@import "https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;700&family=Poppins:wght@400;500;600;700&display=swap";:root{--color-primary:#ff4343;--color-primary-hover:#e63b3b;--color-accent:#efffc5;--color-black:#363b3e;--color-white:#fff;--color-lavender:#e4e9ff;--color-light-gray:#f5f5f5;--color-medium-gray:#aeaeae;--color-border:#e0e0e0;--color-success:#27ae60;--color-error:#e74c3c;--color-warning:#f39c12;--font-serif:"Source Serif 4", Georgia, serif;--font-sans:"Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--sidebar-width:280px;--header-height:64px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;font-size:16px}body{font-family:var(--font-sans);color:var(--color-black);background:var(--color-white);line-height:1.6}h1,h2,h3,h4,h5{font-family:var(--font-serif);font-weight:700;line-height:1.3}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:var(--font-sans)}input,textarea,select{font-family:var(--font-sans);font-size:.95rem}#root{min-height:100vh}.app-layout{min-height:100vh;display:flex}.main-area{margin-left:var(--sidebar-width);flex-direction:column;flex:1;display:flex}.main-content{flex:1;width:100%;max-width:900px;margin:0 auto;padding:2rem}.app-header{height:var(--header-height);border-bottom:1px solid var(--color-border);background:var(--color-white);z-index:10;align-items:center;padding:0 1.5rem;display:flex;position:sticky;top:0}.header-title{font-family:var(--font-serif);font-size:1.1rem;font-weight:700}.header-right{align-items:center;gap:1rem;margin-left:auto;display:flex}.header-user{color:var(--color-medium-gray);font-size:.85rem}.header-logout{color:var(--color-primary);background:0 0;border:none;font-size:.85rem;font-weight:500}.menu-toggle{background:0 0;border:none;flex-direction:column;gap:4px;margin-right:.75rem;padding:.5rem;display:none}.menu-toggle span{background:var(--color-black);width:20px;height:2px;display:block}.sidebar{width:var(--sidebar-width);background:var(--color-white);border-right:1px solid var(--color-border);z-index:100;flex-direction:column;height:100vh;display:flex;position:fixed;top:0;left:0;overflow-y:auto}.sidebar-overlay{display:none}.sidebar-brand{border-bottom:1px solid var(--color-border);padding:1.25rem 1.5rem}.sidebar-brand a{color:var(--color-black);align-items:center;gap:.75rem;text-decoration:none;display:flex}.brand-logo{background:var(--color-primary);width:36px;height:36px;color:var(--color-white);border-radius:8px;justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.brand-text{font-size:.9rem;font-weight:600}.sidebar-nav{flex:1;padding:.75rem 0}.nav-item{color:var(--color-black);padding:.6rem 1.5rem;font-size:.9rem;font-weight:500;text-decoration:none;transition:background .15s;display:block}.nav-item:hover,.nav-item.active{background:var(--color-light-gray);text-decoration:none}.nav-item.active{color:var(--color-primary);border-right:3px solid var(--color-primary)}.nav-section{margin-top:.25rem}.nav-section-header{text-align:left;width:100%;color:var(--color-black);cursor:pointer;background:0 0;border:none;align-items:center;gap:.5rem;padding:.6rem 1.5rem;font-size:.9rem;font-weight:500;display:flex}.nav-section-header:hover{background:var(--color-light-gray)}.nav-section-number{color:var(--color-primary);min-width:16px;font-size:.85rem;font-weight:700}.nav-section-title{flex:1}.nav-badge{text-transform:uppercase;letter-spacing:.05em;background:var(--color-lavender);color:var(--color-medium-gray);border-radius:4px;padding:.15rem .4rem;font-size:.65rem;font-weight:600}.nav-chevron{color:var(--color-medium-gray);font-size:.7rem;transition:transform .2s}.nav-chevron.expanded{transform:rotate(90deg)}.nav-exercises{padding:.25rem 0}.nav-exercise{color:var(--color-black);align-items:center;gap:.5rem;padding:.45rem 1.5rem .45rem 2.5rem;font-size:.82rem;text-decoration:none;transition:background .15s;display:flex}.nav-exercise:hover{background:var(--color-light-gray);text-decoration:none}.nav-exercise.active{color:var(--color-primary);background:var(--color-light-gray)}.nav-exercise-number{color:var(--color-medium-gray);min-width:24px;font-size:.75rem}.nav-exercise-title{white-space:nowrap;text-overflow:ellipsis;flex:1;overflow:hidden}.status-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.dot-empty{border:1.5px solid var(--color-border);background:0 0}.dot-progress{background:var(--color-warning)}.dot-complete{background:var(--color-success)}.nav-divider{background:var(--color-border);height:1px;margin:.75rem 1.5rem}@media (width<=768px){.sidebar{transition:transform .3s;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay{z-index:99;background:#0000004d;display:block;position:fixed;inset:0}.main-area{margin-left:0}.menu-toggle{display:flex}}.auth-page{background:var(--color-light-gray);justify-content:center;align-items:center;min-height:100vh;padding:1rem;display:flex}.auth-card{background:var(--color-white);border-radius:12px;width:100%;max-width:420px;padding:2.5rem;box-shadow:0 4px 24px #00000014}.auth-brand{text-align:center;margin-bottom:2rem}.auth-logo{background:var(--color-primary);width:56px;height:56px;color:var(--color-white);border-radius:12px;justify-content:center;align-items:center;margin-bottom:1rem;font-size:1.2rem;font-weight:700;display:inline-flex}.auth-brand h1{margin-bottom:.25rem;font-size:1.5rem}.auth-subtitle{color:var(--color-medium-gray);font-size:.9rem}.auth-tabs{border-bottom:2px solid var(--color-border);margin-bottom:1.5rem;display:flex}.auth-tab{color:var(--color-medium-gray);background:0 0;border:none;border-bottom:2px solid #0000;flex:1;margin-bottom:-2px;padding:.75rem;font-size:.9rem;font-weight:600}.auth-tab.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.auth-form{flex-direction:column;gap:1rem;display:flex}.auth-field label{margin-bottom:.3rem;font-size:.85rem;font-weight:600;display:block}.auth-field input{border:1px solid var(--color-border);border-radius:6px;width:100%;padding:.7rem;font-size:.95rem}.auth-field input:focus{border-color:var(--color-primary);outline:none}.auth-hint{color:var(--color-medium-gray);margin-top:.25rem;font-size:.75rem;display:block}.auth-error{color:var(--color-error);background:#fef2f2;border-radius:6px;padding:.6rem .8rem;font-size:.85rem}.auth-form .btn{width:100%;margin-top:.5rem}