.page{max-width:1200px;margin:0 auto;padding:20px}.header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px;display:flex}.header h1{margin:0}.back-link{color:var(--pen);margin-bottom:20px;text-decoration:none;display:inline-block}.back-link:hover{text-decoration:underline}.btn.btn-lg{border-radius:10px;padding:14px 32px;font-size:16px}.link-btn{color:var(--pen);cursor:pointer;font:inherit;background:0 0;border:0;margin-bottom:16px;padding:0;font-size:14px}.link-btn:hover{text-decoration:underline}.view-toggle,.nth-digit-mode-toggle{background:var(--sunken);border-radius:8px;gap:2px;padding:3px;display:flex}.nth-digit-mode-toggle{width:fit-content;margin:0 auto 24px}.view-toggle button,.nth-digit-mode-toggle button{font:inherit;cursor:pointer;color:var(--dim);background:0 0;border:0;border-radius:6px;padding:6px 14px;font-size:13px}.view-toggle button.active,.nth-digit-mode-toggle button.active{background:var(--sheet);color:var(--ink);box-shadow:var(--shadow)}.view-toggle button:focus-visible,.nth-digit-mode-toggle button:focus-visible{outline:3px solid var(--pen);outline-offset:2px}.image-list{flex-direction:column;gap:16px;display:flex}.image-card{background:var(--sheet);box-shadow:var(--shadow);border-radius:10px;align-items:center;gap:20px;padding:16px;display:flex}.image-card img{object-fit:cover;cursor:pointer;border-radius:10px;flex-shrink:0;width:150px;height:100px}.image-info{flex:1;min-width:0}.image-filename{color:var(--dim);text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.masonry-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.masonry-card{background:var(--sheet);box-shadow:var(--shadow);border-radius:10px;overflow:hidden}.masonry-card:hover{box-shadow:0 0 0 2px var(--pen)}.masonry-card img{aspect-ratio:4/3;object-fit:cover;cursor:pointer;border-radius:10px;width:100%;display:block}.masonry-card-info{padding:10px 12px}.masonry-card-rows{color:var(--dim);font-size:12px;font-weight:500;font-family:var(--font-digits)}@media (width<=700px){.masonry-grid{grid-template-columns:repeat(2,1fr)}.practice-menu{grid-template-columns:1fr}.nth-digit-position{font-size:36px}.nth-digit-input-area input{width:160px;font-size:18px}}@media (width<=400px){.masonry-grid{grid-template-columns:1fr}}.detail-modal{z-index:1000;background:color-mix(in srgb, var(--page) 85%, transparent);cursor:pointer;justify-content:center;align-items:center;padding:20px;display:none;position:fixed;inset:0;overflow-y:auto}.detail-modal.open{display:flex}.detail-modal-content{background:var(--sheet);cursor:default;width:100%;max-width:700px;max-height:90vh;box-shadow:var(--shadow), 0 8px 40px #00000040;border-radius:10px;overflow-y:auto}.detail-modal-content img{object-fit:cover;border-radius:10px;width:100%;max-height:400px;display:block}.detail-modal-body{padding:24px}.detail-modal-body h3{color:var(--ink);margin:0 0 16px;font-size:18px}.detail-modal-body .no-rows{color:var(--dim);font-size:14px}.detail-row{margin-bottom:18px}.detail-row:last-child{margin-bottom:0}.detail-row-header{color:var(--dim);margin-bottom:4px;font-size:13px;font-weight:700}.detail-row-link{color:var(--pen);text-decoration:none}.detail-row-link:hover{text-decoration:underline}.detail-table{border-collapse:collapse;table-layout:fixed;text-align:center;width:100%}.detail-table td{border:0;padding:6px 2px}.detail-table tr:first-child td{border-bottom:1px solid var(--rule)}.detail-pair-digits{font-family:var(--font-digits);color:var(--ink);font-size:20px;font-weight:700}.detail-pair-word{color:var(--pen);overflow-wrap:anywhere;font-size:14px;font-weight:700}.detail-close{color:var(--ink);cursor:pointer;opacity:.7;z-index:1001;background:0 0;border:0;font-size:36px;position:absolute;top:20px;right:24px}.detail-close:hover{opacity:1}.practice-container{max-width:700px;margin:0 