:root{--paper: #faf6ef;--paper-raised: #ffffff;--ink: #3a2f28;--ink-soft: #6b5d51;--line: #e6ddcd;--brown: #5b4636;--brown-dark: #402f24;--accent: #c1653a;--accent-dark: #a34f2a;--accent-soft: #f3ddd0;--success: #4c7a52;--danger: #b34a4a;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 22px;--shadow-sm: 0 1px 2px rgba(58, 47, 40, .08);--shadow-md: 0 6px 20px rgba(58, 47, 40, .12);--font-serif: "Lora", Georgia, serif;--font-sans: "Nunito Sans", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html,body{height:100%;overflow-x:hidden}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}#app{min-height:100vh}button{font-family:inherit}.btn{border:none;border-radius:var(--radius-sm);padding:.65rem 1.1rem;font-size:.95rem;font-weight:600;cursor:pointer;transition:transform .08s ease,background .15s ease,opacity .15s ease}.btn:active{transform:scale(.98)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-dark)}.btn-block{width:100%}.btn-ghost{background:transparent;color:var(--ink-soft)}.btn-ghost:hover{color:var(--ink);background:var(--line)}.btn-danger{color:var(--danger)}.btn.is-loading{opacity:.7;pointer-events:none}.btn:disabled{opacity:.45;cursor:not-allowed}.login-screen,.config-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1.25rem}.login-card,.config-card{background:var(--paper-raised);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:2.5rem 2rem;max-width:420px;width:100%;text-align:center}.login-icon{margin-bottom:.5rem}.login-card h1,.config-card h1{font-family:var(--font-serif);font-size:2rem;margin:.25rem 0 .5rem;color:var(--brown-dark)}.login-tagline{color:var(--ink-soft);margin-bottom:1.25rem}.login-features{list-style:none;padding:0;margin:0 0 1.75rem;text-align:left;display:grid;gap:.5rem}.login-features li{padding-left:1.5rem;position:relative;color:var(--ink-soft);font-size:.92rem}.login-features li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.btn-google{background:var(--paper-raised);color:var(--ink);border:1px solid var(--line);display:inline-flex;align-items:center;gap:.6rem;width:100%;justify-content:center;box-shadow:var(--shadow-sm)}.btn-google:hover{background:var(--paper)}.login-hint{margin-top:1rem;font-size:.82rem;color:var(--ink-soft)}.btn-guest{margin-top:.75rem;width:100%}.boot-loading{min-height:100vh;display:flex;align-items:center;justify-content:center}.spinner{width:32px;height:32px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app-shell{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:center;gap:1.5rem;padding:.75rem 1.25rem;border-bottom:1px solid var(--line);background:var(--paper-raised);flex-shrink:0}.brand{display:flex;align-items:center;gap:.5rem;font-family:var(--font-serif);font-weight:600;font-size:1.15rem;color:var(--brown-dark)}.user-menu{display:flex;align-items:center;gap:.6rem;margin-left:auto}.avatar{width:32px;height:32px;border-radius:50%;object-fit:cover}.avatar-fallback{background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}.app-main{flex:1;overflow:hidden;position:relative}.view{position:absolute;top:0;right:0;bottom:0;left:0}.learn-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:flex;flex-direction:column;background:var(--paper);transform:translate(100%);transition:transform .2s ease}.learn-overlay.open{transform:translate(0)}.learn-overlay-header{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.25rem;border-bottom:1px solid var(--line);background:var(--paper-raised);flex-shrink:0}.learn-overlay-title{font-family:var(--font-serif);font-weight:600;font-size:1.05rem;color:var(--brown-dark)}.learn-overlay-body{flex:1;overflow:hidden}.notes-layout{position:relative;height:100%;overflow:hidden}.notes-browser{height:100%;display:flex;flex-direction:column;overflow:hidden;background:var(--paper-raised)}.sidebar-toolbar{padding:1rem;display:grid;gap:.7rem;border-bottom:1px solid var(--line)}#notes-search,.select-control{padding:.55rem .8rem;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--paper);color:var(--ink);font-size:.9rem}.toolbar-row{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}.toolbar-row .type-filters{flex:1}.type-filters{display:flex;gap:.4rem;flex-wrap:wrap}.chip{border:1px solid var(--line);background:transparent;color:var(--ink-soft);padding:.3rem .7rem;border-radius:999px;font-size:.8rem;cursor:pointer}.chip.is-active{background:var(--brown);border-color:var(--brown);color:var(--paper)}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));align-items:start;align-content:start;gap:1rem;margin:0;padding:1rem;overflow-y:auto;flex:1}.notes-list-empty{grid-column:1 / -1;color:var(--ink-soft);padding:1rem;font-size:.9rem;text-align:center}.note-card{width:100%;min-width:0;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-md);padding:.9rem;display:grid;gap:.4rem;align-content:start;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .08s