:root{--bg:#070b12;--panel:#0d1420;--line:rgba(255,255,255,.1);--text:#f3f6fc;--muted:#9ba9bd;--blue:#58a6ff;--cyan:#72d5ff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}.muted{color:var(--muted)}.tiny{font-size:.8rem}.blue{color:var(--blue)}.white{color:#fff}.eyebrow{font-size:.72rem;letter-spacing:.2em;color:var(--cyan);font-weight:800}.topbar{height:76px;position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:24px;padding:0 5%;background:rgba(7,11,18,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.logo,.brand-mark{font-size:1.6rem;font-weight:950;letter-spacing:-.08em}.logo span,.brand-mark span{color:var(--blue)}#nav{display:flex;align-items:center;gap:clamp(10px,1.5vw,24px);margin:auto;font-size:.84rem;color:#c8d2e0}#nav a:hover{color:var(--blue)}.account{display:flex;align-items:center;gap:10px;font-size:.8rem}.account span{color:var(--cyan)}.primary,.secondary{border:0;border-radius:12px;padding:11px 16px;font-weight:750;display:inline-flex;justify-content:center;align-items:center;gap:10px}.primary{background:var(--blue);color:#07111d}.primary:hover{background:#82bdff}.secondary{background:#172233;color:var(--text);border:1px solid var(--line)}.nav-toggle{display:none}.hero{min-height:calc(100svh - 76px);display:grid;align-items:center;position:relative;overflow:hidden;padding:10vh 8%}.hero-bg{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,7,14,.78),rgba(3,7,14,.42)),linear-gradient(0deg,rgba(3,7,14,.58),rgba(3,7,14,.12)),url('assets/foto-sekelas.jpg') center/cover no-repeat;filter:saturate(.85)}.hero-content{position:relative;z-index:1;max-width:900px}.hero h1{font-size:clamp(4rem,12vw,9rem);line-height:.94;letter-spacing:-.075em;margin:18px 0 22px;font-weight:950}.lead{color:#d4deeb;font-size:clamp(1rem,2vw,1.35rem);min-height:2em}.scroll-note{position:absolute;bottom:28px;left:8%;font-size:.68rem;letter-spacing:.18em;color:var(--muted)}.section{padding:100px 8%;border-top:1px solid rgba(255,255,255,.05)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:38px}.section-head h2,.about h2{font-size:clamp(2.3rem,5vw,4rem);line-height:1.08;letter-spacing:-.05em;margin:6px 0}.section-head>p{max-width:400px;color:var(--muted);margin:0}.subheading{margin:32px 0 14px;font-size:1.1rem}.video-title{margin-top:38px}.photo-track,.video-track{overflow-x:auto;scrollbar-width:thin;scrollbar-color:#2e4c70 transparent;cursor:grab;touch-action:pan-x;user-select:none}.photo-track:active,.video-track:active{cursor:grabbing}.photo-items,.video-items{display:flex;gap:14px;width:max-content;padding:5px 1px 16px}.memory-card{width:clamp(220px,28vw,360px);height:230px;border-radius:18px;overflow:hidden;background:#111b2a;border:1px solid var(--line);position:relative;flex-shrink:0}.memory-card img,.memory-card video{width:100%;height:100%;object-fit:cover;display:block}.memory-card figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;background:linear-gradient(transparent,rgba(0,0,0,.8));font-size:.82rem}.empty-tile{width:280px;min-height:150px;border:1px dashed #30415a;border-radius:16px;display:grid;place-items:center;text-align:center;padding:20px;color:var(--muted)}.org-chart{max-width:1000px;margin:auto;text-align:center}.org-node{padding:17px;border:1px solid #355578;border-radius:14px;background:linear-gradient(135deg,#101d2d,#0b111b);font-weight:850;letter-spacing:.05em}.org-node small{display:block;font-weight:500;color:var(--muted);letter-spacing:0}.org-node.head{max-width:520px;margin:auto}.org-node.teacher{max-width:460px;margin:auto}.org-line{height:25px;width:1px;background:#42658b;margin:auto}.org-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.member-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.member{border:1px solid var(--line);border-radius:14px;padding:16px;background:linear-gradient(145deg,#101927,#0a1019);min-height:110px}.member .num{font-size:.72rem;color:var(--blue)}.member