:root{--bg-color: #f4f6fa;--card-bg: #ffffff;--text-main: #222222;--text-hint: #8a8d93;--accent-color: #2481cc;--accent-light: rgba(36, 129, 204, .1);--empty-color: #8fa0af;--border-radius-card: 14px;--safe-area-top: env(safe-area-inset-top, 0px)}html{scroll-behavior:smooth}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-color);color:var(--text-main);-webkit-tap-highlight-color:transparent;overflow-x:hidden}.app-container{display:flex;flex-direction:column;min-height:100vh}.header{position:sticky;top:0;z-index:100;background:var(--card-bg);box-shadow:0 4px 12px #0000000d;padding:calc(10px + var(--safe-area-top)) 15px 12px 15px;display:flex;flex-direction:column;gap:8px}.group-badge{font-size:.85rem;font-weight:700;color:var(--accent-color);background:var(--accent-light);align-self:flex-start;padding:4px 10px;border-radius:20px;letter-spacing:.5px}.calendar-strip{display:flex;justify-content:space-between;gap:8px}.calendar-day{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px 4px;border-radius:10px;cursor:pointer;background:var(--bg-color);transition:all .2s cubic-bezier(.4,0,.2,1)}.calendar-day.active{background:var(--accent-color);color:#fff;transform:scale(1.05)}.day-label{font-size:.9rem;font-weight:600}.schedule-list{padding:15px;display:flex;flex-direction:column;gap:20px}.day-section{scroll-margin-top:calc(110px + var(--safe-area-top))}.day-title{font-size:1.15rem;font-weight:700;margin:0 0 10px 4px;color:var(--text-main);border-left:3px solid var(--accent-color);padding-left:8px}.lesson-card{background:var(--card-bg);border-radius:var(--border-radius-card);padding:14px;margin-bottom:10px;box-shadow:0 2px 8px #00000008;display:flex;flex-direction:column;gap:6px;border:1px solid rgba(0,0,0,.02)}.lesson-header{display:flex;justify-content:space-between;align-items:center}.lesson-time{font-size:.8rem;font-weight:600;color:var(--accent-color);background-color:var(--accent-light);padding:2px 6px;border-radius:6px}.lesson-type{font-size:.75rem;color:var(--text-hint);text-transform:uppercase;font-weight:700;letter-spacing:.5px}.lesson-subject{font-weight:700;font-size:1.05rem;line-height:1.3}.lesson-info{font-size:.85rem;color:var(--text-hint);display:flex;justify-content:space-between;margin-top:4px}.room{font-weight:700;color:var(--text-main)}.empty-lessons{background:#00000004;border:1px dashed rgba(0,0,0,.08);color:var(--empty-color);text-align:center;padding:20px;border-radius:var(--border-radius-card);font-size:.9rem;font-style:italic}.loader-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;gap:15px;color:var(--text-hint)}.loader{border:3px solid var(--bg-color);border-top:3px solid var(--accent-color);border-radius:50%;width:35px;height:35px;animation:spin .8s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-icon{width:48px;height:48px;border-radius:50%;background:#e74c3c;color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700}.error-message{color:var(--text-hint);font-size:.9rem;max-width:280px;text-align:center}.retry-button{margin-top:12px;padding:10px 28px;background:var(--accent-color);color:#fff;border:none;border-radius:10px;font-size:.95rem;font-weight:600;cursor:pointer;transition:opacity .2s}.retry-button:active{opacity:.7}.additional-info{padding:15px;margin-top:5px;background:var(--card-bg);border-radius:var(--border-radius-card);border:1px solid rgba(0,0,0,.04)}.info-item{margin:0 0 8px;font-size:.85rem;color:var(--text-hint);line-height:1.4}.info-item:last-child{margin-bottom:0}.picker-overlay{position:fixed;inset:0;z-index:200;background:#0006;display:flex;align-items:flex-end;justify-content:center;padding:20px}.picker-card{background:var(--card-bg);border-radius:18px 18px 0 0;width:100%;max-width:420px;max-height:80vh;display:flex;flex-direction:column;padding:20px 16px 24px;gap:16px}.picker-title{font-size:1.1rem;font-weight:700;margin:0;text-align:center;color:var(--text-main)}.course-tabs{display:flex;gap:10px;justify-content:center}.course-tab{padding:8px 20px;border-radius:10px;font-size:.9rem;font-weight:600;cursor:pointer;background:var(--bg-color);color:var(--text-hint);transition:all .15s}.course-tab.active{background:var(--accent-color);color:#fff}.group-list{display:flex;flex-wrap:wrap;gap:8px;overflow-y:auto;max-height:50vh}.group-option{flex:0 0 calc(33.333% - 6px);display:flex;flex-direction:column;align-items:center;padding:12px 8px;border-radius:12px;cursor:pointer;background:var(--bg-color);transition:background .15s}.group-option:active{background:var(--accent-light)}.group-id{font-weight:700;font-size:.95rem;color:var(--text-main)}.group-course{font-size:.7rem;color:var(--text-hint);margin-top:2px}.picker-close{padding:12px;background:var(--bg-color);border:none;border-radius:12px;font-size:.9rem;font-weight:600;color:var(--text-hint);cursor:pointer}.group-badge{cursor:pointer;user-select:none}