:root{--navy:#102a43;--blue:#1976d2;--blue-light:#e8f1fb;--green:#278a62;--orange:#d98324;--red:#c94c4c;--text:#243b53;--muted:#8291a3;--line:#e4eaf0;--bg:#f7f9fc;--white:#fff;--shadow:0 8px 24px #102a4312}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.topbar{height:72px;background:var(--white);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 max(24px,calc((100% - 1180px)/2));gap:40px}.brand{font-weight:750;font-size:19px;display:flex;gap:10px;align-items:center;color:var(--navy);white-space:nowrap}.brand-mark{color:var(--blue);font-size:15px}.nav-tabs{display:flex;gap:28px;height:100%;flex:1}.nav-tab{border:0;background:none;padding:0 4px;color:var(--muted);font:inherit;cursor:pointer;border-bottom:2px solid transparent}.nav-tab.active{color:var(--blue);border-color:var(--blue);font-weight:650}.top-actions{display:flex;gap:8px}.icon-button,.close-button{border:0;background:transparent;color:var(--muted);font-size:22px;cursor:pointer;padding:6px 10px}.icon-button:hover,.close-button:hover{color:var(--navy)}main{max-width:1180px;margin:0 auto;padding:46px 24px 70px}.view{display:none}.view.active{display:block}.page-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:34px}.page-heading.compact{align-items:center;margin-bottom:28px}h1,h2,p{margin-top:0}h1{font-size:32px;line-height:1.15;margin-bottom:8px;letter-spacing:-.5px}h2{font-size:17px;margin-bottom:0}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--blue);font-weight:750;margin-bottom:9px}.muted{color:var(--muted)}.button{border:0;border-radius:7px;padding:11px 18px;font:inherit;font-weight:650;cursor:pointer;transition:.15s}.button.primary{background:var(--blue);color:white;box-shadow:0 3px 8px #1976d233}.button.primary:hover{background:#1565b6}.button.secondary{background:var(--blue-light);color:var(--blue)}.button.secondary:hover{background:#dceafa}.button span{margin-left:10px}.text-button{border:0;background:none;color:var(--blue);font:inherit;font-size:13px;cursor:pointer}.dashboard-grid{display:grid;grid-template-columns:330px 1fr;gap:20px;margin-bottom:20px}.panel{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:24px;box-shadow:var(--shadow)}.panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.date-label{font-size:12px;color:var(--muted)}.progress-panel{text-align:center}.progress-ring{height:148px;width:148px;border:12px solid var(--blue-light);border-top-color:var(--blue);border-right-color:var(--blue);border-radius:50%;margin:4px auto 18px;display:flex;flex-direction:column;justify-content:center;transform:rotate(25deg)}.progress-ring strong,.progress-ring small{transform:rotate(-25deg)}.progress-ring strong{font-size:28px}.progress-ring small{color:var(--muted);font-size:12px}.progress-meta{display:flex;justify-content:space-around;color:var(--muted);font-size:13px}.progress-meta b{color:var(--text)}.dot{height:7px;width:7px;border-radius:50%;display:inline-block;margin-right:6px}.dot.blue{background:var(--blue)}.dot.green{background:var(--green)}.category-list{display:grid;gap:13px}.category-row{display:flex;align-items:center;gap:10px}.category-row .category-name{flex:1}.category-row small{color:var(--muted)}.category-bar{height:6px;background:#eef2f6;border-radius:5px;overflow:hidden;width:100px}.category-bar i{display:block;height:100%;background:var(--blue);border-radius:5px}.recent-panel{min-height:190px}.recent-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.mini-card{border:1px solid var(--line);border-radius:8px;padding:16px;min-height:105px;min-width:0;overflow:hidden;cursor:pointer}.mini-card:hover{border-color:#9abfe6}.mini-card h3{font-size:14px;margin:0 0 11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tag{display:inline-block;max-width:100%;overflow-wrap:anywhere;color:var(--blue);background:var(--blue-light);border-radius:4px;padding:3px 7px;font-size:11px;margin:2px 3px 2px 0}.toolbar{display:flex;gap:12px;margin-bottom:20px}.search{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:white;border-radius:7px;padding:0 12px;flex:1;color:var(--muted)}.search input{border:0;outline:0;font:inherit;padding:11px 0;width:100%}.toolbar select{border:1px solid var(--line);border-radius:7px;padding:0 12px;background:white;color:var(--text);font:inherit}.cards-list{display:grid;gap:10px}.card-row{background:white;border:1px solid var(--line);border-radius:9px;padding:18px 20px;display:flex;align-items:center;gap:18px}.card-row-main{flex:1;min-width:0}.card-row h3{font-size:15px;margin:0 0 7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-row-actions{display:flex;gap:5px}.small-action{border:0;background:var(--bg);border-radius:5px;color:var(--muted);padding:7px 