strong{display:block;font-size:.9rem;margin-top:6px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;min-width:480px}th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line)}th{background:#111b29;color:#b7c9df;font-size:.8rem}td{font-size:.9rem}tbody tr:last-child td{border-bottom:0}.duty-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.duty-card,.stat,.admin-card{padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}.duty-card h4{margin:0 0 10px;color:var(--cyan)}.duty-card p{color:var(--muted);white-space:pre-line;margin:0}.cash-toolbar{display:flex;align-items:end;gap:14px;flex-wrap:wrap;margin-bottom:20px}.cash-toolbar label,.admin-card label,.auth-card label{display:grid;gap:6px;color:#c7d2e2;font-size:.85rem}.cash-toolbar select,.admin-card input,.auth-card input{background:#080e17;color:var(--text);border:1px solid #29384c;padding:11px 12px;border-radius:10px;min-width:180px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}.stat span{display:block;color:var(--muted);font-size:.8rem}.stat strong{font-size:1.6rem}.pay-check{width:19px;height:19px;accent-color:var(--blue)}.about{min-height:360px;background:radial-gradient(ellipse at 80% 30%,rgba(39,105,170,.16),transparent 45%)}.about>p:last-child{color:var(--muted);max-width:520px}.footer{padding:26px 8%;display:flex;justify-content:space-between;color:var(--muted);font-size:.78rem;border-top:1px solid var(--line)}.auth-screen{min-height:100svh;display:grid;place-items:center;padding:22px;background:radial-gradient(ellipse at top right,#122d4a 0,transparent 42%),var(--bg)}.auth-card{width:min(100%,430px);border:1px solid var(--line);background:rgba(12,19,30,.94);border-radius:24px;padding:30px;box-shadow:0 30px 90px #0005}.auth-card h1{font-size:2rem;letter-spacing:-.04em;margin:4px 0}.auth-card form{display:grid;gap:15px}.auth-card input{width:100%;margin-top:3px}.brand-mark{font-size:2rem}.tabs{display:flex;gap:8px;margin:22px 0}.tab{flex:1;padding:10px;border:1px solid var(--line);background:#0a111b;color:var(--muted);border-radius:10px}.tab.active{background:#19314a;color:white;border-color:#416a91}.full{width:100%;margin-top:4px}.message{min-height:1.3em;color:var(--cyan);font-size:.88rem}.notice{padding:14px;border:1px solid #315777;background:#0e1d2d;color:#c6e3ff;border-radius:12px;margin-bottom:20px}.admin-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.admin-card{display:grid;align-content:start;gap:12px}.admin-card h3{margin:0}.admin-card .primary,.admin-card .secondary{justify-self:start}.section-anchor{scroll-margin-top:82px}
@media(max-width:1000px){#nav{gap:10px;font-size:.75rem}.topbar{padding:0 3%;gap:12px}.member-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:760px){.topbar{height:68px}.nav-toggle{display:inline-flex;margin-left:auto}.account{margin-left:auto}.account span{display:none}#nav{display:none;position:absolute;top:68px;left:0;right:0;padding:18px;background:#09111c;border-bottom:1px solid var(--line);grid-template-columns:repeat(2,1fr);font-size:.9rem}#nav.open{display:grid}.hero{min-height:calc(100svh - 68px);padding:8vh 6%}.hero h1{font-size:clamp(3.7rem,15vw,7rem)}.section{padding:70px 6%}.section-head{display:block}.section-head>p{margin-top:15px}.member-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.org-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.duty-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stats{grid-template-columns:1fr}.admin-grid{grid-template-columns:1fr}.memory-card{width:78vw;height:210px}.footer{padding:22px 6%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Responsive lesson cards and public/no-login layout */
