*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:#1f2937;background:#f5f7fb}a{text-decoration:none;color:#4f46e5}.topbar{height:68px;background:#34206b;color:#fff;display:flex;align-items:center;padding:0 5%;box-shadow:0 3px 15px #1d17404a;position:sticky;top:0;z-index:50}.brand{font-size:24px;font-weight:800;color:#fff;margin-right:45px}.brand span{color:#a78bfa}.topbar nav{display:flex;gap:6px}.topbar nav a{color:#eee;padding:12px 16px;border-radius:10px}.topbar nav a:hover{background:#ffffff18}.layout{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 68px)}.sidebar{background:#fff;border-right:1px solid #e5e7eb;padding:24px 14px}.sidebar-title{font-weight:800;color:#34206b;padding:12px 14px 16px}.sidebar>a{display:block;padding:12px 14px;color:#64748b;border-radius:9px;margin:4px 0}.sidebar>a:hover,.sidebar>a.selected{background:#f0edff;color:#4f46e5;font-weight:700}.sidebar-help{margin:28px 8px;padding:16px;background:linear-gradient(135deg,#f0edff,#fff);border:1px solid #e6e1ff;border-radius:14px;color:#4b5563;line-height:1.5}.main{max-width:1250px;width:100%;padding:32px 4%;margin:auto}.hero{background:linear-gradient(135deg,#38216f,#6952c7);color:#fff;border-radius:24px;padding:42px 45px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 16px 35px #43308425}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:800;color:#a78bfa}.hero .eyebrow{color:#ddd5ff}.hero h1{font-size:38px;margin:8px 0}.hero p{max-width:700px;color:#e8e4ff;font-size:17px;line-height:1.6}.hero-art{font-size:85px;color:#c4b5fd}.search{display:flex;gap:10px;margin:24px 0}.search input,.admin-form input,.admin-form textarea,.admin-form select,.subject-picker select{width:100%;padding:13px 15px;border:1px solid #dbe0ea;border-radius:10px;background:#fff;font:inherit;outline:none}.search input:focus,.admin-form input:focus,.admin-form textarea:focus,.admin-form select:focus{border-color:#8b5cf6;box-shadow:0 0 0 3px #8b5cf620}.search button,.button,.admin-form button,.login-card button{background:#5b3bb7;color:#fff;border:0;border-radius:10px;padding:12px 18px;cursor:pointer;font-weight:700}.button.secondary{background:#eef0f6;color:#374151}.section-title{display:flex;justify-content:space-between;align-items:end;margin:38px 0 17px}.section-title>div{display:flex;gap:12px;align-items:center}.section-title span{color:#8b5cf6;font-weight:900}.section-title h2{margin:0;color:#29205a}.section-title em{color:#64748b;font-style:normal}.subject-grid,.unit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.subject-card,.unit-card{background:#fff;border:1px solid #e7e9ef;border-radius:17px;padding:20px;color:#1f2937;transition:.2s;box-shadow:0 5px 18px #26314d08}.subject-card:hover,.unit-card:hover,.unit-card.active{transform:translateY(-3px);border-color:#a78bfa;box-shadow:0 12px 28px #5b3bb718}.subject-card{display:flex;gap:14px}.subject-icon{width:48px;height:48px;border-radius:13px;background:#f1edff;display:grid;place-items:center;font-size:25px;flex:none}.subject-card h3,.unit-card h3{margin:0 0 7px;color:#34206b}.subject-card p,.unit-card p{margin:0 0 12px;color:#64748b;line-height:1.5;font-size:13px}.subject-card small{color:#8b5cf6;font-weight:700}.unit-card .unit-no{font-size:11px;font-weight:900;color:#8b5cf6;letter-spacing:1px}.note-card{background:#fff;border:1px solid #e7e9ef;border-radius:18px;padding:22px;margin:14px 0;box-shadow:0 6px 22px #26314d08}.note-top{display:flex;gap:8px;flex-wrap:wrap}.note-top span{background:#f0edff;color:#5b3bb7;padding:5px 9px;border-radius:20px;font-size:11px;font-weight:800}.note-card h3{font-size:21px;color:#29205a;margin:13px 0 8px}.summary{color:#64748b;line-height:1.6}.note-image{max-width:100%;max-height:420px;border-radius:12px;border:1px solid #e5e7eb;margin:12px 0}.note-card details{border-top:1px solid #eee;margin-top:15px;padding-top:13px}.note-card summary{cursor:pointer;color:#5b3bb7;font-weight:800}.note-content{padding-top:15px;line-height:1.8;color:#374151}.empty{background:#fff;border:1px dashed #cbd5e1;padding:35px;text-align:center;border-radius:15px;color:#64748b}footer{text-align:center;padding:25px;color:#64748b;background:#fff;border-top:1px solid #e5e7eb}.adminbar{min-height:68px;background:#29205a;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:12px 5%;gap:20px}.adminbar strong{font-size:20px}.adminbar small{display:block;color:#c4b5fd}.adminbar nav{display:flex;gap:10px}.adminbar