:root{color-scheme:dark;--bg:#101116;--panel:#191b23;--panel2:#20222b;--text:#f3f3f8;--muted:#858793;--soft:#b1b3bf;--line:#2c2f38;--accent:#a0a6ff;--accent2:#858cff;--danger:#f08d96;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}html{min-height:100%;scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{opacity:.3;cursor:not-allowed}a:focus-visible,button:focus-visible,input:focus-visible,.dropzone:focus-within{outline:2px solid var(--accent);outline-offset:3px}::selection{background:#7b83eb66}.hidden{display:none!important}
.page-shell{width:min(1264px,calc(100% - 96px));margin:auto;min-height:100vh;display:flex;flex-direction:column}.topbar{height:95px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:820;letter-spacing:-.065em}.brand-symbol{display:grid;place-items:center;width:37px;height:37px;border-radius:10px;background:var(--accent2);color:#151622;font-size:26px;font-weight:900;letter-spacing:-.08em;padding-right:4px;padding-bottom:6px}.nav{display:flex;gap:35px;align-items:center}.nav-label,.eyebrow,.viewer-heading-label{font-size:10px;font-weight:770;letter-spacing:.2em;color:var(--muted)}.nav-link{font-size:13px;font-weight:650;display:flex;gap:12px;align-items:center}.nav-link:hover{color:var(--accent)}.nav-link span{color:var(--accent)}.hero{padding:102px 0 0}.eyebrow{display:flex;align-items:center;gap:10px;color:var(--accent);font-size:10px;letter-spacing:.17em}.live-dot{height:7px;width:7px;display:inline-block;border-radius:50%;background:var(--accent2);box-shadow:0 0 14px #9ba5ff80}.hero h1,.admin-title-row h1,.login-panel h1{font-size:clamp(54px,7.6vw,105px);font-weight:730;letter-spacing:-.09em;line-height:1.06;margin:27px 0 22px}.hero h1 span,.admin-title-row h1 span,.login-panel h1 span{color:var(--accent)}.hero-subtitle{font-size:15px;line-height:1.8;max-width:490px;color:var(--soft);margin:0}.hero-line{margin-top:108px;border-top:1px solid var(--line)}.library{padding:65px 0 140px;flex:1}.section-heading,.manage-heading{display:flex;align-items:end;justify-content:space-between;gap:30px}.eyebrow.subtle{color:var(--muted)}h2{letter-spacing:-.06em}.section-heading h2{font-size:32px;font-weight:640;margin:15px 0 0}.count{font-weight:400;font-size:17px;color:var(--accent);vertical-align:top;margin-left:6px}.search-box{height:44px;width:min(100%,295px);border:1px solid var(--line);border-radius:9px;display:flex;gap:12px;align-items:center;padding:0 13px;background:#181a21}.search-box>span{color:var(--muted);font-size:24px}.search-box input{border:0;outline:0;background:transparent;min-width:0;flex:1;color:var(--text);font-size:12px}.search-box input::placeholder{color:#777985}.search-box kbd{font-family:inherit;font-size:11px;color:var(--muted);border:1px solid #383a45;border-radius:4px;padding:1px 6px}.status-text{color:var(--muted);font-size:14px;margin-top:28px}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:37px}.presentation-card{min-width:0}.card-preview{position:relative;aspect-ratio:16/10;overflow:hidden;border:1px solid #30323d;background:#1a1c24;border-radius:13px;display:flex;align-items:center;justify-content:center}.card-preview img{height:100%;width:100%;object-fit:contain;transition:transform .35s ease}.presentation-card:hover .card-preview img{transform:scale(1.045)}.card-arrow{display:grid;place-items:center;position:absolute;right:13px;bottom:13px;background:#101218e5;border:1px solid #ffffff35;width:35px;height:35px;border-radius:50%;opacity:0;transform:translateY(5px);transition:all .2s}.presentation-card:hover .card-arrow,.presentation-card:focus-visible .card-arrow{opacity:1;transform:translateY(0)}.card-info{padding:18px 3px 3px;display:flex;justify-content:space-between;gap:16px}.card-title{font-size:15px;font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-meta{color:var(--muted);font-size:12px;margin-top:8px}.card-ext{border:1px solid var(--line);height:26px;padding:5px 8px;border-radius:5px;color:var(--soft);font-size:10px;font-weight:800;letter-spacing:.06em;flex-shrink:0}.empty-state{grid-column:1/-1;min-height:230px;border:1px dashed #393a49;border-radius:13px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:9px}.empty-state strong{font-size:19px}.empty-state span{color:var(--muted);font-size:13px}.site-footer{height:97px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;color:var(--muted);font-size:11px;letter-spacing:.01em}