.lesson-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;align-items:start}.lesson-card{min-width:0;padding:16px;border:1px solid var(--line);border-radius:15px;background:linear-gradient(145deg,#101927,#0a1019);overflow-wrap:anywhere}.lesson-card h3{margin:0 0 12px;color:var(--cyan)}.lesson-card p{margin:8px 0;white-space:pre-wrap}.hero-content{width:min(100%,850px);margin-inline:auto;text-align:center}.hero-content h1{overflow-wrap:anywhere}.org-chart>.teacher{margin-inline:auto}.org-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topbar{justify-content:space-between}.photo-track,.video-track{touch-action:pan-y}.memory-card img,.memory-card video{object-fit:cover;max-width:100%}@media(max-width:1000px){.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.org-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:760px){.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.org-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-content{text-align:center;width:100%}}@media(max-width:420px){.lesson-grid{grid-template-columns:1fr}.org-grid{grid-template-columns:1fr}.hero-content h1{font-size:clamp(2.7rem,14vw,4.5rem)}}

.owner-wrap{max-width:1180px;margin:auto;padding:28px 5% 70px;min-height:100svh}.owner-gate{margin:8vh auto 0}.owner-wrap h1{letter-spacing:-.04em}.owner-menu{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.owner-menu .admin-card{min-width:0}.owner-menu textarea{width:100%;background:#080e17;color:var(--text);border:1px solid #29384c;border-radius:10px;padding:11px;resize:vertical}.editor-list{display:grid;gap:8px;margin-top:8px}.editor-row{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:8px;font-size:.9rem;overflow-wrap:anywhere}.editor-row button{flex-shrink:0}.owner-wrap input,.owner-wrap select{max-width:100%}@media(max-width:700px){.owner-menu{grid-template-columns:1fr}.owner-wrap{padding:20px 5% 50px}.section-head{gap:16px}}

/* Landscape desktop/tablet navigation: separate outlined tap targets. */
@media (orientation: landscape) and (min-width: 761px){
  #nav{margin-left:auto;margin-right:12px;gap:8px;}
  #nav a{display:inline-flex;align-items:center;justify-content:center;padding:8px 11px;border:1px solid rgba(114,213,255,.28);border-radius:10px;white-space:nowrap;transition:border-color .18s ease,background .18s ease;}
  #nav a:hover,#nav a:focus-visible{border-color:var(--blue);background:rgba(88,166,255,.1);outline:none;}
}
.owner-wrap .cash-toggle-label{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:1rem}.owner-wrap .cash-toggle-label input{min-width:19px;width:19px;height:19px;margin:0;flex-shrink:0}

/* Upgrade X.3: navigasi dan struktur organisasi */
.org-chart{display:flex;flex-direction:column;align-items:center;gap:10px}.org-chart>.teacher{width:min(100%,420px)}.arrow-line{height:28px;display:flex;align-items:center;justify-content:center;color:#60a5fa;font-size:25px;line-height:1}.org-grid{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.org-node{min-width:0;overflow-wrap:anywhere;text-align:center}.org-grid .org-node{position:relative;min-height:78px;display:flex;flex-direction:column;justify-content:center;gap:7px}.org-grid .org-node small{display:block}.nav-toggle{flex-shrink:0}@media(max-width:640px){.org-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.org-grid .org-node{padding:14px 8px;font-size:12px}.org-grid .org-node small{font-size:11px}}

/* X.3 consistent dark controls and multi-file preview */
:root{color-scheme:dark}
select,option{color-scheme:dark;background-color:#0b1422;color:#edf4ff}
.owner-wrap select,.owner-wrap input:not([type=file]),.owner-wrap textarea,.auth-card input{color-scheme:dark;background:#080e17;color:var(--text);border:1px solid #29384c;border-radius:11px;padding:12px;outline:none}
.owner-wrap select:focus,.owner-wrap input:focus,.owner-wrap textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #58a6ff22}
.file-picker{display:flex!important;flex-direction:row;align-items:center;justify-content:space-between;gap:12px;padding:13px;background:#080e17;border:1px solid #29384c;border-radius:12px;cursor:pointer;min-height:54px}
