/* =================================================================
   HANGUL ACADEMY — LMS / Student Portal
   Matches main site design system: Royal blue · Gold · Ivory
   ================================================================= */
:root{
  --ink:#0A1A33;--royal:#1C3F73;--royal-2:#274F8E;--royal-deep:#13294B;
  --gold:#C2982F;--gold-bright:#D9B65A;--gold-soft:#E7D3A1;--crimson:#B5302A;
  --ivory:#FBF8F1;--sand:#F3ECDC;--paper:#FFFFFF;--muted:#5A6373;
  --green:#1E7B4F;--green-soft:#E3F2EA;
  --line:rgba(10,26,51,.10);--line-gold:rgba(194,152,47,.35);
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Plus Jakarta Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --shadow-sm:0 2px 10px rgba(10,26,51,.06);
  --shadow:0 18px 50px -22px rgba(10,26,51,.30);
  --shadow-lg:0 30px 80px -30px rgba(10,26,51,.45);
  --r:16px;--maxw:1200px;--ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--ivory);line-height:1.6;font-size:16px;min-height:100vh}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--gold);color:var(--ink)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.12;color:var(--ink);letter-spacing:-.01em}
.container{width:min(94%,var(--maxw));margin-inline:auto}
.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--gold)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--sans);font-weight:700;font-size:.95rem;padding:.85rem 1.7rem;border-radius:50px;cursor:pointer;border:2px solid transparent;transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s,color .22s;white-space:nowrap}
.btn svg{width:17px;height:17px;flex-shrink:0}
.btn-gold{background:var(--gold);color:var(--ink);box-shadow:0 10px 26px -12px rgba(194,152,47,.8)}
.btn-gold:hover{background:var(--gold-bright);transform:translateY(-2px)}
.btn-royal{background:var(--royal);color:#fff}
.btn-royal:hover{background:var(--royal-2);transform:translateY(-2px)}
.btn-ghost-dark{background:transparent;color:var(--royal);border-color:var(--royal)}
.btn-ghost-dark:hover{background:var(--royal);color:#fff}
.btn-danger{background:transparent;color:var(--crimson);border-color:rgba(181,48,42,.4)}
.btn-danger:hover{background:var(--crimson);color:#fff;border-color:var(--crimson)}
.btn-sm{padding:.5rem 1.05rem;font-size:.82rem}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-block{width:100%}

/* ---------- Portal header ---------- */
.portal-header{position:sticky;top:0;z-index:900;background:rgba(251,248,241,.94);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line)}
.portal-nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:1rem}
.header-brand{display:flex;align-items:center;gap:.65rem;min-width:0}
.header-crest{height:44px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text .logo{font-family:var(--serif);font-weight:600;font-size:1.15rem;color:var(--royal);letter-spacing:.02em}
.brand-text .logo span{color:var(--gold)}
.brand-text small{font-size:.58rem;letter-spacing:.3em;text-transform:uppercase;color:var(--muted);margin-top:3px}
.portal-user{display:flex;align-items:center;gap:.9rem}
.user-chip{display:flex;align-items:center;gap:.6rem;background:var(--paper);border:1px solid var(--line);border-radius:50px;padding:.35rem .9rem .35rem .4rem;box-shadow:var(--shadow-sm)}
.user-avatar{width:34px;height:34px;border-radius:50%;background:var(--royal);color:var(--gold-bright);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;font-family:var(--serif)}
.user-chip .u-name{font-weight:700;font-size:.86rem;max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.user-chip .u-role{font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
.user-meta{display:flex;flex-direction:column;line-height:1.25}

/* ---------- Auth (login) ---------- */
.auth-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr 1fr}
.auth-side{position:relative;background:linear-gradient(150deg,var(--royal-deep),var(--royal) 60%,var(--royal-2));color:#fff;display:flex;flex-direction:column;justify-content:space-between;padding:3rem;overflow:hidden}
.auth-side::after{content:"";position:absolute;right:-120px;top:-120px;width:380px;height:380px;border:1px solid rgba(217,182,90,.35);transform:rotate(45deg)}
.auth-side::before{content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;border:1px solid rgba(217,182,90,.2);transform:rotate(45deg)}
.auth-side .brand-text .logo{color:#fff}
.auth-side .brand-text small{color:var(--gold-soft)}
.auth-side h1{color:#fff;font-size:clamp(1.9rem,3.4vw,2.8rem);max-width:14ch;margin-top:1rem}
.auth-side h1 em{font-style:italic;color:var(--gold-bright)}
.auth-side .side-sub{color:rgba(255,255,255,.85);max-width:42ch;margin-top:1rem}
.auth-points{list-style:none;margin-top:2rem;display:flex;flex-direction:column;gap:.8rem}
.auth-points li{display:flex;gap:.7rem;align-items:flex-start;color:rgba(255,255,255,.88);font-size:.95rem}
.auth-points li::before{content:"";width:8px;height:8px;background:var(--gold);transform:rotate(45deg);margin-top:.42rem;flex-shrink:0}
.auth-foot{font-size:.8rem;color:rgba(255,255,255,.55)}
.auth-form-col{display:flex;align-items:center;justify-content:center;padding:2.5rem 1.5rem}
.auth-card{width:min(430px,100%)}
.auth-card h2{font-size:1.9rem;margin:.6rem 0 .4rem}
.auth-card .sub{color:var(--muted);font-size:.95rem;margin-bottom:1.8rem}