a{color:#fff;background:#ffffff15;padding:9px 13px;border-radius:8px}.admin-main,.form-main{max-width:1200px;margin:auto;padding:35px 4%}.dashboard-head{display:flex;justify-content:space-between;gap:20px;align-items:center}.dashboard-head h1{margin:5px 0;color:#29205a}.dashboard-head p{color:#64748b}.admin-actions{display:flex;gap:9px;flex-wrap:wrap}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:25px 0}.stats div{background:#fff;padding:22px;border-radius:16px;border:1px solid #e7e9ef}.stats strong{display:block;font-size:30px;color:#5b3bb7}.stats span{color:#64748b}.admin-main h2{color:#29205a;margin-top:30px}.admin-subject-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.admin-subject,.panel{background:#fff;border:1px solid #e7e9ef;border-radius:16px;padding:20px}.admin-subject{display:flex;align-items:center;gap:14px}.admin-subject h3{margin:0;color:#34206b}.admin-subject p{margin:5px 0;color:#64748b}.admin-subject>a{margin-left:auto}.table-wrap{overflow:auto;background:#fff;border-radius:15px;border:1px solid #e7e9ef;margin-top:15px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid #eef0f4;white-space:nowrap}th{background:#f8f8fc;color:#4b5563;font-size:12px;text-transform:uppercase}td{color:#475569}.danger{color:#dc2626}.crud-grid{display:grid;grid-template-columns:360px 1fr;gap:20px}.admin-form{display:flex;flex-direction:column;gap:7px}.admin-form h1,.admin-form h2{color:#29205a;margin-top:0}.admin-form label{font-weight:700;color:#475569;margin-top:8px}.admin-form small{color:#64748b}.admin-form button{margin-top:12px;width:max-content}.list-row{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px solid #eee}.list-row>div{flex:1}.list-row small{display:block;color:#64748b;margin-top:3px}.mini-icon{font-size:25px}.unit-badge{background:#f0edff;color:#5b3bb7;font-weight:800;font-size:11px;padding:7px;border-radius:7px}.subject-picker{max-width:450px;margin:20px 0}.subject-picker label{font-weight:700;display:block;margin-bottom:7px}.form-context{background:#f0edff;color:#5b3bb7;border-radius:12px;padding:13px;margin-bottom:16px;font-weight:700}.current-image img{max-width:100%;max-height:350px;border-radius:12px;border:1px solid #ddd}.check{display:flex!important;align-items:center;gap:8px}.check input{width:auto}.error{background:#fee2e2;color:#991b1b;padding:12px;border-radius:10px;margin:12px 0}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#34206b,#ede9fe)}.login-card{width:min(420px,92%);background:#fff;padding:38px;border-radius:22px;box-shadow:0 25px 70px #24164c30}.login-logo{width:55px;height:55px;border-radius:16px;background:#5b3bb7;color:#fff;display:grid;place-items:center;font-size:28px}.login-card h1{color:#29205a}.login-card p{color:#64748b}.login-card form{display:flex;flex-direction:column;gap:8px}.login-card label{font-weight:700;margin-top:8px}.login-card input{padding:13px;border:1px solid #dbe0ea;border-radius:10px}.login-card button{margin-top:10px}.login-card>a{display:block;margin-top:20px}@media(max-width:1050px){.subject-grid,.unit-grid{grid-template-columns:repeat(2,1fr)}.layout{grid-template-columns:220px 1fr}.crud-grid{grid-template-columns:1fr}.admin-subject-grid{grid-template-columns:1fr}}@media(max-width:720px){.topbar{padding:0 15px}.brand{margin-right:15px}.topbar nav a{padding:10px 8px}.layout{display:block}.sidebar{display:none}.main,.admin-main,.form-main{padding:20px 15px}.hero{padding:28px 24px}.hero h1{font-size:29px}.hero-art{display:none}.subject-grid,.unit-grid,.stats{grid-template-columns:1fr}.dashboard-head{display:block}.admin-actions{margin-top:15px}.adminbar{padding:12px 15px}.adminbar nav a{font-size:12px}.search{flex-direction:column}}

.success{background:#dcfce7;color:#166534;padding:12px;border-radius:10px;margin:12px 0}.unit-gallery{margin-top:10px}.