.file-picker input[type=file]{position:absolute!important;width:1px!important;height:1px!important;opacity:0!important;overflow:hidden!important;pointer-events:none}
.file-picker .secondary{white-space:nowrap;font-size:.85rem}
.media-preview{display:grid;grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:12px;min-width:0}
.media-preview:empty{display:none}
.preview-item{min-width:0;overflow:hidden;border:1px solid var(--line);border-radius:13px;background:#080e17;padding:8px;display:grid;gap:8px}
.preview-media{height:125px;border-radius:8px;overflow:hidden;background:#050a11;display:grid;place-items:center}
.preview-media img,.preview-media video{display:block;width:100%;height:100%;object-fit:contain;background:#050a11}
.preview-caption{display:grid;gap:2px;min-width:0}.preview-caption span{font-size:.8rem;overflow-wrap:anywhere}.preview-caption small{color:var(--muted);font-size:.72rem}
.preview-item .secondary{font-size:.78rem;padding:7px 9px;justify-self:stretch}
.upload-actions{display:flex;flex-wrap:wrap;gap:9px;align-items:center}
.message{white-space:pre-wrap;overflow-wrap:anywhere}.message:not(:empty){padding:8px 0}
@media(max-width:420px){.media-preview{grid-template-columns:repeat(2,minmax(0,1fr))}.preview-media{height:105px}.file-picker{align-items:flex-start;flex-direction:column}}

/* Perbaikan struktur organisasi: jabatan inti terpisah dari seksi-seksi */
.org-chart>.org-grid{display:block;width:100%;max-width:900px;margin:0 auto}
.org-branch{max-width:760px;margin:0 auto}
.org-branch-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:12px 0}
.org-branch-arrows{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));color:var(--blue);font-size:1.5rem;line-height:1;text-align:center}
.org-sections{max-width:900px;margin:30px auto 0;padding-top:22px;border-top:1px solid #263b57}
.org-sections h3{margin:0 0 14px;color:var(--cyan);letter-spacing:.12em;font-size:1rem}
.org-sections .org-branch-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.org-node{color:var(--text)}
select{appearance:none;-webkit-appearance:none;background-color:#0b1422!important;color:#edf4ff!important;border:1px solid #355578!important;border-radius:11px!important;padding:12px 42px 12px 14px!important;background-image:linear-gradient(45deg,transparent 50%,#72d5ff 50%),linear-gradient(135deg,#72d5ff 50%,transparent 50%)!important;background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%!important;background-size:6px 6px,6px 6px!important;background-repeat:no-repeat!important}
select:focus{outline:none;border-color:#58a6ff!important;box-shadow:0 0 0 3px #58a6ff25}
select option{background:#0b1422!important;color:#edf4ff!important}
@media(max-width:640px){.org-branch-grid,.org-sections .org-branch-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.org-branch-grid .org-node{padding:14px 8px;font-size:12px}.org-branch-grid .org-node small{font-size:11px}.org-sections{margin-top:24px}}
/* Dialog dan notifikasi bertema X.3, tanpa alert/prompt browser */
.x3-dialog-backdrop{display:none;position:fixed;inset:0;z-index:9999;background:rgba(1,5,12,.78);backdrop-filter:blur(8px);align-items:center;justify-content:center;padding:20px}.x3-dialog-backdrop.open{display:flex}.x3-dialog{width:min(100%,390px);padding:24px;border:1px solid #294a6d;border-radius:20px;background:linear-gradient(145deg,#101d2d,#080e17);box-shadow:0 24px 80px #0009;display:grid;gap:18px}.x3-dialog h3{margin:0;color:var(--text)}.x3-dialog input{width:100%;background:#070d16;color:var(--text);border:1px solid #2c4562;border-radius:10px;padding:12px}.x3-dialog>div{display:flex;justify-content:flex-end;gap:10px}.x3-toast{position:fixed;z-index:10000;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;pointer-events:none;max-width:calc(100vw - 28px);padding:12px 18px;border:1px solid #315777;border-radius:13px;background:#0d1b2b;color:#d9edff;box-shadow:0 12px 35px #0008;transition:.2s}.x3-toast.show{opacity:1;transform:translate(-50%,0)}.check-line{display:flex!important;align-items:center;gap:10px!important}.check-line input{min-width:auto!important;width:18px;height:18px;accent-color:var(--blue)}


