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p{color:var(--text-secondary);margin:.55rem 0 0;font-size:.8rem;line-height:1.5}.workbook-loading-rule{background:color-mix(in srgb,var(--border) 75%,transparent);width:min(300px,70vw);height:3px;margin-top:.45rem;position:relative;overflow:hidden}.workbook-loading-rule i{background:var(--primary);width:38%;height:100%;animation:1.6s ease-in-out infinite workbook-rule-progress;position:absolute}@keyframes workbook-rule-progress{0%{left:-40%}to{left:105%}}@keyframes piaf-note-breathe{0%,to{transform:translateY(0)rotate(-1deg)}50%{transform:translateY(-4px)rotate(1deg)}}@media (prefers-reduced-motion:reduce){.workbook-loading-mascot,.workbook-loading-rule i{animation:none}.workbook-loading-rule i{left:31%}}@media (width<=480px){.workbook-loading-screen{padding:1.25rem}.workbook-loading-screen:after{left:1.25rem}.workbook-loading-note{padding:1.15rem 1.2rem}.workbook-loading-note strong{font-size:1.25rem}}.tour-root-overlay{z-index:99999;pointer-events:auto;position:fixed;inset:0}.tour-backdrop{background:#2a1f19b8;position:absolute;inset:0}.tour-spotlight-mask{z-index:100000;pointer-events:none;border:2px solid var(--secondary);border-radius:0;transition:all .22s;position:fixed;box-shadow:0 0 0 9999px #2a1f19c2}.tour-spotlight-pulse{z-index:100000;pointer-events:none;border:1px solid var(--primary);animation:1.7s ease-in-out infinite tour-mark;position:fixed}@keyframes tour-mark{0%,to{outline:0 solid #0000}50%{outline:7px solid color-mix(in srgb,var(--secondary) 18%,transparent)}}.tour-tooltip-card{z-index:100001;border:1px solid var(--text-primary);border-top:5px solid var(--primary);background:var(--modal-bg);width:min(90vw,360px);box-shadow:9px 9px 0 color-mix(in srgb,var(--secondary) 34%,transparent);color:var(--text-primary);pointer-events:auto;border-radius:0;position:fixed;overflow:visible}.tour-card-inner{flex-direction:column;gap:1rem;padding:1.3rem;display:flex}.tour-arrow-left{background:var(--modal-bg);border-left:1px solid var(--text-primary);border-bottom:1px solid var(--text-primary);width:15px;height:15px;position:absolute;left:-8px;transform:translateY(-50%)rotate(45deg)}.tour-header,.tour-footer{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding-bottom:.75rem;display:flex}.tour-footer{border-top:1px solid var(--border);border-bottom:0;padding:1rem 0 0}.tour-badge{border:1px solid color-mix(in srgb,var(--primary) 50%,var(--border));color:var(--primary);letter-spacing:.08em;background:0 0;border-radius:0;align-items:center;gap:.35rem;padding:.28rem .45rem;font:800 .65rem/1 Inter Tight,Inter,sans-serif;display:inline-flex}.tour-close-btn,.tour-btn-skip{color:var(--text-secondary);cursor:pointer;background:0 0;border:0}.tour-close-btn{border-bottom:1px solid #0000;place-items:center;padding:.25rem;display:grid}.tour-close-btn:hover,.tour-btn-skip:hover{color:var(--primary);border-color:var(--primary)}.tour-body{grid-template-columns:42px 1fr;align-items:start;gap:1rem;min-height:115px;display:grid}.tour-icon-wrap{border:1px solid var(--primary);background:color-mix(in srgb,var(--primary) 5%,var(--modal-bg));width:40px;height:40px;color:var(--primary);border-radius:0;place-items:center;display:grid;transform:rotate(-2deg)}.tour-step-icon{letter-spacing:.08em;font:800 .7rem/1 Inter Tight,Inter,sans-serif}.tour-step-title{margin:0 0 .4rem;font:500 1.55rem/1.05 Instrument Serif,Georgia,serif}.tour-step-desc{color:var(--text-secondary);margin:0;font-size:.85rem;line-height:1.55}.tour-nav-actions{gap:.5rem;display:flex}.tour-btn-skip,.tour-btn-nav{border-radius:0;padding:.5rem .65rem;font:700 .78rem/1 Inter Tight,Inter,sans-serif}.tour-btn-nav{cursor:pointer;align-items:center;gap:.25rem;display:inline-flex}.tour-btn-back{border:1px solid var(--border);color:var(--text-primary);background:0 0}.tour-btn-next{box-shadow:none!important}.tour-centered-container{pointer-events:none;justify-content:center;align-items:center;padding:1.25rem;display:flex;position:absolute;inset:0}.tour-centered-card{width:min(440px,100%);position:relative;transform:rotate(-.25deg)}.tour-centered-card .tour-arrow-left{display:none}.animate-scale-up{animation:.28s ease-out forwards tour-sheet-in}@keyframes tour-sheet-in{0%{opacity:0;transform:translateY(10px)rotate(-.25deg)}to{opacity:1;transform:translateY(0)rotate(-.25deg)}}@media (prefers-reduced-motion:reduce){.tour-spotlight-pulse,.animate-scale-up{animation:none}}@media (width<=480px){.tour-card-inner{padding:1rem}.tour-body{grid-template-columns:34px 1fr}.tour-icon-wrap{width:32px;height:32px}.tour-step-title{font-size:1.35rem}.tour-footer{align-items:flex-end}.tour-btn-skip{padding-left:0}}.sidebar-header-row{margin-bottom:var(--sp-2xl);justify-content:space-between;align-items:center;display:flex}.sidebar-header-row--collapsed{margin-bottom:var(--sp-lg);flex-direction:column;justify-content:flex-start;gap:.35rem}.sidebar-brand-link{color:inherit;min-height:44px;text-decoration:none;display:block}.sidebar-header-row--collapsed .sidebar-brand-link{width:100%}.sidebar-brand-title{font-size:var(--fs-lg);margin:0;line-height:1.2}.sidebar-brand-subtitle{font-size:var(--fs-xs);margin:0}.sidebar-collapse-toggle{padding:var(--sp-2xs);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;justify-content:center;align-items:center;min-width:44px;min-height:44px;transition:color .15s,background .15s;display:flex}.sidebar-header-row--collapsed .sidebar-collapse-toggle{margin:0}.sidebar-nav{flex-direction:column;flex:1;gap:.25rem;display:flex}.sidebar-nav-link{align-items:center;gap:var(--sp-sm);padding:var(--sp-sm);border-radius:var(--radius-md);white-space:nowrap;min-height:44px;font-weight:500;text-decoration:none;transition:all .15s;display:flex;overflow:hidden}.sidebar-nav-icon{flex-shrink:0}.sidebar-nav-label-group{flex-direction:column;flex:1;gap:1px;display:flex}.sidebar-nav-label{line-height:1.2}.sidebar-nav-subtitle{color:var(--text-muted);font-size:.7rem;font-weight:400;line-height:1.2}.sidebar-nav-badge{font-size:var(--fs-xs);background:var(--primary);color:#fff;border-radius:4px;flex-shrink:0;margin-left:auto;padding:.15rem .4rem}.sidebar-nav-badge--count{letter-spacing:.01em;min-width:22px;height:22px;box-shadow:0 0 0 3px rgba(var(--primary-rgb), .14);border-radius:999px;justify-content:center;align-items:center;padding:0 7px;font-size:.72rem;font-weight:700;display:inline-flex}.sidebar-theme-btn{align-items:center;gap:var(--sp-sm);padding:var(--sp-sm);border-radius:var(--radius-md);color:var(--text-primary);border:1px solid var(--border);cursor:pointer;margin-top:var(--sp-lg);white-space:nowrap;background:#ffffff05;width:100%;min-height:44px;font-weight:500;display:flex;overflow:hidden}.sidebar-trial-banner{margin-top:var(--sp-md);padding:var(--sp-sm);background:rgba(var(--error-rgb), .1);border:1px solid rgba(var(--error-rgb), .2);border-radius:var(--radius-md);color:var(--error);font-size:var(--fs-sm);justify-content:center;align-items:center;font-weight:500;display:flex}.sidebar-trial-collapsed{margin-top:var(--sp-md);justify-content:center;display:flex}.sidebar-trial-dot{background:rgba(var(--error-rgb), .1);padding:var(--sp-2xs);color:var(--error);border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.sidebar-trial-dot span{font-size:var(--fs-xs);font-weight:700}.sidebar-xp-badge{padding:var(--sp-md);margin-top:var(--sp-lg);align-items:center;gap:var(--sp-md);display:flex}.sidebar-xp-icon{background:rgba(var(--secondary-rgb), .2);padding:var(--sp-xs);color:var(--secondary);border-radius:50%;flex-shrink:0}.sidebar-xp-label{font-size:var(--fs-xs);color:var(--text-secondary)}.sidebar-xp-value{font-weight:700;font-size:var(--fs-lg)}.sidebar-xp-collapsed{margin-top:var(--sp-lg);justify-content:center;display:flex}.sidebar-mascot-panel{margin-top:auto;margin-bottom:var(--sp-sm);align-items:center;gap:var(--sp-xs);background:rgba(var(--primary-rgb), .04);border:1px solid var(--border);border-radius:var(--radius-md);text-align:center;cursor:pointer;flex-direction:column;padding:.85rem .65rem;transition:background .2s,border-color .2s;display:flex;position:relative}.sidebar-mascot-panel:hover{background:rgba(var(--primary-rgb), .07);border-color:rgba(var(--primary-rgb), .24)}.sidebar-mascot-bubble{background:var(--surface-hover);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:var(--fs-xs);color:var(--text-primary);word-break:break-word;max-width:100%;margin-bottom:.2rem;padding:.35rem .5rem;line-height:1.4}.sidebar-mascot-status{font-size:var(--fs-xs);color:var(--text-secondary);align-items:center;gap:4px;margin-top:.15rem;font-weight:600;display:flex}.sidebar-mascot-dot{background:var(--success);border-radius:50%;width:5px;height:5px}.sidebar-premium-cta{margin-top:var(--sp-md);background:rgba(var(--secondary-rgb), .12);border:1px solid rgba(var(--secondary-rgb), .3);border-radius:var(--radius-md);color:var(--secondary);font-size:var(--fs-sm);justify-content:center;align-items:center;gap:.35rem;min-height:44px;padding:.65rem .85rem;font-weight:700;text-decoration:none;display:flex}.sidebar-user-panel{margin-top:var(--sp-sm);padding:var(--sp-xs);border:1px solid var(--border);border-radius:var(--radius-md);background:#ffffff05}.sidebar-user-link{align-items:center;gap:var(--sp-xs);padding:var(--sp-xs);border-radius:var(--radius-sm);color:var(--text-primary);min-height:44px;margin-bottom:.25rem;text-decoration:none;transition:background .15s;display:flex}.sidebar-user-link:hover{background:var(--surface-hover)}.sidebar-user-avatar{background:linear-gradient(135deg, rgba(var(--primary-rgb), .16), rgba(var(--secondary-rgb), .22));width:38px;height:38px;color:var(--primary);letter-spacing:.05em;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.82rem;font-weight:800;display:inline-flex;overflow:hidden}.sidebar-user-avatar.has-image{background:rgba(var(--primary-rgb), .08)}.sidebar-user-avatar.is-premium{box-shadow:0 0 0 2px rgba(var(--bg-rgb), 1), 0 0 0 4px rgba(var(--secondary-rgb), .32)}.sidebar-user-avatar img{object-fit:cover;width:100%;height:100%;display:block}.sidebar-user-meta{flex:1;min-width:0}.sidebar-user-name{font-size:var(--fs-sm);text-overflow:ellipsis;white-space:nowrap;font-weight:500;overflow:hidden}.sidebar-user-email{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;margin-top:.15rem;font-size:.72rem;overflow:hidden}.sidebar-user-badge-pro{background:rgba(var(--secondary-rgb), .16);color:var(--secondary-deep);vertical-align:middle;border-radius:4px;margin-left:6px;padding:.1rem .35rem;font-size:.65rem;font-weight:800}.sidebar-user-badge-admin{background:rgba(var(--primary-rgb), .15);color:var(--primary);vertical-align:middle;border-radius:4px;margin-left:6px;padding:.1rem .3rem;font-size:.65rem;font-weight:700}.sidebar-secondary-link{align-items:center;gap:var(--sp-xs);padding:var(--sp-xs);border-radius:var(--radius-sm);color:var(--text-secondary);margin-bottom:var(--sp-xs);font-size:var(--fs-sm);min-height:44px;font-weight:500;text-decoration:none;transition:all .15s;display:flex}.sidebar-secondary-link:hover{background:var(--surface-hover);color:var(--text-primary)}.sidebar-admin-link{align-items:center;gap:var(--sp-xs);padding:var(--sp-xs);border-radius:var(--radius-sm);color:var(--primary);margin-bottom:var(--sp-xs);font-size:var(--fs-sm);background:rgba(var(--primary-rgb), .05);min-height:44px;font-weight:500;text-decoration:none;transition:all .15s;display:flex}.sidebar-admin-link:hover{background:rgba(var(--primary-rgb), .1)}.sidebar-signout-btn{align-items:center;gap:var(--sp-xs);width:100%;padding:var(--sp-xs) .65rem;border-radius:var(--radius-sm);background:rgba(var(--error-rgb), .08);border:1px solid rgba(var(--error-rgb), .15);color:var(--error);font-size:var(--fs-sm);cursor:pointer;min-height:44px;font-weight:500;transition:all .15s;display:flex}.sidebar-signout-btn:hover{background:rgba(var(--error-rgb), .15)}.sidebar-signout-collapsed{margin-top:var(--sp-sm);padding:var(--sp-xs);border-radius:var(--radius-sm);background:rgba(var(--error-rgb), .08);border:1px solid