ease,box-shadow .15s ease,border-color .15s ease}.note-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.note-card.is-active{border-color:var(--accent)}.note-card-header{display:flex;align-items:center;justify-content:space-between;gap:.4rem;min-width:0}.note-card-title{font-weight:700;font-size:.95rem;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.note-item-type{font-size:.68rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.03em;background:var(--accent-soft);color:var(--accent-dark);padding:.15rem .5rem;border-radius:999px;flex-shrink:0}.note-card-preview{font-size:.82rem;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:2.6em}.note-card-date{font-size:.72rem;color:var(--ink-soft)}.fab{position:fixed;right:calc(1.25rem + env(safe-area-inset-right,0px));bottom:calc(1.25rem + env(safe-area-inset-bottom,0px));width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;font-size:1.7rem;line-height:1;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;box-shadow:var(--shadow-md);z-index:10}.fab:hover{background:var(--accent-dark)}.notes-layout.show-editor .fab{display:none}.editor-pane{display:flex;flex-direction:column;overflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;background:var(--paper);transform:translate(100%);transition:transform .2s ease}.notes-layout.show-editor .editor-pane{transform:translate(0)}.notes-layout.show-editor .notes-browser{visibility:hidden}.editor-empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--ink-soft);font-family:var(--font-serif);font-size:1.1rem;text-align:center;padding:2rem}.editor-toolbar{display:flex;flex-direction:column;gap:.6rem;padding:.9rem 1.25rem;border-bottom:1px solid var(--line)}.editor-toolbar-top{display:flex;align-items:center;gap:.6rem}.editor-toolbar-actions{display:flex;align-items:center;justify-content:space-between;gap:.6rem;flex-wrap:wrap}.editor-toolbar-buttons{display:flex;gap:.25rem}.note-title-input{flex:1;min-width:150px;border:none;background:transparent;font-family:var(--font-serif);font-size:1.3rem;font-weight:600;color:var(--ink);padding:.2rem 0}.note-title-input:focus{outline:none}.note-title-input:read-only,.note-content-textarea:read-only{cursor:default}.type-toggle{display:flex;gap:.25rem}.type-toggle-btn{border:1px solid var(--line);background:transparent;border-radius:var(--radius-sm);padding:.45rem .6rem;font-size:1.05rem;line-height:1;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;color:var(--ink-soft)}.type-toggle-btn.is-active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-dark)}.form-hint{padding:.6rem 1.25rem;background:var(--accent-soft);color:var(--accent-dark);font-size:.85rem}.note-content-textarea{flex:1;border:none;resize:none;padding:1.5rem 1.75rem;font-family:var(--font-serif);font-size:1.1rem;line-height:1.8;color:var(--ink);background:transparent}.note-content-textarea:focus{outline:none}.syllable-hints{display:flex;flex-wrap:wrap;gap:.5rem;padding:0 1.75rem .75rem}.syllable-row{font-size:.78rem;padding:.2rem .55rem;border-radius:999px;background:var(--line);color:var(--ink-soft)}.syllable-row.ok{background:#dcecdd;color:var(--success)}.save-status{padding:.3rem 1.75rem .75rem;font-size:.75rem;color:var(--ink-soft);min-height:1.2em}.learn-layout{position:relative;height:100%;overflow:hidden}.learn-list{height:100%;background:var(--paper-raised);padding:1.25rem;overflow-y:auto}.learn-list h2{font-family:var(--font-serif);margin:0 0 .25rem;color:var(--brown-dark)}.learn-list-hint{color:var(--ink-soft);font-size:.85rem;margin:0 0 1rem}.learn-list ul{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}.form-item{width:100%;text-align:left;background:transparent;border:1px solid var(--line);border-radius:var(--radius-sm);padding:.6rem .75rem;cursor:pointer;display:grid;gap:.15rem}.form-item:hover{background:var(--paper)}.form-item.is-active{background:var(--accent-soft);border-color:var(--accent)}.form-item-name{font-weight:700;font-size:.92rem}.form-item-scheme{font-size:.75rem;color:var(--ink-soft)}.learn-detail{position:absolute;top:0;right:0;bottom:0;left:0;overflow-y:auto;padding:2rem;background:var(--paper);transform:translate(100%);transition:transform .2s ease}.learn-layout.show-detail .learn-detail{transform:translate(0)}.learn-layout.show-detail .learn-list{visibility:hidden}.learn-detail-inner{max-width:640px}.learn-back-btn{margin-bottom:.75rem}.learn-detail-inner h2{font-family:var(--font-serif);font-size:1.8rem;margin:0 0 .15rem;color:var(--brown-dark)}.form-origin{color:var(--ink-soft);font-size:.85rem;margin:0 0 1rem;font-style:italic}.form-summary{font-size:1.05rem;line-height:1.6}.form-scheme-box{background:var(--accent-soft);color:var(--accent-dark);padding:.75rem 