/* Viewer: all slides are pre-rendered server-side, no PowerPoint required. */
.viewer-page{overflow:hidden}.viewer-shell{height:100vh;height:100dvh;min-height:420px;display:flex;flex-direction:column}.viewer-topbar{height:74px;min-height:74px;display:grid;grid-template-columns:1fr minmax(0,1.5fr) 1fr;align-items:center;padding:0 34px;border-bottom:1px solid var(--line);gap:12px}.back-link{color:var(--soft);font-size:12px;display:flex;align-items:center;gap:14px}.back-link>span:first-child{font-size:22px}.back-link:hover,.viewer-download:hover{color:var(--accent)}.viewer-heading{text-align:center;min-width:0}.viewer-heading-label{font-size:9px}.viewer-title{font-size:14px;font-weight:670;text-overflow:ellipsis;white-space:nowrap;overflow:hidden;margin-top:7px}.viewer-download{font-size:12px;justify-self:end;display:flex;gap:12px;align-items:center}.viewer-download span{color:var(--accent);font-size:18px}.view-main{flex:1;display:flex;min-height:0;padding:25px 28px;gap:18px;justify-content:space-between;align-items:center;background:#0c0d12}.slide-stage{height:100%;min-width:0;flex:1;display:flex;justify-content:center;align-items:center;overflow:hidden}.slide-image{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;user-select:none;box-shadow:0 15px 60px #0006}.slide-loading{font-size:13px;color:var(--muted)}.side-arrow{flex:0 0 40px;display:grid;place-items:center;width:40px;height:48px;color:var(--soft);background:transparent;border:1px solid transparent;border-radius:9px;font-size:34px}.side-arrow:not(:disabled):hover{background:#22242b;border-color:var(--line);color:var(--text)}.viewer-footer{height:182px;min-height:182px;border-top:1px solid var(--line);padding:12px 33px 16px;background:#14151b}.viewer-controls{height:37px;display:flex;align-items:center;gap:22px}.counter{font-weight:650;font-size:13px;min-width:78px}.tiny-controls{display:flex;gap:7px}.tiny-controls button,.fullscreen-btn{border:1px solid var(--line);color:var(--text);background:#1d1e25;border-radius:7px;height:30px;min-width:37px}.tiny-controls button:hover,.fullscreen-btn:hover{background:#2a2d3b}.viewer-hint{font-size:10px;color:var(--muted)}.fullscreen-btn{margin-left:auto;padding:0 13px;font-size:11px;display:flex;align-items:center;gap:10px}.thumb-strip{display:flex;gap:11px;margin-top:15px;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:#565767 transparent;scroll-padding:12px;height:95px}.thumb-item{border:2px solid transparent;border-radius:6px;flex:0 0 auto;width:124px;height:80px;background:#22242d;padding:0;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.thumb-item img{display:block;max-height:100%;max-width:100%;object-fit:contain}.thumb-item.active{border-color:var(--accent2)}.thumb-item span{position:absolute;bottom:2px;right:4px;background:#12131cbd;color:#fff;font-size:10px;border-radius:3px;padding:1px 4px}.viewer-shell:fullscreen{background:var(--bg)}.viewer-shell:fullscreen .view-main{background:#000}
/* Admin */
.admin-main{flex:1}.login-panel{width:min(570px,100%);margin:115px auto 150px}.login-panel h1{font-size:clamp(57px,8vw,89px)}.login-panel p,.admin-title-row p{color:var(--soft);font-size:14px;line-height:1.8;max-width:510px}.login-form{margin-top:48px}.login-form>label,.upload-fields label{font-size:12px;font-weight:660;display:block}.password-row{margin-top:12px;display:flex;gap:10px}.password-row input,.upload-fields input{width:100%;min-width:0;background:var(--panel);border:1px solid #343641;border-radius:8px;color:#fff;padding:14px 15px;outline:0;font-size:13px}.password-row input:focus,.upload-fields input:focus{border-color:var(--accent)}.btn-primary{border:0;background:var(--accent2);color:#141621;border-radius:8px;padding:0 24px;min-height:46px;white-space:nowrap;font-size:13px;font-weight:770;display:flex;align-items:center;justify-content:center;gap:19px}.btn-primary:hover{background:#afb3ff}.form-message{color:var(--danger);font-size:12px;margin-top:14px;min-height:16px}.dashboard{padding:70px 0 100px}.admin-title-row{display:flex;align-items:start;justify-content:space-between;gap:20px}.admin-title-row