rgba(var(--error-rgb), .15);color:var(--error);cursor:pointer;justify-content:center;align-items:center;width:100%;display:flex}.mobile-menu-btn{color:var(--text-primary);cursor:pointer;justify-content:center;align-items:center;min-width:44px;min-height:44px;display:flex}.mobile-brand-link{font-size:var(--fs-lg);align-items:center;min-height:44px;font-weight:700;text-decoration:none;display:flex}.mobile-xp-badge{background:rgba(var(--secondary-rgb), .1);border-radius:var(--radius-sm);align-items:center;gap:.35rem;min-height:44px;padding:.25rem .6rem;display:flex}.mobile-xp-value{font-size:var(--fs-xs);color:var(--text-primary);font-weight:700}.floating-help-container{bottom:var(--sp-lg);right:var(--sp-lg);z-index:9999;position:fixed}.floating-help-btn{background:var(--primary);color:#fff;cursor:pointer;border:1px solid #0000;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.floating-help-menu{width:200px;padding:var(--sp-sm);gap:var(--sp-xs);flex-direction:column;animation:.2s fadeIn;display:flex;position:absolute;bottom:55px;right:0}.floating-help-title{font-size:var(--fs-xs);color:var(--text-secondary);padding:0 var(--sp-xs) .25rem var(--sp-xs);border-bottom:1px solid var(--border);font-weight:600}.floating-help-item{align-items:center;gap:var(--sp-xs);padding:var(--sp-xs);border-radius:var(--radius-sm);font-size:var(--fs-sm);text-align:left;cursor:pointer;width:100%;color:var(--text-primary);background:0 0;border:none;text-decoration:none;display:flex}.floating-help-item:hover{background:var(--surface-hover)}.floating-help-item.secondary{color:var(--text-secondary)}.floating-help-item.secondary:hover{color:var(--text-primary)}.piaf-workbook-app{--workbook-paper:color-mix(in srgb, var(--modal-bg) 94%, var(--bg-color) 6%);--workbook-paper-warm:color-mix(in srgb, var(--bg-color) 90%, var(--secondary) 10%);--workbook-desk:color-mix(in srgb, var(--bg-color) 96%, var(--secondary) 4%);--workbook-rule:color-mix(in srgb, var(--border) 82%, var(--text-primary) 18%);--workbook-rule-strong:color-mix(in srgb, var(--border) 48%, var(--text-primary) 52%);--workbook-red-line:rgba(var(--primary-rgb), .42);--workbook-gold-wash:rgba(var(--secondary-rgb), .12);--workbook-sage-wash:rgba(var(--success-rgb), .12);--workbook-shadow:4px 5px 0 color-mix(in srgb, var(--text-primary) 10%, transparent);--workbook-radius:4px;--workbook-radius-soft:8px;background:var(--workbook-desk);color:var(--text-primary)}body.light .piaf-workbook-app{--workbook-paper:#fffdf7;--workbook-paper-warm:#f8efdd;--workbook-desk:#faf3e5;--workbook-rule:#d9ceb8;--workbook-rule-strong:#2418127a;--workbook-shadow:4px 5px 0 #543d261a}.piaf-workbook-app .app-main-content{background-color:var(--workbook-desk);background-image:linear-gradient(to right, transparent 31px, rgba(var(--primary-rgb), .1) 31px, rgba(var(--primary-rgb), .1) 32px, transparent 32px), repeating-linear-gradient(to bottom, transparent 0, transparent 31px, color-mix(in srgb, var(--workbook-rule) 28%, transparent) 32px);background-position:0 0,0 7px;max-width:none;position:relative}.piaf-workbook-app .glass-panel{background:var(--workbook-paper);border:1px solid var(--workbook-rule);border-radius:var(--workbook-radius-soft);box-shadow:var(--workbook-shadow);-webkit-backdrop-filter:none}.piaf-workbook-app .btn-primary{border:1px solid color-mix(in srgb, var(--primary) 72%, var(--text-primary) 28%);background:var(--primary);color:#fffaf0;box-shadow:3px 3px 0 color-mix(in srgb, var(--text-primary) 72%, transparent);font-family:var(--font-heading);letter-spacing:.01em;border-radius:3px;font-weight:750}.piaf-workbook-app .btn-primary:hover:not(:disabled){background:var(--primary-hover);box-shadow:4px 4px 0 color-mix(in srgb, var(--text-primary) 72%, transparent);transform:translate(-1px,-1px)}.piaf-workbook-app .btn-outline{border-color:var(--workbook-rule-strong);background:color-mix(in srgb, var(--workbook-paper) 88%, transparent);font-family:var(--font-heading);border-radius:3px;font-weight:650}.piaf-workbook-app .btn-outline:hover:not(:disabled){background:var(--workbook-paper-warm);border-color:var(--text-primary)}.editorial-page{width:min(100%,1240px);margin-inline:auto;padding:clamp(1rem,2.5vw,2.5rem)}.editorial-page-header{align-items:end;gap:var(--sp-xl);padding-bottom:var(--sp-lg);border-bottom:1px