/* ---------- Forms ---------- */
.field{margin-bottom:1.1rem}
.field label{display:block;font-weight:700;font-size:.82rem;letter-spacing:.04em;margin-bottom:.4rem;color:var(--ink)}
.field input,.field select,.field textarea{width:100%;font-family:var(--sans);font-size:.95rem;color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:12px;padding:.8rem 1rem;transition:border-color .2s,box-shadow .2s;outline:none}
.field textarea{resize:vertical;min-height:90px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(194,152,47,.18)}
.field .hint{font-size:.76rem;color:var(--muted);margin-top:.3rem}
.form-msg{display:none;border-radius:12px;padding:.8rem 1rem;font-size:.88rem;font-weight:600;margin-bottom:1rem}
.form-msg.error{display:block;background:rgba(181,48,42,.08);color:var(--crimson);border:1px solid rgba(181,48,42,.25)}
.form-msg.success{display:block;background:var(--green-soft);color:var(--green);border:1px solid rgba(30,123,79,.25)}

/* ---------- Page scaffold ---------- */
.page-head{padding:2.6rem 0 1.6rem}
.page-head h1{font-size:clamp(1.7rem,3.2vw,2.5rem);margin-top:.5rem}
.page-head .sub{color:var(--muted);margin-top:.5rem;max-width:60ch}
.section-pad{padding-bottom:4rem}

/* ---------- Cards / grids ---------- */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:1.6rem}
.grid-classes{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.4rem}
.class-card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:1.7rem;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;overflow:hidden}
.class-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--gold),var(--gold-bright))}
.class-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--line-gold)}
.class-card h3{font-size:1.3rem;margin:.7rem 0 .35rem}
.class-card .c-lang{font-size:.72rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
.class-card .c-desc{font-size:.9rem;color:var(--muted);min-height:2.6em}
.class-card .c-meta{display:flex;align-items:center;gap:.6rem;margin-top:1.1rem;font-size:.8rem;font-weight:700;color:var(--royal)}
.class-card .c-meta .dot{width:6px;height:6px;background:var(--gold);transform:rotate(45deg)}

/* ---------- Lecture list ---------- */
.lecture-list{display:flex;flex-direction:column;gap:.9rem}
.lecture-item{display:flex;align-items:center;gap:1.1rem;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.3rem;transition:transform .2s var(--ease),box-shadow .2s,border-color .2s;cursor:pointer}
.lecture-item:hover{transform:translateX(4px);box-shadow:var(--shadow-sm);border-color:var(--line-gold)}
.lec-num{flex-shrink:0;width:46px;height:46px;border-radius:12px;background:var(--sand);color:var(--royal);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:600;font-size:1.05rem}
.lec-body{flex:1;min-width:0}
.lec-body h4{font-size:1.02rem;font-family:var(--sans);font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lec-body .lec-date{font-size:.78rem;color:var(--muted);margin-top:.15rem}
.lec-play{flex-shrink:0;width:42px;height:42px;border-radius:50%;background:var(--royal);color:#fff;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .2s}
.lecture-item:hover .lec-play{background:var(--gold);color:var(--ink);transform:scale(1.08)}
.lec-play svg{width:16px;height:16px;margin-left:2px}

/* ---------- Player ---------- */
.player-shell{background:var(--royal-deep);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-lg)}
.player-frame{position:relative;width:100%;aspect-ratio:16/9;background:#000}
.player-frame iframe,.player-frame video{position:absolute;inset:0;width:100%;height:100%;border:0}
.player-external{aspect-ratio:auto;padding:3.2rem 1.5rem;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;text-align:center;color:#fff;position:static}
.player-external p{color:rgba(255,255,255,.8);max-width:46ch;font-size:.92rem}
.player-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.4rem;color:#fff;flex-wrap:wrap}
.player-bar h3{color:#fff;font-size:1.1rem;font-family:var(--sans);font-weight:700}
.player-bar .p-date{font-size:.78rem;color:var(--gold-soft)}
.lec-notes{background:var(--sand);border:1px solid var(--line-gold);border-radius:var(--r);padding:1.1rem 1.3rem;font-size:.92rem;margin-top:1rem}
.lec-notes strong{color:var(--royal)}

/* ---------- Breadcrumb / back ---------- */
.back-link{display:inline-flex;align-items:center;gap:.45rem;font-weight:700;font-size:.86rem;color:var(--royal);margin-bottom:1rem;cursor:pointer;background:none;border:none;font-family:var(--sans)}
.back-link:hover{color:var(--gold)}
.back-link svg{width:15px;height:15px}