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.gallery-card{margin:0;background:#fff;border:1px solid #e7e9ef;border-radius:16px;overflow:hidden;box-shadow:0 5px 18px #26314d08}.gallery-card img{width:100%;height:220px;object-fit:cover;display:block}.gallery-card figcaption{padding:10px 13px;color:#64748b;font-size:13px}.unit-admin-card{border:1px solid #eceef3;border-radius:14px;padding:12px;margin:10px 0}.gallery-upload{background:#f8f8fc;border-radius:10px;padding:12px;margin-top:8px}.gallery-upload label{display:block;font-weight:700;color:#475569;margin-bottom:8px}.upload-line{display:flex;gap:8px;align-items:center}.upload-line input{flex:1}.upload-line button{background:#5b3bb7;color:#fff;border:0;border-radius:8px;padding:10px 13px;font-weight:700;cursor:pointer}.admin-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:12px}.admin-gallery-item{background:#fff;border:1px solid #e5e7eb;border-radius:10px;overflow:hidden;padding-bottom:9px}.admin-gallery-item img{width:100%;height:115px;object-fit:cover;display:block}.admin-gallery-item div{font-size:11px;color:#64748b;padding:7px;min-height:26px}.admin-gallery-item a{font-size:11px;padding:0 7px}.caption-box{display:grid;gap:5px}.caption-box label{font-size:12px}.caption-box input{margin-bottom:5px}.gallery-upload small{color:#64748b}@media(max-width:900px){.gallery-grid{grid-template-columns:repeat(2,1fr)}.admin-gallery{grid-template-columns:repeat(3,1fr)}}@media(max-width:600px){.gallery-grid,.admin-gallery{grid-template-columns:1fr 1fr}.upload-line{display:block}.upload-line input{margin-bottom:7px}}

/* PPT-style unit viewer */
.unit-presentation{margin:34px 0}.ppt-toolbar{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:14px}.ppt-toolbar h2{margin:3px 0 0;font-size:28px}.ppt-actions{display:flex;gap:8px}.ppt-btn{border:1px solid #dfe3ee;background:#fff;border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer}.ppt-btn.primary{background:#5b3bb7;color:#fff;border-color:#5b3bb7}.ppt-shell{position:relative;background:#111827;border-radius:22px;padding:10px;box-shadow:0 24px 70px rgba(24,31,56,.22);overflow:hidden}.ppt-progress{height:4px;background:#2d3548;border-radius:5px;overflow:hidden}.ppt-progress span{display:block;height:100%;width:0;background:#a78bfa;transition:width .3s}.ppt-slides{position:relative;min-height:520px}.ppt-slide{display:none;min-height:520px;padding:22px}.ppt-slide.active{display:block;animation:pptIn .35s ease}.slide-number{position:absolute;top:25px;right:28px;color:#aeb7cb;font-size:12px;font-weight:800;letter-spacing:2px}.slide-inner{height:100%;min-height:476px;border-radius:16px;padding:48px;position:relative;overflow:hidden;background:linear-gradient(135deg,#fff,#f4f1ff)}.cover-slide{display:flex;flex-direction:column;justify-content:center}.cover-slide:after{content:'';position:absolute;width:300px;height:300px;border-radius:50%;right:-90px;top:-90px;background:#ddd0ff;opacity:.7}.cover-kicker,.slide-heading span{font-size:12px;letter-spacing:2px;text-transform:uppercase;font-weight:800;color:#6d4ac0}.cover-slide h1{font-size:clamp(36px,5vw,64px);line-height:1.05;max-width:760px;margin:12px 0}.cover-slide p{font-size:18px;line-height:1.7;color:#5f6678;max-width:720px}.cover-line{width:90px;height:5px;border-radius:5px;background:#6d4ac0;margin:25px 0}.cover-slide span:last-child{color:#777f91;font-size:13px}.image-slide{background:#0f172a;color:#fff;display:flex;flex-direction:column}.image-slide .slide-heading h2{color:#fff}.image-slide img{display:block;width:100%;height:360px;object-fit:contain;margin:auto;border-radius:10px}.note-slide{display:grid;grid-template-columns:1fr 300px;grid-template-rows:auto 1fr;gap:18px 32px}.note-slide .slide-heading{grid-column:1/-1}.slide-heading h2{font-size:32px;margin:7px 0 0;color:#182033}.slide-summary{grid-column:1/-1;font-size:17px;color:#616b7e;margin:0}.slide-content{font-size:16px;line-height:1.8;color:#30384b;white-space:normal;overflow:auto;padding-right:10px}.slide-note-image{width:100%;max-height:310px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid #e5e7eb}.ppt-controls{display:flex;align-items:center;justify-content:center;gap:18px;padding:13px 4px 4px;color:#cbd5e1}.ppt-controls button{background:#252e42;border:1px solid #3b465d;color:#fff;padding:10px 16px;border-radius:9px;cursor:pointer;font-weight:700}.ppt-controls button:hover{background:#354057}.ppt-shell.fullscreen{position:fixed;inset:0;z-index:9999;border-radius:0;padding:18px;display:flex;flex-direction:column}.ppt-shell.fullscreen .ppt-slides{flex:1}.ppt-shell.fullscreen .ppt-slide{height:100%;min-height:0}.ppt-shell.fullscreen .slide-inner{min-height:calc(100vh - 145px)}@keyframes pptIn{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:none}}@media(max-width:800px){.ppt-toolbar{align-items:flex-start;flex-direction:column}.ppt-slides,.ppt-slide{min-height:500px}.slide-inner{padding:30px}.note-slide{display:flex;flex-direction:column}.slide-note-image{max-height:190px}.image-slide img{height:310px}.slide-heading h2{font-size:25px}}