solid var(--workbook-rule-strong);grid-template-columns:minmax(0,1fr) auto;display:grid}.editorial-eyebrow,.grammar-label{border-bottom:1px solid var(--primary);width:max-content;color:var(--primary);font-family:var(--font-heading);font-size:var(--fs-xs);letter-spacing:.12em;text-transform:uppercase;align-items:center;gap:.4rem;padding-bottom:.32rem;font-weight:800;display:inline-flex}.cahier-sheet{background-color:var(--workbook-paper);background-image:repeating-linear-gradient(to bottom, transparent 0, transparent 31px, color-mix(in srgb, var(--workbook-rule) 42%, transparent) 32px);border:1px solid var(--workbook-rule-strong);box-shadow:var(--workbook-shadow);border-radius:2px;padding:clamp(1.25rem,3vw,2.5rem) clamp(1rem,3vw,2.5rem) clamp(1.5rem,3vw,3rem) clamp(3rem,6vw,5rem);position:relative;overflow:hidden}.cahier-sheet:before{content:"";background:var(--workbook-red-line);width:1px;position:absolute;top:0;bottom:0;left:clamp(2rem,4vw,3.5rem)}.study-ledger{border-top:1px solid var(--workbook-rule-strong);border-bottom:1px solid var(--workbook-rule-strong);background:color-mix(in srgb, var(--workbook-paper) 92%, transparent)}.study-ledger-row{gap:var(--sp-md);min-height:52px;padding:var(--sp-sm) var(--sp-md);border-bottom:1px solid var(--workbook-rule);grid-template-columns:minmax(0,1fr) auto;align-items:center;display:grid}.study-ledger-row:last-child{border-bottom:0}.margin-note,.piaf-note{padding:var(--sp-md) var(--sp-lg);background:var(--workbook-paper-warm);border:1px solid var(--workbook-rule-strong);color:var(--text-secondary);font-family:var(--font-accent);border-radius:2px;font-style:italic;line-height:1.55;position:relative;transform:rotate(-.5deg)}.status-stamp{min-height:26px;font-family:var(--font-heading);letter-spacing:.09em;text-transform:uppercase;border:1px solid;border-radius:2px;justify-content:center;align-items:center;padding:.25rem .62rem;font-size:.68rem;font-weight:850;display:inline-flex;transform:rotate(-1deg)}.status-stamp--complete,.status-stamp--mastered,.status-stamp--synced{color:var(--success);background:var(--workbook-sage-wash)}.status-stamp--current,.status-stamp--premium{color:var(--secondary-deep);background:var(--workbook-gold-wash)}.status-stamp--due,.status-stamp--error{color:var(--primary);background:rgba(var(--primary-rgb), .08)}.status-stamp--locked{color:var(--text-muted);background:var(--surface)}.correction-rule{border-bottom:2px solid var(--primary);text-decoration:none}.binder-tabs{border-bottom:1px solid var(--workbook-rule-strong);align-items:flex-end;gap:.35rem;display:flex}.binder-tab{border:1px solid var(--workbook-rule);background:var(--workbook-paper-warm);min-height:40px;color:var(--text-secondary);font-family:var(--font-heading);font-size:var(--fs-sm);border-bottom:0;border-radius:3px 3px 0 0;padding:.6rem .9rem;font-weight:700}.binder-tab[aria-selected=true],.binder-tab.active{background:var(--workbook-paper);color:var(--primary);border-color:var(--workbook-rule-strong);box-shadow:inset 0 3px 0 var(--primary)}.piaf-workbook-app .app-sidebar{background-color:var(--workbook-paper);background-image:repeating-linear-gradient(to bottom, transparent 0, transparent 31px, color-mix(in srgb, var(--workbook-rule) 26%, transparent) 32px);border-right:1px solid var(--workbook-rule-strong);box-shadow:inset -7px 0 0 var(--workbook-gold-wash);position:relative}.piaf-workbook-app .app-sidebar:after{content:"";background:rgba(var(--primary-rgb), .22);pointer-events:none;width:1px;position:absolute;top:0;bottom:0;right:7px}.piaf-workbook-app .sidebar-header-row{margin-bottom:var(--sp-lg);padding-bottom:var(--sp-md);border-bottom:1px solid var(--workbook-rule-strong);position:relative}.piaf-workbook-app .sidebar-brand-subtitle{border:1px solid 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#0000008c}.auth-chalk-cafe{text-align:center;font-family:var(--font-accent);letter-spacing:.06em;color:#f3ebd999;font-size:.95rem;font-style:italic;display:block}.auth-chalk-title{text-align:center;font-family:var(--font-display);color:#f7f0df;text-shadow:0 0 7px #f7f0df47;margin:.1rem 0 .35rem;font-size:clamp(2rem,2.6vw,2.6rem);line-height:1.05;display:block}.auth-chalk-flourish{text-align:center;color:#d19a2ae6;letter-spacing:.3em;margin-bottom:clamp(.7rem,1.8vh,1.25rem);font-size:.6rem;display:block}.auth-chalk-menu{flex-direction:column;gap:clamp(.55rem,1.5vh,.9rem);margin:0;padding:0;list-style:none;display:flex}.auth-chalk-menu li{font-family:var(--font-heading);color:#efe6d2;align-items:baseline;gap:.55rem;font-size:.86rem;font-weight:600;display:flex}.auth-chalk-item{text-shadow:0 0 5px #f3ebd92e}.auth-chalk-leader{border-bottom:2px dotted #f3ebd94d;flex:1;min-width:1.5rem;transform:translateY(-.28em)}.auth-chalk-price{font-family:var(--font-accent);white-space:nowrap;color:#e3b04b;text-shadow:0 0 6px #e3b04b4d;font-size:.92rem;font-style:italic}.auth-chalk-footnote{text-align:right;font-family:var(--font-accent);color:#f3ebd980;margin-top:clamp(.8rem,2vh,1.35rem);font-size:.8rem;font-style:italic;display:block}.auth-chalk-tray{background:#3a2a1c;border:1px solid #241812;border-radius:2px;height:9px;position:absolute;bottom:-16px;left:7%;right:7%;box-shadow:0 3px #0000004d}.auth-chalk-stick{background:#efe6d2;border-radius:3px;width:34px;height:6px;position:absolute;top:-5px;right:11%;transform:rotate(-2deg);box-shadow:0 1px 2px #0006}.auth-brand-foot{grid-template-columns:1fr auto;align-items:center;gap:.4rem;margin-top:clamp(1.2rem,3.4vh,2.4rem);display:grid}.auth-form-panel{background-color:var(--auth-cream);background-image:linear-gradient(90deg,#0000 0 46px,#be322b2e 46px 47px,#0000 47px),repeating-linear-gradient(#0000 0 31px,#5b443017 32px);padding:clamp(.75rem,2.5vh,4rem) clamp(1.5rem,4vw,4rem)}.auth-form-panel:before{display:none}.login-card{border:1px solid var(--auth-espresso);background:var(--auth-paper);border-radius:3px;width:min(92vw,450px);padding:clamp(2.4rem,5.5vh,3.25rem) clamp(1.35rem,3vw,2.35rem) clamp(1.35rem,3vh,2rem);box-shadow:8px 9px #d19a2a29}.login-card:before{content:"PIAF · STUDY ACCESS";border-right:1px solid var(--auth-espresso);border-bottom:1px solid var(--auth-espresso);background:var(--primary);color:#fffaf0;font-family:var(--font-heading);letter-spacing:.12em;padding:.45rem .65rem;font-size:.58rem;font-weight:850;position:absolute;top:0;left:0}.login-page--signup .login-card:before{content:"PIAF · NEW CAHIER";background:var(--auth-dijon);color:var(--auth-espresso)}.login-page--forgot .login-card:before{content:"PIAF · ACCOUNT NOTE"}.login-page:lang(fr) .login-card:before{content:"PIAF · ACCÈS COURS"}.login-page--signup:lang(fr) .login-card:before{content:"PIAF · NOUVEAU CAHIER"}.login-page--forgot:lang(fr) .login-card:before{content:"PIAF · NOTE DE COMPTE"}.login-page:lang(fr) .auth-brand-panel:before{content:"PIAF · BUREAU D'ÉTUDE FRANÇAIS"}.auth-form-panel{position:relative}.auth-controls{z-index:3;gap:.35rem;display:flex;position:absolute;top:clamp(.75rem,2vh,1.5rem);right:clamp(.75rem,2vw,1.5rem)}.auth-control-btn{border:1px solid var(--auth-espresso);background:var(--auth-paper);min-width:40px;min-height:40px;color:var(--auth-espresso);font-family:var(--font-heading);letter-spacing:.06em;cursor:pointer;box-shadow:2px 2px 0 var(--auth-espresso);border-radius:2px;justify-content:center;align-items:center;gap:.3rem;padding:0 .55rem;font-size:.7rem;font-weight:800;transition:background .2s,transform .15s,box-shadow .15s;display:inline-flex}.auth-control-btn:hover{box-shadow:3px 3px 0 var(--auth-espresso);background:#fff7e5;transform:translate(-1px,-1px)}.auth-control-btn:active{box-shadow:1px 1px 0 var(--auth-espresso);transform:translate(0)}.auth-control-btn svg{display:block}.login-page.is-dark{--auth-paper:#201814;--auth-cream:#16110d;--auth-espresso:#f2e6cf;--auth-rule:#3a2a1c;--auth-dijon:#e3b04b;--text-primary:#f2e6cf;--text-secondary:#baa387;--text-muted:#8c7a65;--border:#3a2a1c;--modal-bg:#201814;--bg-color:#16110d;--primary:#e85a4f;--primary-rgb:232, 90, 79;--primary-hover:#f07a6f;--success-dark:#a8b87a;--success:#a8b87a;--success-rgb:168, 184, 122;--error:#f87171;--error-rgb:248, 113, 