/* edu.css · Assam Converter education tools · public_html/edu/edu.css */
:root{--bg:#f5f1e8;--card:#fffdf8;--el:#f1ebdd;--el-2:#ebe3d2;--accent:#d94f1e;--accent-d:#b8401a;--accent-soft:rgba(217,79,30,.10);--accent-glow:rgba(217,79,30,.3);--success:#0e7c6f;--success-soft:rgba(14,124,111,.1);--red:#c44231;--ink:#171511;--ink-2:#403a32;--mut:#6f675b;--line:#e4ddcc;--line-2:#d6ccb6;--r-sm:10px;--r-md:14px;--r-lg:18px;--r-xl:26px;--sh:0 8px 24px -8px rgba(23,21,17,.14),0 2px 8px rgba(23,21,17,.05);--serif:'Fraunces',Georgia,serif;--sans:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',ui-monospace,monospace}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--sans);color:var(--ink);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;background:radial-gradient(ellipse 80% 50% at 20% 0%,rgba(217,79,30,.06),transparent 50%),radial-gradient(ellipse 60% 40% at 80% 100%,rgba(14,124,111,.05),transparent 50%),var(--bg);background-attachment:fixed}
a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-d)}
button,input,select{font-family:inherit}
.container{max-width:1100px;margin:0 auto;padding:2rem 1.5rem 3rem}
.back-link{display:inline-flex;align-items:center;gap:10px;color:var(--ink-2);font-size:.9rem;font-weight:500;padding:.6rem 1.2rem;background:var(--card);border:1px solid var(--line);border-radius:100px;transition:.25s}
.back-link:hover{color:var(--accent);border-color:rgba(217,79,30,.45);transform:translateX(-4px)}
.hero{margin:2.4rem 0 1.4rem}
.kicker{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.66rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin-bottom:.55rem}
.kicker::before{content:"";width:22px;height:1px;background:var(--accent)}
.hero h1{font-family:var(--serif);font-size:clamp(2.2rem,5vw,2.75rem);font-weight:500;letter-spacing:-.03em;line-height:1.05}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero p{color:var(--mut);font-size:.98rem;max-width:56ch;margin-top:.45rem;line-height:1.5;text-wrap:pretty}
.main-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:1.5rem;align-items:start}
@media(max-width:900px){.main-grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh)}
.card-header{padding:1.35rem 1.5rem;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.card-title{font-family:var(--serif);font-size:1.08rem;font-weight:600;display:flex;align-items:center;gap:11px;letter-spacing:-.01em}
.card-title i{font-size:.9rem;color:var(--ink-2)}
.card-meta{font-size:.8rem;color:var(--mut);display:flex;align-items:center;gap:8px}
.card-body{padding:1.5rem}
.upload-zone{border:2px dashed #d3cbb8;border-radius:var(--r-lg);padding:3rem 2rem;text-align:center;cursor:pointer;transition:.3s;background:var(--el);position:relative;overflow:hidden}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent)!important;background:#fff}
.upload-icon{width:72px;height:72px;margin:0 auto 1.4rem;background:var(--accent-soft);border-radius:50%;display:grid;place-items:center;font-size:1.6rem;color:var(--accent)}
.upload-zone h3{font-size:1.15rem;font-weight:600;margin-bottom:.35rem}
.upload-zone p{color:var(--mut);font-size:.9rem;margin-bottom:1.4rem}
.upload-btn{background:linear-gradient(135deg,var(--accent),#c4441a);color:#fff;border:0;padding:.85rem 1.9rem;border-radius:100px;font-size:.98rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:10px;transition:.25s;box-shadow:0 10px 30px -10px var(--accent-glow)}
.upload-btn:hover{transform:translateY(-2px);box-shadow:0 15px 40px -10px var(--accent-glow)}
.format-tags{display:flex;gap:6px;justify-content:center;margin-top:1.1rem}
.format-tag{font-family:var(--mono);font-size:.64rem;font-weight:700;letter-spacing:.1em;color:var(--mut);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:3px 8px}
#fileInput{display:none}
.pv-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:1rem;flex-wrap:wrap}
.pv-bar b{font-size:.88rem;font-weight:600}
.pv-bar span{font-size:.8rem;color:var(--mut)}
.preview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px}