1rem;border-radius:var(--radius-sm);margin:1rem 0 1.5rem;font-size:.9rem}.form-tips{padding-left:1.2rem;line-height:1.7;color:var(--ink)}.form-example{font-family:var(--font-serif);background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius-md);padding:1rem 1.25rem;white-space:pre-wrap;line-height:1.7;font-size:1rem}.practice-hint{font-size:.82rem;color:var(--ink-soft)}.practice-box{display:grid;gap:.6rem;margin-bottom:1.5rem}.practice-row{display:grid;grid-template-columns:130px 1fr 60px;align-items:center;gap:.6rem}.practice-line-label{font-size:.8rem;color:var(--ink-soft)}.practice-line-label em{display:block;font-style:normal;font-size:.72rem}.practice-input{padding:.45rem .6rem;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--paper-raised);color:var(--ink);font-family:var(--font-serif)}.practice-count{font-size:.8rem;text-align:right;color:var(--ink-soft)}.practice-count.ok{color:var(--success);font-weight:700}.icon-btn{font-size:1.1rem;line-height:1;padding:.5rem .6rem;display:inline-flex;align-items:center;justify-content:center}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#140f0a73;display:flex;align-items:center;justify-content:center;padding:1.25rem;z-index:100}.modal{background:var(--paper-raised);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);width:100%;max-width:560px;max-height:88vh;display:flex;flex-direction:column;overflow:hidden}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1.1rem 1.4rem;border-bottom:1px solid var(--line);flex-shrink:0}.modal-title{font-family:var(--font-serif);font-size:1.3rem;font-weight:600;color:var(--brown-dark)}.modal-close{background:transparent;border:none;color:var(--ink-soft);font-size:1.1rem;cursor:pointer;padding:.3rem}.modal-close:hover{color:var(--ink)}.modal-tabs{display:flex;gap:.25rem;padding:.75rem 1.4rem 0;flex-shrink:0;border-bottom:1px solid var(--line)}.modal-tab{background:transparent;border:none;padding:.55rem .9rem;color:var(--ink-soft);font-weight:600;cursor:pointer;border-bottom:2px solid transparent}.modal-tab.is-active{color:var(--accent-dark);border-bottom-color:var(--accent)}.modal-panel{padding:1.4rem;overflow-y:auto}.settings-section{margin-bottom:1.5rem}.settings-section:last-child{margin-bottom:0}.settings-section h3{margin:0 0 .6rem;font-size:.85rem;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-soft)}.segmented{display:flex;gap:.4rem;flex-wrap:wrap}.segmented-option{border:1px solid var(--line);background:transparent;color:var(--ink);padding:.5rem .9rem;border-radius:var(--radius-sm);font-weight:600;cursor:pointer}.segmented-option.is-active{background:var(--brown);border-color:var(--brown);color:var(--paper)}.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:.6rem}.palette-option{border:1px solid var(--line);background:transparent;border-radius:var(--radius-sm);padding:.6rem;display:grid;gap:.5rem;cursor:pointer;text-align:left}.palette-option.is-active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.palette-dots{display:flex;gap:.25rem}.palette-dot{width:18px;height:18px;border-radius:50%;border:1px solid rgba(0,0,0,.1)}.palette-option-label{font-size:.8rem;color:var(--ink)}.font-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:.5rem}.font-option{border:1px solid var(--line);background:transparent;color:var(--ink);padding:.6rem .7rem;border-radius:var(--radius-sm);font-size:1.05rem;cursor:pointer}.font-option.is-active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-dark)}.export-list-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem}.export-list-header h3{margin:0}.export-list{list-style:none;margin:0;padding:0;max-height:220px;overflow-y:auto;border:1px solid var(--line);border-radius:var(--radius-sm)}.export-item{display:flex;align-items:center;gap:.6rem;padding:.55rem .75rem;cursor:pointer;border-bottom:1px solid var(--line)}.export-item:last-child{border-bottom:none}.export-item:hover{background:var(--paper)}.export-item-title{flex:1;font-size:.88rem;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.export-actions{display:grid;gap:.6rem}#export-artist{width:100%;margin-bottom:.75rem}@media (max-width: 780px){.learn-detail{padding:1.25rem}.practice-row{grid-template-columns:1fr}.notes-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:.7rem;padding:.75rem}}@media (max-width: 640px){.toolbar-row{flex-direction:column;align-items:stretch}.toolbar-row .type-filters{flex:initial}.toolbar-row .select-control{width:100%}.app-header{flex-wrap:wrap;gap:.5rem .75rem;padding:.6rem .9rem}.brand span{display:none}.user-menu{flex-wrap:wrap;justify-content:flex-end;gap:.4rem}.user-menu .btn:not(.icon-btn){padding:.5rem .7rem;font-size:.85rem}}