*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#F5F7FA;--card-bg:#FFFFFF;--card-shadow:0 2px 8px rgba(0,0,0,.08);--primary:#E85D04;--primary-light:#FFF7ED;--text:#1A1F2E;--text-muted:#6B7280;--success:#16A34A;--success-light:#F0FDF4;--warning:#D97706;--warning-light:#FFFBEB;--danger:#DC2626;--danger-light:#FEF2F2;--border:#E5E7EB;--radius:12px}html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100dvh}a{color:var(--primary);text-decoration:none}button{cursor:pointer;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;padding:.75rem 1.5rem;transition:all .15s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#d14f03;box-shadow:0 2px 8px #e85d044d}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:#f9fafb;border-color:#d1d5db}.btn-icon{background:transparent;padding:.5rem;font-size:1.5rem;line-height:1}.card{background:var(--card-bg);border-radius:var(--radius);padding:1.25rem;box-shadow:var(--card-shadow);transition:box-shadow .15s}.card:hover{box-shadow:0 4px 16px #0000001f}.container{max-width:960px;margin:0 auto;padding:1rem}input,textarea,select{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);background:#fff;color:var(--text);font-size:1rem}input:focus,textarea:focus,select:focus{outline:2px solid var(--primary);outline-offset:-1px}label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:.25rem;font-weight:500}.field{margin-bottom:1rem}.loading{display:flex;justify-content:center;align-items:center;min-height:50vh;color:var(--text-muted);font-size:1.1rem}.top-nav{display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);padding:0 1.5rem;height:56px;z-index:100}.top-nav .logo{font-weight:700;font-size:1.1rem;color:var(--primary);display:flex;align-items:center;gap:.35rem}.top-nav .nav-links{display:flex;gap:.25rem}.top-nav .nav-links a{padding:.5rem .75rem;border-radius:8px;font-size:.85rem;font-weight:500;color:var(--text-muted);transition:all .15s}.top-nav .nav-links a:hover{background:#f3f4f6;color:var(--text)}.top-nav .nav-links a.active{color:var(--primary);font-weight:700;background:var(--primary-light)}.nav{display:none}.page{padding-top:.5rem;padding-bottom:2rem}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-bottom:1rem}@media(min-width:768px){.stat-grid{grid-template-columns:repeat(3,1fr)}}.stat-box{background:var(--card-bg);border-radius:var(--radius);padding:1rem;text-align:center;box-shadow:var(--card-shadow)}.stat-box .value{font-size:1.5rem;font-weight:700;color:var(--primary)}.stat-box .label{font-size:.75rem;color:var(--text-muted);margin-top:.15rem;font-weight:500}.activity-card{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;background:var(--card-bg);border-radius:var(--radius);margin-bottom:.5rem;cursor:pointer;transition:all .15s;box-shadow:var(--card-shadow)}.activity-card:hover{box-shadow:0 4px 16px #0000001f;transform:translateY(-1px)}.activity-card .meta{font-size:.8rem;color:var(--text-muted)}.analysis-box{background:#f9fafb;border-radius:var(--radius);padding:1.25rem;margin-top:.75rem;white-space:pre-wrap;line-height:1.7;border:1px solid var(--border);font-size:.9rem}.feedback-row{display:flex;gap:.75rem;margin-top:.75rem;justify-content:center}.hero-card{border-radius:var(--radius);padding:1.5rem;margin-bottom:1rem;border-left:4px solid;box-shadow:var(--card-shadow)}.hero-ready{background:var(--success-light);border-color:var(--success)}.hero-moderate{background:var(--warning-light);border-color:var(--warning)}.hero-recovery{background:var(--danger-light);border-color:var(--danger)}.strava-btn{display:inline-flex;align-items:center;gap:.5rem;background:#fc4c02;color:#fff;padding:1rem 2rem;border-radius:var(--radius);font-size:1.1rem;font-weight:700}.strava-btn:hover{background:#e84400}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.header h1{font-size:1.3rem}.badge{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.7rem;font-weight:600;background:#f3f4f6;color:var(--text-muted)}@media(min-width:768px){.two-col{display:grid;grid-template-columns:1fr 1fr;gap:1rem}}