.preview-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:8px 8px 6px;cursor:grab;transition:border-color .2s,transform .2s,box-shadow .2s}
.preview-card:hover{border-color:rgba(217,79,30,.45);box-shadow:0 10px 22px -16px rgba(23,21,17,.4)}
.preview-card.dragging{opacity:.45}
.preview-card.drop-target{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.preview-img{display:block;width:100%;aspect-ratio:3/4;object-fit:contain;background:var(--el);border-radius:8px}
.preview-order{position:absolute;top:12px;left:12px;z-index:2;min-width:22px;height:22px;padding:0 6px;border-radius:7px;background:var(--ink);color:#fff;font:700 .7rem/22px var(--mono);text-align:center}
.preview-remove{position:absolute;top:12px;right:12px;z-index:3;width:24px;height:24px;border-radius:50%;border:0;background:rgba(23,21,17,.72);color:#fff;font-size:.65rem;cursor:pointer;display:grid;place-items:center;transition:.15s}
.preview-remove:hover{background:var(--red)}
.preview-name{font-size:.72rem;color:var(--mut);margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:center}
.settings-section{display:flex;flex-direction:column;gap:1.1rem}
.label{font-size:.86rem;font-weight:500;color:var(--ink-2);margin-bottom:.55rem;display:block}
.side-empty{background:var(--el);border:1px solid var(--line);border-radius:var(--r-md);padding:1.2rem 1rem;text-align:center;font-size:.84rem;color:var(--mut);line-height:1.5}
.side-empty .se-ic{width:42px;height:42px;margin:0 auto .65rem;border-radius:12px;background:var(--card);border:1px solid var(--line);display:grid;place-items:center;color:var(--accent)}
.side-empty strong{display:block;color:var(--ink);font-weight:600;margin-bottom:2px}
.files-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:.55rem}
.files-title{font-size:.86rem;font-weight:500;color:var(--ink-2);display:flex;align-items:center;gap:7px}
.sort-select,.option-select,.option-input{width:100%;background:var(--el);border:1px solid var(--line);border-radius:var(--r-sm);padding:.6rem .75rem;font-size:.86rem;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s;appearance:none;-webkit-appearance:none}
.sort-select,.option-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236f675b' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center;padding-right:2rem;cursor:pointer}
.sort-select{width:auto;padding:.38rem 1.8rem .38rem .6rem;font-size:.78rem}
.sort-select:focus,.option-select:focus,.option-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);background-color:#fff}
.files-grid{display:flex;flex-direction:column;gap:6px;max-height:210px;overflow-y:auto;padding-right:2px}
.file-item{display:flex;align-items:center;gap:10px;padding:.55rem .6rem;background:var(--el);border:1px solid var(--line);border-radius:var(--r-sm);cursor:grab}
.file-item.dragging{opacity:.45}
.file-icon{width:30px;height:30px;border-radius:8px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:.8rem;flex-shrink:0}
.file-info{flex:1;min-width:0}
.file-name{font-size:.8rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-meta{font-size:.7rem;color:var(--mut)}
.remove-file{width:24px;height:24px;border:0;border-radius:7px;background:transparent;color:var(--mut);cursor:pointer;flex-shrink:0}
.remove-file:hover{background:rgba(196,66,49,.1);color:var(--red)}
.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.option-item.full{grid-column:1/-1}
.option-label{display:flex;align-items:center;gap:6px;font-size:.78rem;font-weight:500;color:var(--ink-2);margin-bottom:.4rem}
.option-label i{font-size:.72rem;color:var(--mut)}
.options-row{display:flex;align-items:center;justify-content:space-between;background:var(--el);border:1px solid var(--line);border-radius:var(--r-md);padding:.85rem 1rem}
.toggle-label{font-size:.88rem;color:var(--ink-2)}
.toggle-switch{position:relative;width:44px;height:24px;flex-shrink:0;cursor:pointer}
.toggle-switch input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;inset:0;background:#cdd5df;border-radius:24px;transition:.25s}
.toggle-slider::before{content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.25s;box-shadow:0 1px 3px rgba(0,0,0,.15)}