113;background-color:var(--auth-cream);color:var(--text-primary);background-image:repeating-linear-gradient(#0000 0 31px,#f2e6cf0f 32px)}.login-page.is-dark .auth-brand-panel{background-color:#0e0a07;background-image:radial-gradient(130% 110% at 82% 6%,#fffdf70d,#0000 60%);border-right-color:#000}.login-page.is-dark .auth-form-panel{background-color:var(--auth-cream);background-image:linear-gradient(90deg,#0000 0 46px,#e85a4f47 46px 47px,#0000 47px),repeating-linear-gradient(#0000 0 31px,#f2e6cf0f 32px)}.login-page.is-dark .login-card{color:var(--text-primary);background:#241a15;border-color:#3a2a1c;box-shadow:8px 9px #e3b04b24}.login-page.is-dark .login-card:before{background:var(--primary);color:#fffaf0;border-color:#3a2a1c}.login-page.is-dark.login-page--signup .login-card:before{background:var(--auth-dijon);color:#14100c}.login-page.is-dark .auth-form-title{color:var(--text-primary)}.login-page.is-dark .login-subtitle{color:var(--text-secondary)}.login-page.is-dark .form-group label{color:var(--text-primary)}.login-page.is-dark .form-group input{color:var(--text-primary);background:#1a1310;border-color:#4a3524}.login-page.is-dark .form-group input:focus{border-color:var(--primary);box-shadow:inset 4px 0 0 var(--primary), 0 0 0 2px rgba(var(--primary-rgb), .15);background:#241a15}.login-page.is-dark .form-group input::placeholder{color:#6b5b4a}.login-page.is-dark .form-group input:-webkit-autofill{-webkit-text-fill-color:var(--text-primary)!important;box-shadow:inset 0 0 0 1000px #1a1310!important}.login-page.is-dark .form-group input:-webkit-autofill:hover{-webkit-text-fill-color:var(--text-primary)!important;box-shadow:inset 0 0 0 1000px #1a1310!important}.login-page.is-dark .form-group input:-webkit-autofill:focus{-webkit-text-fill-color:var(--text-primary)!important;box-shadow:inset 0 0 0 1000px #1a1310!important}.login-page.is-dark .form-group input:-webkit-autofill:active{-webkit-text-fill-color:var(--text-primary)!important;box-shadow:inset 0 0 0 1000px #1a1310!important}.login-page.is-dark .auth-password-toggle{color:var(--text-secondary)}.login-page.is-dark .auth-password-toggle:hover{color:var(--text-primary);background:#1a1310;border-color:#4a3524}.login-page.is-dark .auth-submit-btn{border-color:#3a2a1c;box-shadow:3px 3px #3a2a1c}.login-page.is-dark .auth-google-btn{color:var(--text-primary);background:#241a15;border-color:#3a2a1c;box-shadow:3px 3px #3a2a1c}.login-page.is-dark .auth-google-btn:hover:not(:disabled){background:#2b1f19;box-shadow:4px 4px #3a2a1c}.login-page.is-dark .auth-divider{color:var(--text-muted)}.login-page.is-dark .auth-divider:before,.login-page.is-dark .auth-divider:after{background:#3a2a1c}.login-page.is-dark .auth-toggle-prompt{color:var(--text-secondary)}.login-page.is-dark .login-back-link{color:var(--text-muted)}.login-page.is-dark .login-back-link:hover{color:var(--text-secondary)}.login-page.is-dark .auth-error-alert,.login-page.is-dark .auth-success-alert{color:var(--text-primary);background:#1a1310}.login-page.is-dark .auth-motto-box{color:#241812;background-color:#f4e5c2;background-image:repeating-linear-gradient(#0000 0 27px,#5b443024 28px);border-color:#000}.login-page.is-dark .auth-motto-fr{color:#241812}.login-page.is-dark .auth-motto-en{color:#6f6258}.login-page.is-dark .auth-control-btn{color:var(--text-primary);background:#241a15;border-color:#4a3524;box-shadow:2px 2px #3a2a1c}.login-page.is-dark .auth-control-btn:hover{background:#2b1f19;box-shadow:3px 3px #3a2a1c}.login-page.is-dark .login-logo-mobile{color:var(--text-primary)}.login-header{text-align:left;margin-bottom:clamp(1rem,2.6vh,1.75rem)}.auth-form-title{color:var(--auth-espresso);font-family:var(--font-display);letter-spacing:-.025em;margin:0 0 .35rem;font-size:clamp(2.25rem,4vw,3.25rem);font-weight:500;line-height:1}.login-subtitle{color:#6f6258;max-width:38ch;font-size:.94rem;line-height:1.6}.custom-login-form{gap:1rem}.form-group{gap:.42rem}.form-group label{color:var(--auth-espresso);font-family:var(--font-heading);letter-spacing:.08em;text-transform:uppercase;font-size:.7rem;font-weight:800}.form-group