:root{color-scheme:light;font-family:IBM Plex Sans,Segoe UI,sans-serif;line-height:1.4;--bg: #f2f4f8;--panel: #ffffff;--panel-2: #f7f9fc;--text: #16202a;--muted: #667788;--border: #dbe2ea;--brand: #0b6b5b;--brand-strong: #075042;--danger: #a32020}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top left,#dff3ee,#f2f4f8 45%,#eef2f7);color:var(--text)}.loading-screen,.login-page{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(480px,100%);border:1px solid var(--border);background:var(--panel);border-radius:14px;padding:24px;box-shadow:0 16px 40px #0f233714}.admin-shell{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{background:linear-gradient(190deg,#0d3e44,#0b2e36);color:#ecf5f8;padding:20px;display:flex;flex-direction:column;gap:16px}.brand h1{margin:0;font-size:1.3rem}.brand p{margin:0;color:#b4ccd4}.nav{display:flex;flex-direction:column;gap:8px}.nav-link{color:#c4dae0;text-decoration:none;border-radius:8px;padding:10px;transition:background .12s ease}.nav-link:hover{background:#ffffff14}.nav-link-active{background:#ffffff29;color:#fff}.sidebar-footer{margin-top:auto;display:grid;gap:10px}.user-chip{display:grid}.user-name{font-weight:700}.user-role{color:#b4ccd4;text-transform:uppercase;letter-spacing:.08em;font-size:.75rem}.main-content{padding:22px}.section-header h2{margin:0}.section-header p{margin-top:6px;color:var(--muted)}.toolbar{margin:12px 0;display:flex;gap:12px;flex-wrap:wrap}.grid-two{display:grid;grid-template-columns:minmax(250px,320px) 1fr;gap:16px;align-items:start}.grid-three{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:10px}.card{border:1px solid var(--border);border-radius:12px;background:var(--panel);padding:14px}.cards-stack{display:grid;gap:12px}.form-grid{display:grid;gap:10px}label{display:grid;gap:6px;font-size:.9rem}input,select,textarea,button{font:inherit}input,select,textarea{border:1px solid var(--border);border-radius:8px;padding:8px 10px;background:#fff}textarea{min-height:90px;resize:vertical}.button{border:1px solid var(--brand-strong);background:var(--brand);color:#fff;border-radius:8px;padding:8px 12px;cursor:pointer}.button:disabled{opacity:.5;cursor:not-allowed}.button-secondary{background:var(--panel-2);color:var(--text);border-color:var(--border)}.button-danger{background:#9d2b2b;border-color:#7c1f1f}.list-actions,.row-actions{display:flex;gap:8px;align-items:center;justify-content:space-between;margin-bottom:8px}.row-actions.compact{justify-content:flex-start;margin-bottom:6px}.resource-list,.compact-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}.scroll-list{max-height:72vh;overflow-y:auto;padding-right:4px}.list-meta{margin-bottom:8px}.video-preview{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--panel-2)}.video-preview iframe,.video-preview video{width:100%;min-height:220px;border:0;border-radius:8px;background:#000}.list-item-btn{width:100%;border:1px solid var(--border);border-radius:8px;background:var(--panel-2);padding:8px;display:flex;justify-content:space-between;cursor:pointer;text-align:left}.list-item-btn.active{border-color:var(--brand);background:#e7f6f3}.muted{color:var(--muted)}.small{font-size:.8rem}.error-box{border:1px solid #e8b8b8;background:#fff2f2;color:#8a1f1f;border-radius:8px;padding:8px}.warning-box{border:1px solid #e8d89b;background:#fff8e1;color:#725500;border-radius:8px;padding:8px;margin-bottom:8px}.success-box{border:1px solid #b8e3c5;background:#eefbf3;color:#1c6431;border-radius:8px;padding:8px;margin-bottom:8px}.checkbox-row{display:flex;align-items:center;gap:8px}.nested-block{margin-top:10px;border:1px dashed var(--border);border-radius:10px;padding:10px;background:var(--panel-2)}.nested-card{margin-top:8px}.nested-title{font-weight:700}.pill-wrap{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.workout-pill{padding:6px 8px;border-radius:20px;border:1px solid var(--border);background:#fff;cursor:grab}.schedule-grid{display:grid;grid-template-columns:repeat(7,minmax(120px,1fr));gap:8px}.day-column{border:1px dashed var(--border);border-radius:10px;min-height:180px;padding:8px;background:var(--panel-2)}.day-column-disabled{opacity:.5;background:#f2f3f6}.day-column h4{margin:0 0 8px}.day-slot{display:flex;flex-direction:column;align-items:flex-start;gap:6px;border:1px solid var(--border);border-radius:8px;background:#fff;padding:6px;margin-bottom:6px;cursor:grab}.day-slot>span{width:100%;word-break:break-word}.slot-actions{display:flex;flex-wrap:wrap;gap:4px;width:100%}.icon-btn{border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;padding:2px 6px}.exercise-row{display:grid;grid-template-columns:repeat(4,minmax(120px,1fr));gap:6px;margin-bottom:6px}.workout-editor{overflow-x:auto}.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(140px,1fr));gap:12px;margin-bottom:14px}.stat-card{display:grid;gap:6px}.stat-label{color:var(--muted);font-size:.85rem}.stat-value{font-size:1.6rem;font-weight:700}.email-archive-grid{grid-template-columns:minmax(320px,420px) 1fr}.email-list-item{display:grid;gap:4px}.email-list-subject{font-weight:700;color:var(--text)}.email-stat-grid{grid-template-columns:repeat(2,minmax(140px,1fr))}.email-html-preview{border:1px solid var(--border);border-radius:10px;background:#fff;min-height:360px;overflow:hidden}.email-html-preview iframe{width:100%;min-height:560px;border:0;background:#fff}.email-text-preview{margin:0;border:1px solid var(--border);border-radius:10px;background:#f9fbfd;padding:12px;font:.88rem/1.45 SF Mono,Menlo,monospace;white-space:pre-wrap;word-break:break-word;max-height:560px;overflow-y:auto}@media(max-width:1200px){.admin-shell{grid-template-columns:1fr}.sidebar{gap:10px}.nav{flex-direction:row;overflow-x:auto}.grid-two,.email-archive-grid{grid-template-columns:1fr}.schedule-grid{grid-template-columns:repeat(2,minmax(140px,1fr))}.exercise-row{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,minmax(140px,1fr))}.email-stat-grid{grid-template-columns:1fr}}