/* Scroll reveal X.3: muncul saat masuk viewport, memudar saat ditinggalkan */
.scroll-reveal{opacity:0;transform:translateY(22px);transition:opacity .65s ease var(--reveal-delay,0ms),transform .65s cubic-bezier(.2,.7,.2,1) var(--reveal-delay,0ms);will-change:opacity,transform}
.scroll-reveal.revealed{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){.scroll-reveal{opacity:1;transform:none;transition:none;will-change:auto}}


/* Upgrade visual X.3: background neon bergerak tetap di viewport saat halaman di-scroll */
body{background:#040914;isolation:isolate}
#app{position:relative;z-index:1}
.ambient-bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;background:radial-gradient(ellipse at 15% 15%,rgba(0,91,210,.13),transparent 34%),radial-gradient(ellipse at 85% 72%,rgba(0,174,255,.10),transparent 38%),linear-gradient(145deg,#030711 0%,#071326 48%,#030711 100%)}
.ambient-bg:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(48,123,214,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(48,123,214,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,transparent,#000 18%,#000 85%,transparent);opacity:.7}
.ambient-panel{position:absolute;display:block;height:clamp(24px,5vw,68px);width:clamp(150px,30vw,420px);border:1px solid rgba(38,139,255,.42);background:linear-gradient(100deg,rgba(0,78,180,.025),rgba(13,112,255,.16),rgba(0,195,255,.04));box-shadow:inset 0 0 24px rgba(0,117,255,.08),0 0 20px rgba(0,101,255,.05);clip-path:polygon(0 0,94% 0,100% 100%,5% 100%);opacity:.55;will-change:transform}
.panel-a{top:8%;left:-28%;animation:panelDriftA 27s linear infinite}
.panel-b{top:23%;left:58%;height:32px;animation:panelDriftB 34s linear infinite}
.panel-c{top:43%;left:-20%;height:48px;animation:panelDriftC 31s linear infinite}
.panel-d{top:63%;left:73%;height:26px;animation:panelDriftD 29s linear infinite}
.panel-e{top:79%;left:-25%;height:58px;animation:panelDriftB 37s linear infinite reverse}
.panel-f{top:91%;left:62%;height:22px;animation:panelDriftA 32s linear infinite reverse}
.ambient-glow{position:absolute;width:34vw;height:34vw;min-width:180px;min-height:180px;border-radius:50%;filter:blur(70px);opacity:.14;background:#006eff;animation:glowBreathe 10s ease-in-out infinite alternate}
.glow-a{top:-14%;left:-10%}.glow-b{right:-12%;bottom:-18%;background:#00bfff;animation-delay:-5s}
.ambient-dots{position:absolute;inset:0;opacity:.45;background-image:radial-gradient(circle,rgba(92,181,255,.9) 1px,transparent 1.7px),radial-gradient(circle,rgba(30,105,255,.8) 1px,transparent 1.8px);background-size:137px 173px,211px 229px;background-position:12px 20px,80px 90px;animation:dotsSlide 48s linear infinite}
.org-node{position:relative;overflow:hidden;border-color:rgba(70,157,255,.42);background:linear-gradient(145deg,rgba(11,29,53,.94),rgba(5,12,26,.96));box-shadow:inset 0 1px rgba(127,204,255,.06),0 8px 26px rgba(0,0,0,.16);transition:border-color .25s,box-shadow .25s,transform .25s}
.org-node:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(115deg,transparent 20%,rgba(46,151,255,.08) 48%,transparent 72%);transform:translateX(-120%);animation:nodeSheen 8s ease-in-out infinite}
.org-node:hover{border-color:#39baff;box-shadow:0 0 24px rgba(0,137,255,.14);transform:translateY(-2px)}
.org-node.teacher{border-color:rgba(64,174,255,.65);box-shadow:0 0 28px rgba(0,110,255,.1),inset 0 0 25px rgba(0,110,255,.06)}
.org-line{background:linear-gradient(to bottom,#1d74ff,#44dcff);box-shadow:0 0 10px rgba(44,178,255,.6)}
.org-sections{border-top-color:rgba(69,145,224,.28)}
@keyframes panelDriftA{from{transform:translate3d(0,0,0) rotate(-7deg)}to{transform:translate3d(150vw,35px,0) rotate(-7deg)}}