.toggle-switch input:checked+.toggle-slider{background:var(--accent)}
.toggle-switch input:checked+.toggle-slider::before{transform:translateX(20px)}
.card-foot{padding:1.3rem 1.5rem 1.5rem;border-top:1px solid var(--line)}
.action-btns{display:flex;flex-direction:column;gap:.7rem}
.btn-primary{width:100%;display:inline-flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(135deg,var(--accent),#c4441a);color:#fff;border:0;border-radius:var(--r-md);padding:.95rem 1.2rem;font-size:.98rem;font-weight:600;cursor:pointer;transition:.25s;box-shadow:0 10px 26px -12px var(--accent-glow)}
.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 15px 34px -12px var(--accent-glow)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}
.btn-row{display:grid;grid-template-columns:1fr 1fr;gap:.6rem}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--el);border:1px solid var(--line);color:var(--ink-2);border-radius:var(--r-md);padding:.72rem .9rem;font-size:.86rem;font-weight:500;cursor:pointer;transition:.2s}
.btn-secondary:hover{border-color:rgba(217,79,30,.45);color:var(--accent);background:#fff}
.btn-secondary .cnt{font:700 .66rem/1 var(--mono);background:var(--card);border:1px solid var(--line);border-radius:20px;padding:3px 6px;color:var(--mut)}
.progress-box{display:none;background:var(--el);border:1px solid var(--line);border-radius:var(--r-md);padding:1rem;font-size:.86rem;color:var(--ink-2)}
.progress-bar{height:8px;background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--accent),#ef7a4e);border-radius:8px;transition:width .3s}
.result-box{display:none;text-align:center;background:var(--success-soft);border:1px solid rgba(14,124,111,.25);border-radius:var(--r-md);padding:1.3rem 1rem}
#resultBox>i{color:var(--success)!important;font-size:2.4rem!important}
#resultBox h3{font-family:var(--serif);font-weight:600;font-size:1.15rem}
#indvBox>div:first-child{color:var(--mut)!important}
#indvList button{background:var(--card)!important;border:1px solid var(--line)!important;color:var(--ink)!important}
#indvList button:hover{border-color:rgba(217,79,30,.45)!important}
#indvList .fa-file-pdf{color:var(--accent)!important}
.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem;margin-top:2rem}
.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.2rem 1rem;text-align:center;box-shadow:var(--sh)}
.feature i{font-size:.95rem;color:var(--ink);margin-bottom:.45rem;display:block}
.feature h4{font-family:var(--serif);font-size:1rem;font-weight:600;margin-bottom:.2rem}
.feature p{font-size:.82rem;color:var(--mut)}
@media(max-width:700px){.features{grid-template-columns:1fr}}
.footer{text-align:center;margin-top:2.2rem;font-size:.86rem}
@media(max-width:560px){.container{padding:1.2rem 1rem 2.5rem}.hero{margin-top:1.6rem}.card-header,.card-body,.card-foot{padding-left:1.1rem;padding-right:1.1rem}.upload-zone{padding:2.2rem 1.2rem}.preview-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* ── education tools ── */
[hidden]{display:none!important}
.chips{display:flex;gap:8px;overflow-x:auto;margin:0 0 1.5rem;padding:2px 2px 6px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{display:inline-flex;align-items:center;gap:7px;flex-shrink:0;padding:.5rem .95rem;border:1px solid var(--line);border-radius:100px;background:var(--card);color:var(--ink-2);font-size:.84rem;font-weight:600;text-decoration:none;transition:.2s}
.chip i{color:var(--accent);font-size:.8rem}
.chip:hover{border-color:var(--accent);color:var(--ink)}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}
.chip.on i{color:#ffb89c}
.big-in{font-size:1.5rem!important;font-weight:700;padding:.75rem .9rem!important}
.hint{font-size:.76rem;color:var(--mut);margin:.35rem 0 0}
.rhead,.row{display:grid;gap:8px;align-items:center}
.rhead{font:700 .64rem/1.2 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--mut);padding:0 2px 7px}
.rhead em{font-style:normal;text-transform:none;letter-spacing:0;opacity:.75}
.rows{display:flex;flex-direction:column;gap:8px}