/* ---------- Empty / loading ---------- */
.empty-state{text-align:center;padding:4rem 1.5rem;color:var(--muted)}
.empty-state .glyph{width:66px;height:66px;margin:0 auto 1.1rem;border-radius:18px;background:var(--sand);display:flex;align-items:center;justify-content:center;color:var(--gold)}
.empty-state .glyph svg{width:30px;height:30px}
.empty-state h3{font-size:1.25rem;margin-bottom:.4rem}
.loader{display:flex;justify-content:center;padding:3.5rem 0}
.loader i{width:38px;height:38px;border-radius:50%;border:3px solid var(--sand);border-top-color:var(--gold);animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Admin layout ---------- */
.admin-tabs{display:flex;gap:.4rem;background:var(--sand);border:1px solid var(--line);border-radius:50px;padding:.35rem;width:max-content;max-width:100%;overflow-x:auto;margin:1.4rem 0 2rem}
.admin-tabs button{font-family:var(--sans);font-weight:700;font-size:.88rem;color:var(--muted);background:transparent;border:none;border-radius:50px;padding:.6rem 1.35rem;cursor:pointer;transition:background .2s,color .2s;white-space:nowrap}
.admin-tabs button.active{background:var(--royal);color:#fff;box-shadow:var(--shadow-sm)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeUp .35s var(--ease)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.admin-grid{display:grid;grid-template-columns:400px 1fr;gap:1.6rem;align-items:start}
.card h3.card-title{font-size:1.2rem;margin-bottom:1.2rem;display:flex;align-items:center;gap:.55rem}
.card h3.card-title::before{content:"";width:8px;height:8px;background:var(--gold);transform:rotate(45deg)}

/* ---------- Tables / rows ---------- */
.data-rows{display:flex;flex-direction:column}
.data-row{display:flex;align-items:center;gap:1rem;padding:.95rem .35rem;border-bottom:1px solid var(--line)}
.data-row:last-child{border-bottom:none}
.data-row .d-main{flex:1;min-width:0}
.data-row .d-main .d-title{font-weight:700;font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.data-row .d-main .d-sub{font-size:.78rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.data-row .d-actions{display:flex;gap:.45rem;flex-shrink:0;flex-wrap:wrap;justify-content:flex-end}
.pill{display:inline-flex;align-items:center;font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;border-radius:50px;padding:.22rem .7rem}
.pill-gold{background:rgba(194,152,47,.14);color:var(--gold)}
.pill-royal{background:rgba(28,63,115,.1);color:var(--royal)}
.pill-green{background:var(--green-soft);color:var(--green)}
.pill-red{background:rgba(181,48,42,.1);color:var(--crimson)}
.search-bar{position:relative;margin-bottom:1rem}
.search-bar input{width:100%;font-family:var(--sans);font-size:.92rem;border:1.5px solid var(--line);border-radius:50px;padding:.7rem 1.1rem .7rem 2.6rem;background:var(--paper);outline:none}
.search-bar input:focus{border-color:var(--gold)}
.search-bar svg{position:absolute;left:1rem;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted)}
.checkbox-list{display:flex;flex-direction:column;gap:.35rem;max-height:250px;overflow-y:auto;border:1.5px solid var(--line);border-radius:12px;padding:.6rem}
.checkbox-list label{display:flex;align-items:center;gap:.6rem;font-size:.9rem;font-weight:600;padding:.45rem .5rem;border-radius:8px;cursor:pointer}
.checkbox-list label:hover{background:var(--sand)}
.checkbox-list input{accent-color:var(--gold);width:16px;height:16px}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1rem;margin-bottom:2rem}
.stat-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:1.2rem 1.4rem;box-shadow:var(--shadow-sm)}
.stat-card .s-num{font-family:var(--serif);font-size:2rem;font-weight:600;color:var(--royal)}
.stat-card .s-lbl{font-size:.74rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-top:.2rem}

/* ---------- Modal ---------- */
.modal-veil{position:fixed;inset:0;z-index:1200;background:rgba(10,26,51,.55);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:1.2rem}
.modal-veil.open{display:flex}
.modal{background:var(--paper);border-radius:var(--r);box-shadow:var(--shadow-lg);width:min(520px,100%);max-height:88vh;overflow-y:auto;padding:1.8rem;animation:fadeUp .3s var(--ease)}
.modal h3{font-size:1.35rem;margin-bottom:1.2rem}
.modal .modal-actions{display:flex;gap:.7rem;justify-content:flex-end;margin-top:1.4rem;flex-wrap:wrap}
.cred-box{background:var(--sand);border:1.5px dashed var(--gold);border-radius:12px;padding:1rem 1.2rem;font-size:.92rem;margin:.8rem 0;word-break:break-all}
.cred-box b{color:var(--royal)}

/* ---------- Footer ---------- */
.portal-foot{border-top:1px solid var(--line);padding:1.6rem 0;text-align:center;font-size:.8rem;color:var(--muted);margin-top:auto}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .auth-wrap{grid-template-columns:1fr}
  .auth-side{display:none}
  .admin-grid{grid-template-columns:1fr}
}
@media(max-width:620px){
  .portal-nav{height:auto;padding:.7rem 0;flex-wrap:wrap}
  .user-chip .u-name{max-width:90px}
  .data-row{flex-wrap:wrap}
  .data-row .d-actions{width:100%;justify-content:flex-start}
  .brand-text small{display:none}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}