@keyframes panelDriftB{from{transform:translate3d(0,0,0) rotate(8deg)}to{transform:translate3d(-150vw,-28px,0) rotate(8deg)}}
@keyframes panelDriftC{from{transform:translate3d(0,0,0) rotate(5deg)}to{transform:translate3d(145vw,-42px,0) rotate(5deg)}}
@keyframes panelDriftD{from{transform:translate3d(0,0,0) rotate(-4deg)}to{transform:translate3d(-145vw,22px,0) rotate(-4deg)}}
@keyframes glowBreathe{from{transform:scale(.85);opacity:.09}to{transform:scale(1.18);opacity:.19}}
@keyframes dotsSlide{from{transform:translate3d(0,0,0)}to{transform:translate3d(-80px,-140px,0)}}
@keyframes nodeSheen{0%,65%,100%{transform:translateX(-120%)}82%{transform:translateX(120%)}}
@media(prefers-reduced-motion:reduce){.ambient-glow,.ambient-dots,.org-node:before{animation:none!important}.ambient-panel{animation-play-state:running!important}.org-node{transition:none}}
@media(max-width:640px){.ambient-panel{opacity:.35}.ambient-glow{filter:blur(48px);opacity:.11}.org-node:hover{transform:none}}

/* Memory video: marquee otomatis berlawanan arah dengan foto */
.video-items{will-change:scroll-position}
.video-marquee-copy{pointer-events:auto}
.video-track video{user-select:auto}
@media(prefers-reduced-motion:reduce){.video-items{will-change:auto}}

/* Cohesive visual pass: sambungkan hero foto dengan ambient background seluruh halaman */
:root{--bg:#050a12;--panel:#0b1320;--blue:#68adff;--cyan:#78d8f2}
body{background:#050a12}
.ambient-bg{
  background:
    radial-gradient(ellipse at 72% 28%,rgba(16,86,139,.10),transparent 46%),
    radial-gradient(ellipse at 18% 78%,rgba(20,66,135,.10),transparent 42%),
    linear-gradient(180deg,#050a12 0%,#07101c 48%,#050a12 100%);
}
.ambient-bg:before{opacity:.28;background-size:64px 64px;background-image:linear-gradient(rgba(83,145,207,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(83,145,207,.025) 1px,transparent 1px)}
.ambient-panel{opacity:.24;border-color:rgba(69,145,213,.28);background:linear-gradient(100deg,rgba(10,56,103,.015),rgba(31,112,175,.075),rgba(44,166,194,.025));box-shadow:inset 0 0 18px rgba(0,117,255,.025),0 0 14px rgba(0,101,255,.025)}
.ambient-glow{opacity:.075;filter:blur(86px)}
.ambient-dots{opacity:.19}
.hero{background:linear-gradient(180deg,rgba(5,10,18,.08) 0%,rgba(5,10,18,.12) 58%,#050a12 100%)}
.hero-bg{filter:saturate(.68);background-image:linear-gradient(90deg,rgba(3,7,14,.88),rgba(3,7,14,.42)),linear-gradient(0deg,#050a12 0%,rgba(5,10,18,.28) 28%,rgba(3,7,14,.24) 100%),url('assets/foto-sekelas.jpg');}
.hero:after{content:"";position:absolute;z-index:0;pointer-events:none;left:0;right:0;bottom:-1px;height:clamp(100px,18vh,210px);background:linear-gradient(180deg,rgba(5,10,18,0),rgba(5,10,18,.62) 58%,#050a12 100%)}
.hero-content,.scroll-note{z-index:1}
.section{position:relative;background:transparent;border-top-color:rgba(104,160,211,.035)}
.section-head>p,.lead,.scroll-note{color:#aab9cb}
.org-node{border-color:rgba(87,145,199,.30);background:linear-gradient(145deg,rgba(13,26,42,.90),rgba(7,14,24,.94));box-shadow:inset 0 1px rgba(127,204,255,.035),0 8px 26px rgba(0,0,0,.12)}
.org-node.teacher{border-color:rgba(91,166,224,.46);box-shadow:0 0 22px rgba(0,110,255,.055),inset 0 0 20px rgba(0,110,255,.035)}
.org-line{background:linear-gradient(to bottom,#367bc3,#55c5df);box-shadow:0 0 7px rgba(44,178,255,.28)}
.memory-card{border-color:rgba(125,164,202,.14);box-shadow:0 10px 32px rgba(0,0,0,.12)}
.topbar{background:rgba(5,10,18,.83);border-bottom-color:rgba(130,168,204,.09)}
@media(max-width:640px){.ambient-panel{opacity:.20}.ambient-glow{filter:blur(60px);opacity:.065}.hero:after{height:140px}}



/* Background natural: floating glass panels, subtle contrast, continuous motion */
.ambient-bg{
 position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;
 background:
  radial-gradient(ellipse at 16% 12%,rgba(33,91,155,.12),transparent 38%),