.t-sem .rhead,.t-sem .row{grid-template-columns:4.2rem minmax(0,1fr) minmax(0,1fr) 34px}
.t-grade .rhead,.t-grade .row{grid-template-columns:minmax(0,1.4fr) minmax(0,.7fr) minmax(0,1fr) 34px}
.t-marks .rhead,.t-marks .row{grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,.8fr) 34px}
.row .option-input,.row .option-select{width:100%;min-width:0}
.rlab{font-size:.84rem;font-weight:600;color:var(--ink-2)}
.rx{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:var(--card);color:var(--mut);cursor:pointer;display:grid;place-items:center;font-size:.8rem;transition:.2s}
.rx:hover{border-color:#b3321f;color:#b3321f}
.radd{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.radd button{display:inline-flex;align-items:center;gap:7px;background:transparent;border:1.5px dashed var(--line);border-radius:var(--r-sm);padding:.55rem .9rem;font-size:.82rem;font-weight:600;color:var(--ink-2);cursor:pointer;transition:.2s}
.radd button:hover{border-color:var(--accent);color:var(--accent)}
.radd button.q{border-style:solid}
.res{text-align:center;padding:1.5rem 1rem 1.3rem;background:var(--el);border:1px solid var(--line);border-radius:var(--r-md)}
.res>small{display:block;font:700 .66rem/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--mut)}
.res b{display:block;font-family:'Fraunces',Georgia,serif;font-size:3.2rem;font-weight:600;line-height:1.05;letter-spacing:-.03em;color:var(--accent);margin:.5rem 0 .35rem;font-variant-numeric:tabular-nums}
.res b small{font-size:.42em;color:var(--ink-2);margin-left:.1em;font-weight:500;letter-spacing:0}
.res b.dim{color:var(--mut);opacity:.35}
.res p{font-size:.86rem;color:var(--ink-2);margin:0}
.msg{margin:.9rem 0 0;padding:.7rem .9rem;border-radius:var(--r-sm);font-size:.86rem;font-weight:500;line-height:1.45}
.msg.ok{background:#e4f1e9;color:#25603f}
.msg.warn{background:#fbf0dc;color:#7a5410}
.msg.bad{background:#fbe9e6;color:#9a2c1c}
.kv{display:grid;grid-template-columns:1fr auto;gap:.5rem 1rem;font-size:.88rem;margin:1rem 0 0}
.kv:empty{display:none}
.kv dt{color:var(--mut)}
.kv dd{margin:0;font-family:var(--mono);font-weight:700;text-align:right}
.formula{margin:1rem 0 0;font-family:var(--mono);font-size:.8rem;line-height:1.6;background:var(--el);border:1px dashed var(--line);border-radius:var(--r-sm);padding:.65rem .8rem;color:var(--ink-2);white-space:pre-line;word-break:break-word}
.tbl:empty{display:none}
.tbl{margin-top:1rem;border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden;max-height:300px;overflow-y:auto}
.tbl table{width:100%;border-collapse:collapse;font-size:.82rem}
.tbl th{position:sticky;top:0;background:var(--el);text-align:left;font:700 .64rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--mut);padding:.6rem .75rem}
.tbl td{padding:.42rem .75rem;border-top:1px solid var(--line);font-family:var(--mono)}
.tbl tr.hi td{background:var(--accent-soft);color:var(--accent);font-weight:700}
.info{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:1.25rem;margin-top:2rem}
.info .card-body{line-height:1.65;font-size:.92rem;color:var(--ink-2)}
.info p{margin:0 0 .8rem}
.info p:last-child{margin-bottom:0}
.info h2{font-family:'Fraunces',Georgia,serif;font-size:1.25rem;font-weight:600;color:var(--ink);margin:0 0 .8rem}
.info details{border-top:1px solid var(--line);padding:.75rem 0}
.info details:first-of-type{border-top:0;padding-top:0}
.info summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:10px}
.info summary::-webkit-details-marker{display:none}
.info summary::after{content:"+";color:var(--accent);font-weight:700}
.info details[open] summary::after{content:"−"}
.info details p{margin:.5rem 0 0}
@media(max-width:860px){.info{grid-template-columns:1fr}}
@media(max-width:520px){.t-grade .rhead,.t-grade .row{grid-template-columns:minmax(0,1fr) 3.8rem minmax(0,1fr) 34px}.t-marks .rhead,.t-marks .row{grid-template-columns:minmax(0,1fr) 4.2rem 4.2rem 34px}.t-sem .rhead,.t-sem .row{grid-template-columns:3.6rem minmax(0,1fr) minmax(0,1fr) 34px}.res b{font-size:2.6rem}}