input{border-color:var(--auth-espresso);min-height:48px;color:var(--auth-espresso);background:#fbf5e9;border-radius:1px}.form-group input:focus{border-color:var(--primary);background:var(--auth-paper);box-shadow:inset 4px 0 0 var(--primary), 0 0 0 2px rgba(var(--primary-rgb), .1)}.auth-password-toggle{border:1px solid #0000;border-radius:1px}.auth-password-toggle:hover{border-color:var(--auth-rule);background:#f3e7d1}.auth-submit-btn{border:1px solid var(--auth-espresso);min-height:48px;box-shadow:3px 3px 0 var(--auth-espresso);font-family:var(--font-heading);border-radius:2px}.auth-error-alert,.auth-success-alert{background:var(--auth-paper);border-radius:1px}.auth-error-alert{border-left:5px solid var(--primary)}.auth-success-alert{border-left:5px solid var(--success-dark)}.auth-toggle-prompt{color:#6f6258;text-align:left;margin-top:1.5rem}.auth-toggle-link:after{background:var(--primary);height:1px}.auth-toggle-link:hover{color:var(--primary-hover)}.login-back-link{color:#7e7268;text-align:left;width:fit-content;margin-top:1.25rem}.login-logo-mobile{-webkit-text-fill-color:currentColor;color:var(--auth-espresso);background:0 0;margin-bottom:1rem}.login-page>.login-card{margin:max(2rem,12vh) auto}.login-page--signup .login-card{padding-top:clamp(1.6rem,3.2vh,2.1rem);padding-bottom:clamp(.9rem,2vh,1.4rem)}.login-page--signup .login-header{margin-bottom:clamp(.4rem,1.1vh,.75rem)}.login-page--signup .login-subtitle{line-height:1.45}.login-page--signup .custom-login-form{gap:.6rem}.login-page--signup .form-group input{min-height:44px}.login-page--signup .auth-google-btn{min-height:46px}.login-page--signup .auth-divider{margin:.6rem 0}.login-page--signup .auth-toggle-prompt{margin-top:.85rem}.login-page--signup .login-back-link{margin-top:.7rem}@media (width<=1024px){.auth-form-panel{background-color:var(--auth-cream);background-image:linear-gradient(90deg,#0000 0 34px,#be322b2e 34px 35px,#0000 35px),repeating-linear-gradient(#0000 0 31px,#5b443017 32px);padding:clamp(1rem,4vw,2.5rem)}.login-card{box-shadow:6px 7px #d19a2a24}}@media (width<=480px){.auth-form-panel{align-items:flex-start;padding:.75rem}.login-card{border-radius:2px;width:100%;padding:3rem 1rem 1.35rem;box-shadow:4px 5px #d19a2a21}.auth-form-title{font-size:2.15rem}}.not-found-wrapper{background:repeating-linear-gradient(to bottom,var(--bg-color) 0,var(--bg-color) 31px,color-mix(in srgb,var(--border) 35%,transparent) 32px);min-height:100dvh;color:var(--text-primary);place-items:center;padding:1.5rem;display:grid;position:relative;overflow:hidden}.not-found-wrapper:before{content:"";border-left:1px solid color-mix(in srgb,var(--primary) 45%,transparent);position:absolute;top:0;bottom:0;left:max(1.5rem,50% - 290px)}.not-found-container{z-index:2;width:min(540px,100%);padding:clamp(2rem,6vw,4rem);position:relative;border:1px solid var(--text-primary)!important;border-top:6px solid var(--primary)!important;background:var(--surface)!important;box-shadow:11px 11px 0 color-mix(in srgb,var(--secondary) 28%,transparent)!important;text-align:left!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important;border-radius:0!important;align-items:flex-start!important}.not-found-mascot{align-self:center;margin-bottom:1rem;animation:none}.error-code{color:var(--primary);-webkit-text-fill-color:currentColor;letter-spacing:.18em;background:0 0;margin-bottom:.4rem;font:800 .72rem/1 Inter Tight,Inter,sans-serif;display:block}.error-title{margin:0 0 .8rem;font:500 clamp(2.8rem,7vw,4.3rem)/.95 Instrument Serif,Georgia,serif}.error-message,.error-details{color:var(--text-secondary);line-height:1.65}.error-details{border-top:1px solid var(--border);width:100%;padding-top:1rem}.back-btn{background:var(--primary);color:#fff;box-shadow:none;border:0;border-radius:2px;align-items:center;gap:.5rem;padding:.75rem 1rem;font:750 .86rem/1 Inter Tight,Inter,sans-serif;text-decoration:none;display:inline-flex}.decor-blob{display:none!important}@media (width<=480px){.not-found-container{padding:2rem 1.4rem;box-shadow:6px 6px 0 color-mix(in srgb,var(--secondary) 28%,transparent)!important}}