auto;display:none}.practice-container.active{display:block}.practice-start-screen{text-align:center;padding:60px 20px}.practice-start-screen p{color:var(--dim);margin-bottom:24px;font-size:15px}.practice-field{margin-bottom:16px}.practice-field label{color:var(--ink);font-size:14px;font-weight:500}.practice-field select,.practice-field input{font:inherit;background:var(--sunken);color:var(--ink);border:0;border-radius:8px;max-width:100%;margin-left:8px;padding:8px 10px;font-size:16px}.practice-field input[type=number]{text-align:center;width:70px;font-family:var(--font-digits)}.practice-field select:focus,.practice-field input:focus{box-shadow:inset 0 0 0 2px var(--pen);outline:none}.practice-image-section{display:none}.practice-image-section.active{display:block}.practice-image-wrapper{border-radius:10px;margin-bottom:24px;overflow:hidden}.practice-image-wrapper img{object-fit:cover;border-radius:10px;width:100%;max-height:350px;display:block}.practice-progress{color:var(--dim);font-size:13px;font-family:var(--font-digits);justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.practice-progress-bar{background:var(--sunken);border-radius:3px;flex:1;height:6px;margin:0 12px;overflow:hidden}.practice-progress-fill{background:var(--pen);border-radius:3px;height:100%;transition:width .3s}.practice-row{background:var(--sheet);box-shadow:var(--shadow);border-radius:10px;margin-bottom:12px;padding:16px;transition:all .3s}.practice-row.correct{background:var(--ok-soft)}.practice-row.incorrect{background:var(--bad-soft)}.practice-row.locked{opacity:.5;pointer-events:none}.practice-row-header{color:var(--dim);justify-content:space-between;align-items:center;margin-bottom:10px;font-size:13px;font-weight:700;display:flex}.practice-row-link{color:var(--ink);border-bottom:1px dashed var(--dim);text-decoration:none}.practice-row-link:hover{color:var(--pen);border-bottom-color:var(--pen)}.practice-row-digits{font-family:var(--font-digits);color:var(--dim);letter-spacing:1px;font-size:13px}.practice-inputs{gap:8px;display:flex}.practice-slot{text-align:center;flex:1}.practice-slot input{width:100%;font:inherit;text-align:center;text-transform:uppercase;background:var(--sunken);color:var(--ink);border:0;border-radius:8px;padding:10px 4px;font-size:14px;font-weight:600}.practice-slot input:focus{box-shadow:inset 0 0 0 2px var(--pen);outline:none}.practice-slot input.correct{background:var(--ok-soft);color:var(--ok)}.practice-slot input.incorrect{background:var(--bad-soft);color:var(--bad)}.practice-slot .expected-word{color:var(--bad);margin-top:4px;font-size:11px;font-weight:600}.practice-row-actions{justify-content:flex-end;align-items:center;gap:8px;margin-top:10px;display:flex}.practice-row-result{font-size:13px;font-weight:600}.practice-row-result.correct{color:var(--ok)}.practice-row-result.incorrect{color:var(--bad)}.practice-complete{text-align:center;padding:40px 20px;display:none}.practice-complete.active{display:block}.practice-score{font-family:var(--font-digits);color:var(--ink);margin-bottom:8px;font-size:48px;font-weight:700}.practice-score-label{color:var(--dim);margin-bottom:24px;font-size:14px}.practice-complete-actions{margin-top:24px}.practice-complete-actions .btn-primary{margin-right:8px}.practice-perfect{text-align:center;color:var(--ok);padding:20px;font-weight:600}.practice-report{text-align:left;max-width:500px;margin:20px auto 0}.report-item{background:var(--sheet);box-shadow:var(--shadow);border-radius:10px;align-items:center;gap:12px;margin-bottom:6px;padding:10px 12px;display:flex}.report-item.perfect{background:var(--ok-soft)}.report-item.has-errors{background:var(--bad-soft)}.report-thumb{object-fit:cover;border-radius:10px;flex-shrink:0;width:48px;height:48px}.report-info{flex:1;min-width:0}.report-rows{color:var(--dim);font-size:12px}.report-badge{font-family:var(--font-digits);border-radius:6px;flex-shrink:0;padding:4px 