10px;cursor:pointer}.small-action:hover{color:var(--blue)}.empty{text-align:center;padding:45px 20px;color:var(--muted);background:white;border:1px dashed var(--line);border-radius:9px}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px}.stat{background:white;border:1px solid var(--line);border-radius:9px;padding:22px}.stat small{color:var(--muted)}.stat strong{display:block;font-size:28px;margin:5px 0}.activity-chart{display:flex;align-items:end;gap:14px;height:160px;padding-top:15px}.bar-col{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1;height:100%;justify-content:end}.bar{width:100%;max-width:42px;background:var(--blue-light);border-radius:5px 5px 0 0;min-height:3px}.bar.active{background:var(--blue)}.bar-col small{color:var(--muted);font-size:11px}.modal-backdrop{position:fixed;inset:0;background:#102a4366;display:flex;justify-content:center;align-items:center;padding:20px;z-index:5}.hidden{display:none!important}.modal{background:white;border-radius:11px;padding:26px;width:min(540px,100%);max-height:90vh;overflow:auto;box-shadow:0 20px 50px #102a4333}.small-modal{width:min(450px,100%)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.modal-header h2{font-size:21px}.modal label{display:block;font-weight:650;margin-bottom:16px}.modal textarea,.modal input{display:block;width:100%;border:1px solid var(--line);border-radius:6px;padding:10px;margin-top:7px;font:inherit;resize:vertical}.modal textarea:focus,.modal input:focus{outline:2px solid #1976d233;border-color:var(--blue)}.file-hint{display:block;color:var(--muted);font-size:12px;font-weight:400;margin-top:5px}.image-preview{max-height:150px;max-width:100%;border-radius:6px;margin:-5px 0 15px}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.manage-category-list{display:grid;gap:8px;margin-bottom:18px}.manage-category-list div{display:flex;justify-content:space-between;align-items:center;background:var(--bg);padding:8px 10px;border-radius:5px}.delete-category{border:0;color:var(--red);background:none;cursor:pointer}.study-modal{width:min(650px,100%)}.study-card{border:1px solid var(--line);border-radius:9px;padding:34px;text-align:center;min-height:330px;display:flex;flex-direction:column;align-items:center;justify-content:center}.study-label{font-size:10px;letter-spacing:1.5px;color:var(--muted);font-weight:750;margin-bottom:12px}.study-card h2{font-size:25px;max-width:500px;margin-bottom:20px}.study-image{max-height:145px;max-width:100%;object-fit:contain;margin-bottom:20px;border-radius:5px}.reveal-button{margin-top:auto}.study-answer{width:100%;border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.study-answer p{font-size:17px;white-space:pre-wrap}.rating-actions{display:flex;justify-content:center;gap:8px;margin-top:20px}.rating{border:0;border-radius:6px;padding:9px 15px;color:white;cursor:pointer;font:inherit;font-size:13px}.rating.again{background:var(--red)}.rating.hard{background:var(--orange)}.rating.easy{background:var(--green)}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--navy);color:white;padding:11px 17px;border-radius:6px;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.category-choice,.study-category-choice{display:flex!important;align-items:center;gap:10px;background:var(--bg);border-radius:6px;padding:10px;margin-bottom:8px!important;font-weight:500!important}.category-choice input,.study-category-choice input{width:auto!important;margin:0!important}.study-category-list{max-height:240px;overflow:auto;margin:10px 0}
.study-count-options{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.study-count-input{width:100%;border:1px solid var(--line);border-radius:6px;padding:10px;font:inherit;margin:2px 0 8px 0}.study-count-input:disabled{background:var(--bg);color:var(--muted)}
.study-type-options{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.study-option-label{font-weight:650;margin-bottom:8px}
@media(max-width:700px){.topbar{height:62px;padding:0 16px;gap:14px}.brand{font-size:16px}.nav-tabs{gap:10px}.nav-tab{font-size:13px}.top-actions{display:none}main{padding:30px 16px 50px}.page-heading{display:block;margin-bottom:25px}.page-heading .button{margin-top:16px;width:100%}h1{font-size:27px}.dashboard-grid{grid-template-columns:1fr}.recent-cards{grid-template-columns:1fr}.toolbar{flex-wrap:wrap}.search{flex-basis:100%;order:0}.toolbar select,.toolbar .button{flex:1;padding-left:8px;padding-right:8px}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat{padding:16px}.stat strong{font-size:24px}.card-row{padding:15px 13px;align-items:flex-start}.card-row-actions{flex-direction:column}.study-card{padding:25px 18px}.rating-actions{flex-wrap:wrap}.rating{flex:1}.panel{padding:18px}}