margin-bottom:16px !important;
    background:linear-gradient(135deg,#06b6d4 0%,#0ea5e9 50%,#f97316 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    text-shadow:none
}
.section-text{font-size:17px;color:#e2e8f0;line-height:1.85;margin-bottom:16px;max-width:950px;text-align:left}
.section-text strong{color:#ffffff}
.section-desc{font-size:17px;color:#e2e8f0;line-height:1.8;max-width:900px;margin-bottom:32px;text-align:left}
.glass-card{
    background:rgba(255,255,255,.03);
    border:1px solid rgba(255,255,255,0.15);
    border-bottom:3px solid rgba(6,182,212,.4);
    border-radius:20px;
    padding:32px;
    backdrop-filter:blur(10px);
    box-shadow:0 4px 16px rgba(0,0,0,.2);
    transition:all .3s ease
}
.glass-card:hover{
    border-color:rgba(6,182,212,.5);
    background:rgba(6,182,212,.05);
    transform:translateY(-4px);
    box-shadow:0 12px 40px rgba(6,182,212,.15)
}
.glass-card h3{font-size:20px;font-weight:800;color:#ffffff;margin-bottom:12px}
.glass-card p{font-size:15px;color:var(--text-secondary);line-height:1.8;text-align:left}

/* ── GLOBAL TEXT ── */
p{color:#e2e8f0;line-height:1.75}
li{color:#e2e8f0;line-height:1.75}
strong{color:#ffffff}
.glass-card p{font-size:15px;color:#e2e8f0;line-height:1.8;text-align:left}

/* ── MODULE CONTENT ── */
.block-content{font-size:16px !important;line-height:1.8;color:#e2e8f0}
.block-content p{font-size:16px !important;color:#e2e8f0}
.block-content li{font-size:16px !important;color:#e2e8f0}
.block-content h3{font-size:1.2rem !important}
.block-content h4{font-size:1.05rem !important}
@media(max-width:480px){
    .block-content{font-size:15px !important}
    .block-content p,.block-content li{font-size:15px !important}
}

/* ── GRIDS ── */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ── COURSE NAVIGATION ── */
.course-nav-block{margin-bottom:20px}
.course-nav-toggle{
    display:flex;align-items:center;gap:12px;width:100%;
    padding:20px 24px;background:linear-gradient(135deg,rgba(6,182,212,.08),rgba(14,165,233,.06));
    border:1px solid rgba(6,182,212,.2);border-radius:16px;
    cursor:pointer;transition:all .3s;font-family:inherit;color:var(--text-primary)
}
.course-nav-toggle:hover{background:linear-gradient(135deg,rgba(6,182,212,.12),rgba(14,165,233,.1));border-color:rgba(6,182,212,.3)}
.course-nav-toggle .cnt-icon{font-size:24px}
.course-nav-toggle .cnt-title{font-size:18px;font-weight:700;flex:1;text-align:left}
.course-nav-toggle .cnt-arrow{font-size:14px;color:var(--primary);transition:transform .3s}
.course-nav-toggle.active .cnt-arrow{transform:rotate(180deg)}
.course-nav-content{max-height:0;overflow:hidden;transition:max-height .5s ease}
.course-nav-content.active{max-height:800px}
.course-nav-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:24px}
.cnav-section{}
.cnav-header{font-size:11px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px}
.cnav-items{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.cnav-items a{
    padding:6px 14px;color:var(--text-secondary);text-decoration:none;
    font-size:13px;font-weight:500;border-radius:10px;transition:all .2s;
    border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.02);
    position:relative;overflow:hidden
}
.cnav-items a::before{
    content:'';position:absolute;left:0;top:0;height:100%;width:3px;
    background:linear-gradient(135deg,#06b6d4,#0ea5e9);transform:scaleY(0);transition:transform .3s
}
.cnav-items a:hover{background:rgba(6,182,212,.08);color:#06b6d4;border-color:rgba(6,182,212,.2);transform:translateX(4px)}
.cnav-items a:hover::before{transform:scaleY(1)}
.cnav-items a.active{background:rgba(6,182,212,.12);color:#06b6d4;border-color:rgba(6,182,212,.3);font-weight:600}
.cnav-items a.active::before{transform:scaleY(1)}