10px;font-size:13px;font-weight:700}.report-badge.perfect{background:var(--ok-soft);color:var(--ok)}.report-badge.partial{background:var(--hi);color:var(--hi-ink)}.report-badge.fail{background:var(--bad-soft);color:var(--bad)}.report-item.expandable{cursor:pointer;user-select:none}.report-chevron{color:var(--dim);flex-shrink:0;font-size:10px;transition:transform .2s}.report-item.expanded .report-chevron{transform:rotate(90deg)}.report-detail{background:var(--sheet);border-radius:0 0 10px 10px;margin:-6px 0 6px;padding:8px 12px 8px 72px;display:none}.report-detail.open{display:block}.report-detail-row{border-bottom:1px solid var(--rule);padding:6px 0}.report-detail-row:last-child{border-bottom:0}.report-detail-row-link{color:var(--pen);font-size:13px;font-weight:600;text-decoration:none}.report-detail-row-link:hover{text-decoration:underline}.report-failed-words{flex-wrap:wrap;gap:8px;margin-top:4px;display:flex}.report-failed-word{align-items:center;gap:4px;font-size:12px;display:inline-flex}.report-digits{font-family:var(--font-digits);color:var(--dim);font-size:11px}.report-got{color:var(--bad);text-decoration:line-through}.report-expected{color:var(--ok);font-weight:600}.practice-menu{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;padding:20px 0;display:grid}.practice-menu-card{background:var(--sheet);box-shadow:var(--shadow);cursor:pointer;border-radius:10px;padding:24px}.practice-menu-card:hover{box-shadow:0 0 0 2px var(--pen)}.practice-menu-card h3{color:var(--ink);margin:0 0 8px;font-size:16px}.practice-menu-card p{color:var(--dim);margin:0;font-size:14px;line-height:1.4}#nth-digit-start-screen{text-align:center;padding:40px 20px}#nth-digit-start-screen>p{color:var(--dim);margin-bottom:24px;font-size:15px}.nth-digit-prompt{text-align:center;padding:40px 20px}.nth-digit-position{font-family:var(--font-digits);color:var(--ink);margin-bottom:8px;font-size:48px;font-weight:700}.nth-digit-question{color:var(--dim);margin-bottom:24px;font-size:16px}.nth-digit-input-area{justify-content:center;align-items:center;gap:12px;display:flex}.nth-digit-input-area input{width:200px;font:inherit;text-align:center;text-transform:uppercase;background:var(--sunken);color:var(--ink);border:0;border-radius:10px;padding:14px 16px;font-size:20px;font-weight:600}.nth-digit-input-area input:focus{box-shadow:inset 0 0 0 2px var(--pen);outline:none}.nth-digit-input-area input.correct{background:var(--ok-soft);color:var(--ok)}.nth-digit-input-area input.incorrect{background:var(--bad-soft);color:var(--bad)}#nth-digit-next-btn{margin-top:16px}.nth-digit-feedback{text-align:center;min-height:24px;margin-top:16px;font-size:15px;font-weight:600}.nth-digit-feedback.correct{color:var(--ok)}.nth-digit-feedback.incorrect{color:var(--bad)}.nth-digit-reveal{margin-top:20px;display:none}.nth-digit-reveal.active{display:block}.nth-digit-reveal-image{border-radius:10px;margin-bottom:16px;overflow:hidden}.nth-digit-reveal-image img{object-fit:cover;border-radius:10px;width:100%;max-height:250px;display:block}.nth-digit-reveal-row{background:var(--sheet);box-shadow:var(--shadow);border-radius:10px;padding:14px 16px}.nth-digit-reveal-row-header{color:var(--dim);margin-bottom:8px;font-size:13px;font-weight:700}.nth-digit-reveal-row-header a{color:var(--pen);text-decoration:none}.nth-digit-reveal-pairs{flex-wrap:wrap;gap:10px;display:flex}.nth-digit-reveal-pair{text-align:center;background:var(--sunken);border-radius:8px;min-width:70px;padding:8px 14px}.nth-digit-reveal-pair.highlighted{background:var(--pen-soft);box-shadow:inset 0 0 0 2px var(--pen)}.nth-digit-reveal-pair-digits{font-family:var(--font-digits);color:var(--ink);letter-spacing:2px;font-size:18px;font-weight:700}.nth-digit-reveal-pair-word{color:var(--pen);margin-top:2px;font-size:12px;font-weight:600}