h1{font-size:clamp(44px,6vw,76px);margin:17px 0 14px}.btn-quiet{padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--soft);font-size:12px;white-space:nowrap}.btn-quiet:hover{background:#242630;color:#fff}.admin-stats{margin:45px 0 45px;border:1px solid var(--line);border-radius:12px;display:grid;grid-template-columns:repeat(3,1fr)}.admin-stats div{padding:23px 29px;display:flex;flex-direction:column;gap:12px}.admin-stats div+div{border-left:1px solid var(--line)}.admin-stats span{font-size:11px;color:var(--muted)}.admin-stats strong{font-size:29px;letter-spacing:-.05em;font-weight:650}.upload-card{border:1px solid #363846;border-radius:15px;padding:35px;background:#181920}.upload-card-title,.manage-heading{display:flex;align-items:center;justify-content:space-between}.upload-card-title h2,.manage-heading h2{font-size:25px;font-weight:650;margin:0}.upload-card-title span{font-size:10px;letter-spacing:.13em;color:var(--muted)}.dropzone{border:1px dashed #56596f;border-radius:12px;min-height:224px;margin-top:28px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;cursor:pointer;text-align:center;transition:background .2s,border-color .2s;padding:20px}.dropzone:hover,.dropzone.dragging{background:#202430;border-color:var(--accent)}.upload-icon{color:var(--accent);font-size:38px;height:50px}.dropzone strong{font-size:15px;font-weight:650}.dropzone>span:not(.upload-icon){font-size:12px;color:var(--soft)}.dropzone .pick{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.dropzone small{font-size:11px;color:var(--muted);margin-top:6px}.dropzone input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}.upload-fields{margin-top:19px;display:flex;align-items:end;gap:18px}.upload-fields label{flex:1;min-width:0}.upload-fields input{margin-top:10px}.upload-info{font-size:11px;color:var(--muted);line-height:1.7;margin:20px 0 0}.upload-feedback{margin-top:18px}.feedback-head{display:flex;justify-content:space-between;color:var(--soft);font-size:12px;margin-bottom:9px}.progress-track{height:5px;background:#383a45;border-radius:20px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);width:0;transition:width .25s}.manage-section{margin-top:66px}.manage-heading{margin-bottom:25px}.manage-heading .eyebrow{margin-bottom:12px}.manage-list{display:flex;flex-direction:column;gap:10px}.manage-item{border:1px solid var(--line);border-radius:11px;padding:14px;display:flex;align-items:center;gap:18px;background:#191a20;min-height:104px}.manage-cover{height:70px;aspect-ratio:16/10;background:#242630;overflow:hidden;display:flex;align-items:center;justify-content:center;border-radius:6px;flex-shrink:0}.manage-cover img{width:100%;height:100%;object-fit:contain}.manage-cover.no-cover{font-size:10px;font-weight:900;letter-spacing:.1em;color:var(--muted)}.manage-info{flex:1;min-width:0}.manage-name{font-size:14px;font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.manage-meta{margin-top:9px;display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-size:11px;color:var(--muted)}.status-pill{padding:4px 7px;border-radius:5px;background:#292a37;color:var(--accent);font-size:10px}.status-pill.error{background:#483039;color:#ffa7b0}.status-pill.processing{background:#2f3440;color:#cad2ff}.manage-actions{display:flex;gap:8px;align-items:center;flex-shrink:0}.manage-actions button,.manage-actions a{border:1px solid var(--line);border-radius:7px;background:#22232b;color:var(--soft);padding:9px 11px;font-size:11px}.manage-actions button:hover,.manage-actions a:hover{border-color:#717589;color:var(--text)}.manage-actions .delete:hover{color:var(--danger);border-color:var(--danger)}.toast{position:fixed;bottom:24px;right:24px;background:#2e3040;padding:15px 20px;border:1px solid #5b5d7c;box-shadow:0 12px 42px #0007;border-radius:9px;max-width:min(380px,calc(100vw - 30px));z-index:10;font-size:13px}dialog{width:min(430px,calc(100vw - 30px));background:#22242f;color:#fff;border:1px solid #404453;border-radius:14px;padding:26px;box-shadow:0 22px 85px #0009}dialog::backdrop{background:#000a}dialog h2{font-size:22px;margin:0 0 15px}dialog p{font-size:13px;line-height:1.6;color:var(--soft)}.dialog-buttons{margin-top:24px;display:flex;justify-content:flex-end;gap:10px}.btn-danger{border:0;background:#c95b69;color:white;padding:10px 18px;border-radius:8px;font-size:12px;font-weight:750}