/* ── TABS ── */
.tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.tab{
    padding:8px 16px;border-radius:10px;border:1px solid rgba(255,255,255,.1);
    background:rgba(255,255,255,.03);color:var(--text-muted);
    font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit
}
.tab:hover,.tab.active{background:rgba(6,182,212,.12);border-color:rgba(6,182,212,.3);color:var(--primary)}
.tab-content{display:none}
.tab-content.active{display:block}

/* ── EXPAND/COLLAPSE ── */
.expand-item{margin-bottom:8px}
.expand-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 18px;background:rgba(255,255,255,.03);
    border:1px solid rgba(255,255,255,.06);border-radius:12px;
    cursor:pointer;transition:all .2s;color:var(--text-primary);font-weight:600
}
.expand-header:hover{background:rgba(6,182,212,.08);border-color:rgba(6,182,212,.2)}
.expand-arrow{font-size:12px;color:var(--text-muted);transition:transform .3s}
.expand-item.open .expand-arrow{transform:rotate(180deg)}
.expand-body{max-height:0;overflow:hidden;transition:max-height .4s ease}
.expand-item.open .expand-body{max-height:600px}
.expand-body p{padding:12px 18px;font-size:14px;color:var(--text-secondary);line-height:1.8}

/* ── QUIZ ── */
.quiz-card{
    background:linear-gradient(135deg,rgba(6,182,212,.06),rgba(14,165,233,.04));
    border:1px solid rgba(6,182,212,.15);border-radius:20px;padding:32px;
    box-shadow:0 4px 20px rgba(0,0,0,0.15)
}
.quiz-question{font-size:18px;font-weight:700;margin-bottom:20px;color:var(--text-primary)}
.quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:16px}
.quiz-option{
    padding:14px 18px;border-radius:12px;border:1px solid rgba(255,255,255,.1);
    background:rgba(255,255,255,.03);color:var(--text-secondary);
    font-size:14px;cursor:pointer;transition:all .2s;text-align:left;font-family:inherit
}
.quiz-option:hover{background:rgba(6,182,212,.1);border-color:rgba(6,182,212,.3);color:var(--text-primary)}
.quiz-option.correct{background:rgba(16,185,129,.15);border-color:rgba(16,185,129,.4);color:#10b981}
.quiz-option.wrong{background:rgba(239,68,68,.15);border-color:rgba(239,68,68,.4);color:#ef4444}
.quiz-option:disabled{cursor:default;opacity:.8}
.quiz-feedback{display:none;padding:12px 16px;border-radius:10px;font-size:14px;line-height:1.6;margin-bottom:12px}
.quiz-feedback.visible{display:block}
.quiz-feedback.success{background:rgba(16,185,129,.1);border:1px solid rgba(16,185,129,.2);color:#6ee7b7}
.quiz-feedback.error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);color:#fca5a5}
.quiz-nav{display:flex;justify-content:space-between;align-items:center}
.quiz-counter{font-size:13px;color:var(--text-muted)}
.quiz-next-btn{
    padding:10px 20px;border-radius:10px;border:none;
    background:linear-gradient(135deg,var(--primary),var(--secondary));
    color:#fff;font-weight:600;cursor:pointer;display:none;font-family:inherit
}
.quiz-next-btn.visible{display:block}
.quiz-score{display:none;text-align:center;padding:20px}
.quiz-score.visible{display:block}
.score-number{font-size:48px;font-weight:900;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.quiz-restart-btn{
    margin-top:16px;padding:10px 24px;border-radius:10px;border:1px solid rgba(6,182,212,.3);
    background:rgba(6,182,212,.1);color:var(--primary);font-weight:600;cursor:pointer;font-family:inherit
}

