:root{
  /* Hunter Green / Sand Dune scheme */
  --navy:#3E5F44;        /* primary green (was navy) */
  --green-deep:#2E4733;  /* darker green for hovers/gradients */
  --yellow:#DDD6B9;      /* sand dune accent (was yellow) */
  --ivory:#F7F5EC;       /* warm off-white background */
  --parchment:#ECE8D6;   /* secondary sand surface */
  --slate:#6B7466;       /* muted green-grey captions */
  --blue:#4A6B50;        /* secondary green for links/headings */
  --line:#D8D3BE;        /* sand border */
  --danger:#A1442C;      /* warm terracotta for destructive */
  --shadow:0 1px 3px rgba(46,71,51,.08),0 8px 24px rgba(46,71,51,.07);
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html,body{height:100%}
body{font-family:'Inter','system-ui',sans-serif;background:var(--ivory);color:var(--navy);-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:'Lora','Georgia',serif;font-weight:600;letter-spacing:-.01em}
button{font-family:inherit;cursor:pointer}
.muted{color:var(--slate)}

/* Book mark (Teaching Repertoire) */
.bookmark{width:60px;height:60px;border-radius:16px;background:var(--navy);display:grid;place-items:center;margin:0 auto;box-shadow:0 4px 14px rgba(46,71,51,.18)}
.bookmark.sm{width:38px;height:38px;border-radius:10px;margin:0;box-shadow:none}
.bookmark svg{width:60%;height:60%;display:block}
.bookmark svg *{stroke:var(--yellow);fill:none}
.bookmark svg .fillpart{fill:var(--yellow);stroke:none}

/* Login */
.login-screen{min-height:100vh;display:grid;place-items:center;background:
  radial-gradient(120% 100% at 50% 0%, #4d7355 0%, var(--navy) 60%, var(--green-deep) 100%);padding:24px}
.login-card{background:var(--ivory);border-radius:20px;padding:40px 36px;width:100%;max-width:380px;text-align:center;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.login-card h1{font-size:26px;margin:18px 0 4px}
.login-card .sub{color:var(--slate);font-size:13px;margin-bottom:24px}
.login-card label{display:block;text-align:left;font-size:12px;font-weight:600;color:var(--blue);margin-bottom:6px}
.login-card input{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;margin-bottom:14px;background:#fff}
.login-card input:focus{outline:none;border-color:var(--blue)}
.login-note{margin-top:18px;font-size:11px;color:var(--slate)}
.error{color:var(--danger);font-size:12.5px;margin-top:8px}

/* Buttons */
.btn-primary{width:100%;background:var(--navy);color:#fff;border:none;padding:12px;border-radius:10px;font-weight:600;font-size:15px;transition:background .15s}
.btn-primary:hover{background:var(--green-deep)}
.btn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--navy);padding:8px 14px;border-radius:9px;font-weight:500;font-size:13px}
.btn-ghost:hover{border-color:var(--blue)}
.btn-danger{background:var(--danger);color:#fff;border:none;padding:10px 18px;border-radius:9px;font-weight:600}
.btn-danger:hover{filter:brightness(.92)}
.link{background:none;border:none;color:var(--blue);font-weight:600;text-decoration:underline;padding:0;font-size:inherit}

/* Topbar */
.topbar{display:flex;align-items:center;gap:24px;padding:12px 24px;background:var(--navy);color:#fff;position:sticky;top:0;z-index:20;border-bottom:3px solid var(--yellow)}
.brand .bookmark.sm{background:rgba(255,255,255,.12)}
.brand .bookmark.sm svg *{stroke:var(--yellow)}
.brand .bookmark.sm svg .fillpart{fill:var(--yellow)}
.brand{display:flex;align-items:center;gap:12px}
.brand strong{display:block;font-family:'Lora',serif;font-size:15px}
.brand .muted{color:#c9d4c2;font-size:11.5px}
.tabs{display:flex;gap:4px;margin-left:auto}
.tab{background:transparent;border:none;color:#d4dccf;padding:8px 16px;border-radius:8px;font-weight:500;font-size:14px}
.tab:hover{background:rgba(255,255,255,.10);color:#fff}
.tab.active{background:var(--yellow);color:var(--green-deep);font-weight:600}
#logout{color:#fff;border-color:rgba(255,255,255,.25)}
#logout:hover{border-color:var(--yellow)}

/* Container */
.container{max-width:1120px;margin:0 auto;padding:32px 24px 64px}
.view-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;gap:16px;flex-wrap:wrap}
.view-head h2{font-size:24px}
.search{padding:9px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:14px;min-width:220px;background:#fff}
.search:focus{outline:none;border-color:var(--blue)}

/* Grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .12s,box-shadow .12s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(16,47,83,.12)}
.card-thumb{aspect-ratio:16/10;display:grid;place-items:center;position:relative;overflow:hidden}
.thumb-pdf{background:linear-gradient(135deg,#f4ecec,#e9d7d7)}
.thumb-pptx{background:linear-gradient(135deg,#f3ecdf,#ecdcc4)}
.thumb-glyph{font-family:'Lora',serif;font-weight:700;font-size:30px;color:rgba(16,47,83,.28);letter-spacing:.06em}
.card-badge{position:absolute;top:10px;left:10px;background:var(--navy);color:#fff;font-size:10px;font-weight:600;padding:3px 8px;border-radius:20px;letter-spacing:.04em}
.card-body{padding:14px 16px;flex:1;display:flex;flex-direction:column;gap:4px}
.card-title{font-family:'Lora',serif;font-weight:600;font-size:15.5px;line-height:1.25}
.card-topic{font-size:12px;color:var(--blue);font-weight:500}
.card-meta{font-size:11.5px;color:var(--slate)}
.card-actions{display:flex;gap:6px;padding:10px 14px;border-top:1px solid var(--line);background:#fcfbf6;align-items:stretch}
.card-actions .sm{font-size:12px;padding:7px 8px;border-radius:7px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;line-height:1}
.card-actions .btn-primary.sm{flex:2;width:auto;background:var(--navy);color:#fff;border:1px solid var(--navy)}
.card-actions .btn-primary.sm:hover{background:var(--green-deep)}
.card-actions .btn-ghost.sm{flex:1;border:1px solid var(--line);background:#fff;color:var(--navy)}
.card-actions .btn-ghost.sm:hover{border-color:var(--blue)}
.btn-danger-ghost{border:1px solid var(--line);background:#fff;color:var(--danger)}
.btn-danger-ghost.sm{flex:0 0 auto;width:34px;padding:7px;border-radius:7px;font-size:12px}
.btn-danger-ghost:hover{border-color:var(--danger);background:#fdf2f8}

/* skeleton */
.card.skeleton{pointer-events:none}
.sk-thumb{aspect-ratio:16/10;background:linear-gradient(90deg,#eee 25%,#f5f5f5 37%,#eee 63%);background-size:400% 100%;animation:shimmer 1.3s infinite}
.sk-line{height:12px;margin:14px 16px 0;border-radius:6px;background:linear-gradient(90deg,#eee 25%,#f5f5f5 37%,#eee 63%);background-size:400% 100%;animation:shimmer 1.3s infinite}
.sk-line.short{width:55%;margin-bottom:16px}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:0 0}}
.load-error{grid-column:1/-1;text-align:center;padding:60px 20px;color:var(--slate)}

.empty{text-align:center;padding:80px 20px;color:var(--slate)}

/* Upload */
#upload-view h2{font-size:24px;margin-bottom:8px}
.upload-intro{margin-bottom:20px;max-width:640px}
.dropzone{border:2px dashed var(--line);border-radius:var(--radius);background:#fff;padding:48px 24px;text-align:center;transition:border-color .15s,background .15s}
.dropzone.drag{border-color:var(--blue);background:#f3f7fb}
.dz-title{font-size:16px;font-weight:500}
.dz-sub{font-size:12.5px;color:var(--slate);margin-top:6px}
.upload-meta{display:flex;gap:16px;margin-top:18px;flex-wrap:wrap}
.upload-meta label{flex:1;min-width:220px;font-size:12px;font-weight:600;color:var(--blue)}
.upload-meta input{width:100%;margin-top:6px;padding:10px 12px;border:1.5px solid var(--line);border-radius:9px;font-size:14px;font-weight:400;color:var(--navy);background:#fff}
.upload-meta input:focus{outline:none;border-color:var(--blue)}
.upload-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.ul-row{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 14px;font-size:13px}
.ul-name{flex:0 0 40%;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ul-bar{flex:1;height:6px;background:var(--parchment);border-radius:4px;overflow:hidden}
.ul-fill{display:block;height:100%;background:var(--navy);width:0;transition:width .2s}
.ul-pct{flex:0 0 auto;font-size:12px;color:var(--slate);font-variant-numeric:tabular-nums;min-width:38px;text-align:right}
.ul-row.done .ul-fill{background:var(--navy)}
.ul-row.done .ul-pct{color:var(--navy);font-weight:600}
.ul-row.err{border-color:var(--danger)}
.ul-row.err .ul-pct,.ul-row.err .ul-msg{color:var(--danger);font-weight:600}
.ul-msg{flex:1;font-size:12.5px}
.dropbox-note{margin-top:32px;background:var(--parchment);border-radius:var(--radius);padding:18px 20px;font-size:13px}
.dropbox-note ul{margin:10px 0 0 18px;display:flex;flex-direction:column;gap:6px}
.dropbox-note code{background:#fff;padding:2px 6px;border-radius:5px;font-size:12px}

/* Presenter */
.presenter{position:fixed;inset:0;background:#0a0a0c;z-index:100;display:flex;flex-direction:column}
.present-stage{flex:1;display:grid;place-items:center;overflow:hidden;position:relative}
.present-stage canvas,.present-stage img{max-width:100%;max-height:100%;object-fit:contain;box-shadow:0 0 40px rgba(0,0,0,.5)}
.present-bar{display:flex;align-items:center;gap:10px;padding:10px 18px;background:rgba(46,71,51,.96);color:#fff}
.pbtn{background:rgba(255,255,255,.1);border:none;color:#fff;width:38px;height:38px;border-radius:9px;font-size:18px;display:grid;place-items:center}
.pbtn:hover{background:var(--yellow);color:var(--green-deep)}
.pcounter{font-size:13px;font-variant-numeric:tabular-nums;min-width:70px;text-align:center}
.pspacer{flex:1}
.ptitle{font-family:'Lora',serif;font-size:14px;max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.present-loading{color:#c9d4c2;font-size:15px}
.present-loading .link{color:var(--yellow)}
body.presenting{overflow:hidden}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(10,16,28,.55);z-index:200;display:grid;place-items:center;padding:20px}
.modal-card{background:#fff;border-radius:16px;padding:26px;max-width:380px;box-shadow:0 24px 60px rgba(0,0,0,.3)}
.modal-card h3{font-size:19px;margin-bottom:8px}
.modal-card p{font-size:13.5px;color:var(--slate);line-height:1.5}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:22px}

@media(max-width:600px){
  .topbar{flex-wrap:wrap;gap:12px}
  .tabs{margin-left:0;order:3;width:100%}
  .tab{flex:1}
  .ptitle{display:none}
}