@media(max-width:950px){.page-shell{width:calc(100% - 60px)}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding-top:85px}.hero-line{margin-top:80px}}
@media(max-width:640px){.page-shell{width:calc(100% - 36px)}.topbar{height:72px}.nav{gap:12px}.nav-label{display:none}.nav-link{font-size:12px}.brand{font-size:17px}.brand-symbol{width:33px;height:33px}.hero{padding:76px 0 0}.hero h1{font-size:clamp(47px,11vw,68px);margin:21px 0}.hero-subtitle{font-size:13px;line-height:1.7}.hero-line{margin-top:75px}.library{padding:42px 0 80px}.section-heading{align-items:stretch;flex-direction:column;gap:23px}.section-heading h2{font-size:28px}.search-box{width:100%}.card-grid{grid-template-columns:1fr;gap:28px;margin-top:26px}.card-arrow{opacity:1;transform:none}.site-footer{height:auto;min-height:85px;align-items:flex-start;justify-content:center;flex-direction:column;gap:8px;padding:18px 0}.viewer-topbar{height:66px;min-height:66px;grid-template-columns:60px minmax(0,1fr) 46px;padding:0 12px}.back-text,.viewer-heading-label,.viewer-download{font-size:0}.back-link{font-size:0;justify-content:center}.back-link>span:first-child{font-size:24px}.viewer-title{font-size:12px}.viewer-download span{font-size:20px}.view-main{padding:10px 5px;gap:0}.side-arrow{display:none}.viewer-footer{height:148px;min-height:148px;padding:8px 12px 11px}.viewer-controls{gap:10px}.viewer-hint{display:none}.fullscreen-btn span{display:none}.thumb-strip{gap:7px;height:78px;margin-top:12px}.thumb-item{width:96px;height:63px}.login-panel{margin:78px auto 100px}.login-panel h1{font-size:60px}.password-row{flex-direction:column}.password-row .btn-primary{width:100%}.dashboard{padding:48px 0 70px}.admin-title-row h1{font-size:50px}.admin-title-row p{font-size:12px}.admin-stats{margin:30px 0;grid-template-columns:repeat(3,minmax(0,1fr))}.admin-stats div{padding:17px 12px;gap:8px}.admin-stats span{font-size:10px}.admin-stats strong{font-size:23px}.upload-card{padding:21px 17px}.upload-card-title h2,.manage-heading h2{font-size:21px}.dropzone{min-height:205px}.dropzone strong{font-size:13px}.upload-fields{flex-direction:column;align-items:stretch}.upload-fields label{width:100%}.manage-section{margin-top:50px}.manage-item{align-items:flex-start;flex-wrap:wrap;gap:12px;padding:12px}.manage-cover{height:58px}.manage-info{min-width:calc(100% - 107px)}.manage-actions{width:100%;justify-content:flex-end}.manage-actions>*{flex:1;text-align:center}.toast{bottom:14px;right:14px}}
@media(max-height:570px) and (min-width:641px){.viewer-topbar{height:54px;min-height:54px}.view-main{padding:7px 12px}.viewer-footer{height:118px;min-height:118px}.thumb-strip{height:61px;margin-top:5px}.thumb-item{width:84px;height:53px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}

.viewer-shell.pseudo-fullscreen{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;z-index:100;background:#000}.viewer-shell.pseudo-fullscreen .viewer-topbar,.viewer-shell.pseudo-fullscreen .thumb-strip,.viewer-shell.pseudo-fullscreen .counter,.viewer-shell.pseudo-fullscreen .tiny-controls,.viewer-shell.pseudo-fullscreen .viewer-hint{display:none}.viewer-shell.pseudo-fullscreen .viewer-footer{height:47px;min-height:47px;padding:7px 12px;background:#111}.viewer-shell.pseudo-fullscreen .view-main{background:#000}

/* V3: touch-friendly slide presentation */
.slide-stage{position:relative;touch-action:pan-y;cursor:pointer}.slide-image{pointer-events:none}.slide-loading{position:absolute;bottom:10px;right:12px;background:#101116cc;border-radius:6px;padding:7px 11px;z-index:2}.slide-stage .slide-image.hidden + .slide-loading{position:static}.prepare-status{font-size:10px;color:var(--muted);white-space:nowrap}.viewer-controls #prepare{margin-left:0;min-width:120px}.viewer-footer .tiny-controls button{min-width:44px;min-height:36px}.thumb-item{min-height:44px}@media(max-width:640px){.viewer-controls #prepare{min-width:82px;font-size:10px;padding:0 5px}.prepare-status{font-size:9px;max-width:92px;overflow:hidden;text-overflow:ellipsis}.viewer-controls{gap:7px}.fullscreen-btn{margin-left:auto;padding:0 6px}}