/* ── COMPLETE MODULE BUTTON ── */
.complete-module-btn{
    display:flex;align-items:center;justify-content:center;gap:12px;
    width:100%;max-width:1100px;margin:16px auto 12px;padding:18px 32px;
    background:linear-gradient(135deg,#10b981,#059669);color:#fff;border:none;border-radius:16px;
    font-size:18px;font-weight:700;cursor:pointer;transition:all .3s;
    position:relative;overflow:hidden;font-family:inherit;
    box-shadow:0 4px 20px rgba(16,185,129,0.2)
}
.complete-module-btn:hover{
    background:linear-gradient(135deg,#059669,#047857);
    transform:translateY(-2px);box-shadow:0 8px 25px rgba(16,185,129,.3)
}

/* ── MODULE NAVIGATION (prev/next) ── */
.module-navigation{display:flex;justify-content:space-between;gap:16px;margin:0 auto 24px;max-width:1100px;padding:0 20px}
.module-nav-btn{
    flex:1;display:flex;align-items:center;gap:12px;padding:16px 20px;
    background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:14px;
    text-decoration:none;color:#f1f5f9;transition:all .3s;position:relative;overflow:hidden;
    box-shadow:0 2px 12px rgba(0,0,0,0.15)
}
.module-nav-btn:hover{background:rgba(6,182,212,.12);border-color:#06b6d4;transform:translateY(-2px);box-shadow:0 8px 24px rgba(6,182,212,0.15)}
.module-nav-btn.next{justify-content:flex-end}
.module-nav-btn .icon{font-size:24px;transition:transform .3s}
.module-nav-btn:hover .icon{transform:translateX(-4px)}
.module-nav-btn.next:hover .icon{transform:translateX(4px)}
.module-nav-btn .text{display:flex;flex-direction:column;gap:2px}
.module-nav-btn .label{font-size:11px;color:#e2e8f0;text-transform:uppercase;letter-spacing:1px;font-weight:600}
.module-nav-btn .title{font-size:15px;font-weight:700;color:#f1f5f9}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-darker)}
::-webkit-scrollbar-thumb{background:rgba(6,182,212,.3);border-radius:4px}


@media(max-width:1024px){
    .container{padding:30px 24px}
    .course-nav-grid{grid-template-columns:repeat(2,1fr)}
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .container{padding:20px}
    .page-header{padding:80px 0 20px}
    .page-subtitle{font-size:16px;text-align:center}
    .hero-stats{grid-template-columns:repeat(2,1fr);gap:12px;max-width:360px;margin-left:auto;margin-right:auto}
    .section-title{font-size:22px !important}
    .section-text,.section-desc{font-size:15px !important}
    .course-nav-grid{grid-template-columns:1fr;gap:20px;padding:24px 20px}
    .course-nav-toggle{padding:18px 20px}
    .course-nav-toggle .cnt-title{font-size:16px}
    .quiz-options{grid-template-columns:1fr}
    .grid-2,.grid-3{grid-template-columns:1fr}
    .module-navigation{flex-direction:column;gap:12px}
    .glass-card{padding:24px !important}
}
@media(max-width:480px){
    .container{padding:16px}
    .hero-stats{grid-template-columns:repeat(2,1fr);gap:10px;max-width:320px}
    .hero-stat{padding:12px 8px}
    .section-title{font-size:20px !important}
    .section-text,.section-desc{font-size:14px !important}
    .glass-card{padding:20px !important}
    .quiz-card{padding:24px}
}
@media(max-width:360px){
    .container{padding:12px}
    .hero-stats{gap:8px}
    .glass-card{padding:16px !important}
    .quiz-card{padding:20px}
}

/* ── REDUCE WHITESPACE ON MOBILE ── */
@media(max-width:767px){
    .main{padding-top:16px !important;padding-bottom:40px !important}
    .wrap{padding-top:16px !important}
    .container{padding-top:16px !important;padding-bottom:16px !important}
    .page-header{padding-top:16px !important;padding-bottom:8px !important}
    .doc-section{margin-bottom:16px !important}
    .section{padding-top:4px !important;padding-bottom:4px !important}
    h2{margin-top:8px !important;margin-bottom:8px !important}
}