  radial-gradient(ellipse at 84% 76%,rgba(27,104,143,.09),transparent 42%),
  linear-gradient(145deg,#050a12 0%,#07111f 52%,#050a12 100%);
}
.ambient-bg:before{
 content:"";position:absolute;inset:0;
 background-image:linear-gradient(rgba(115,158,203,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(115,158,203,.018) 1px,transparent 1px);
 background-size:64px 64px;opacity:.42;
}
.ambient-panel{
 position:absolute;display:block;pointer-events:none;
 height:clamp(18px,2.8vw,38px);width:clamp(180px,30vw,390px);
 border:1px solid rgba(105,164,215,.17);
 background:linear-gradient(100deg,rgba(25,65,104,.035),rgba(55,111,163,.085) 48%,rgba(75,145,181,.045));
 box-shadow:inset 0 1px rgba(173,213,245,.045),0 0 12px rgba(42,108,163,.035);
 clip-path:polygon(0 0,96% 0,100% 100%,4% 100%);
 opacity:.30;will-change:transform;backface-visibility:hidden;
}
.ambient-bg .panel-a{top:7%;left:-30%;animation:panelDriftA 42s linear infinite}
.ambient-bg .panel-b{top:16%;left:68%;height:24px;animation:panelDriftB 48s linear infinite}
.ambient-bg .panel-c{top:28%;left:-26%;height:32px;animation:panelDriftC 45s linear infinite}
.ambient-bg .panel-d{top:39%;left:73%;height:22px;animation:panelDriftD 43s linear infinite}
.ambient-bg .panel-e{top:49%;left:-30%;height:36px;animation:panelDriftB 49s linear infinite reverse}
.ambient-bg .panel-f{top:59%;left:69%;height:20px;animation:panelDriftA 46s linear infinite reverse}
.ambient-bg .panel-g{top:68%;left:-28%;height:29px;animation:panelDriftD 44s linear infinite}
.ambient-bg .panel-h{top:78%;left:74%;height:34px;animation:panelDriftC 47s linear infinite reverse}
.ambient-bg .panel-i{top:88%;left:-30%;height:22px;animation:panelDriftA 45s linear infinite}
.ambient-bg .panel-j{top:95%;left:70%;height:26px;animation:panelDriftB 50s linear infinite}
.ambient-bg .panel-k{top:22%;left:-24%;height:19px;width:clamp(140px,22vw,270px);animation:panelDriftC 52s linear infinite reverse}
.ambient-bg .panel-l{top:34%;left:45%;height:18px;width:clamp(130px,20vw,250px);animation:panelDriftD 49s linear infinite}
.ambient-bg .panel-m{top:44%;left:18%;height:23px;width:clamp(150px,24vw,300px);animation:panelDriftA 51s linear infinite reverse}
.ambient-bg .panel-n{top:64%;left:42%;height:19px;width:clamp(130px,21vw,260px);animation:panelDriftB 47s linear infinite reverse}
.ambient-bg .panel-o{top:73%;left:18%;height:24px;width:clamp(140px,22vw,280px);animation:panelDriftC 53s linear infinite}
.ambient-bg .panel-p{top:84%;left:53%;height:18px;width:clamp(140px,22vw,270px);animation:panelDriftD 48s linear infinite reverse}
.ambient-bg .panel-q{top:12%;left:42%;height:17px;width:clamp(120px,18vw,220px);animation:panelDriftB 54s linear infinite reverse}
.ambient-bg .panel-r{top:55%;left:-12%;height:20px;width:clamp(150px,24vw,300px);animation:panelDriftA 50s linear infinite}
@keyframes panelDriftA{0%{transform:translate3d(-4vw,0,0) rotate(-3deg)}100%{transform:translate3d(145vw,14px,0) rotate(-3deg)}}
@keyframes panelDriftB{0%{transform:translate3d(0,0,0) rotate(3deg)}100%{transform:translate3d(-145vw,-12px,0) rotate(3deg)}}
@keyframes panelDriftC{0%{transform:translate3d(0,0,0) rotate(2deg)}100%{transform:translate3d(145vw,-10px,0) rotate(2deg)}}
@keyframes panelDriftD{0%{transform:translate3d(0,0,0) rotate(-2deg)}100%{transform:translate3d(-145vw,12px,0) rotate(-2deg)}}
.ambient-glow{opacity:.045;filter:blur(90px)}
.ambient-dots{opacity:.10}
@media(max-width:640px){
 .ambient-panel{opacity:.28;width:clamp(150px,48vw,270px);height:clamp(17px,3vw,26px)}
 .ambient-bg:before{background-size:52px 52px;opacity:.3}
}

/* Video preview: gunakan tombol play bawaan browser saja agar tidak dobel */
.memory-card.video-memory{background:#0b1420}
.memory-card.video-memory video{background:#0b1420;object-fit:cover}
.memory-card.video-memory::before,
.memory-card.video-memory::after{content:none!important;display:none!important}