:root{--bg: #faf8f5;--surface: #f0eae1;--card: #ffffff;--border: #ddd4c6;--list-item-bg: #ffffff;--accent: #c97248;--accent2: #7c6fcd;--text: #0f0e0c;--muted: #6b6158;--booked-bg: #edeae6;--booked-t: #9a9490;--booked-ext-bg: #b5afa5;--booked-ext-t: #ffffff;--cart-bg: #f0fbf5;--cart-t: #3a7d58;--err-t: #b44040;--warn-t: #8a5e1a;--sat: #1976d2;--sun: #e53935;--radius: 12px;--font: "Zen Kaku Gothic New", sans-serif;--mono: "DM Mono", monospace}*{box-sizing:border-box;margin:0;padding:0}html{scrollbar-gutter:stable}body{background:var(--bg);color:var(--text);font-family:var(--font);min-height:100vh}#root{max-width:680px;margin:0 auto;padding:24px 16px 220px}.header{text-align:center;margin-bottom:20px}.header h1{font-size:1.5rem;font-weight:700;color:var(--accent);margin-bottom:6px}.header p{color:var(--muted);font-size:.85rem}.card-title{font-size:.85rem;font-weight:700;letter-spacing:.08em;color:var(--accent2);margin-bottom:10px}.sub-title{font-size:.8rem;font-weight:700;color:var(--accent2);margin-bottom:8px}.section-label{font-size:.72rem;font-weight:700;letter-spacing:.06em;color:var(--muted);margin-bottom:6px}.login-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:20px}.login-btn{flex-shrink:0;min-width:90px;padding:0 16px;height:48px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-family:var(--font);font-weight:700;font-size:.9rem;cursor:pointer;display:flex;align-items:center;justify-content:center;width:100%}.login-btn:disabled{opacity:.7}.login-hint{margin-top:12px;text-align:center;font-size:.8rem;color:var(--muted)}.login-hint a{color:var(--accent);text-decoration:none;cursor:pointer;border-bottom:1px solid transparent}.welcome-bar{display:flex;align-items:center;justify-content:space-between;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;margin-bottom:16px}.welcome-name{font-size:.95rem;font-weight:500}.welcome-name .label{font-size:.72rem;color:var(--muted);margin-right:6px}.logout-link{font-size:.78rem;color:var(--muted);cursor:pointer;border:none;background:none;font-family:var(--font);text-decoration:underline}.alert{padding:11px 14px;border-radius:8px;font-size:.83rem;line-height:1.5;margin-top:10px}.alert.err{background:#b4404014;color:var(--err-t);border:1px solid rgba(180,64,64,.25)}.alert.warn{background:#8a5e1a14;color:var(--warn-t);border:1px solid rgba(138,94,26,.25)}.panel-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;overflow:hidden}.panel-header{display:flex;align-items:center;gap:10px;padding:13px 16px;cursor:pointer;-webkit-user-select:none;user-select:none}.panel-chevron{color:var(--muted);font-size:.85rem;transition:transform .2s}.panel-card.open .panel-chevron{transform:rotate(180deg)}.panel-body{display:none;padding:12px 14px 14px;border-top:1px solid var(--border)}.panel-card.open .panel-body{display:block}.booking-item{padding:12px;border:1px solid var(--border);border-radius:9px;margin-bottom:8px}.booking-item:last-child{margin-bottom:0}.booking-date-line{font-size:.95rem;font-weight:700;margin-bottom:2px}.booking-time-line{font-family:var(--mono);font-size:.85rem;color:var(--muted);margin-bottom:10px}.booking-actions{display:flex;gap:7px}.act-btn{padding:7px 14px;border-radius:7px;font-family:var(--font);font-size:.82rem;font-weight:700;cursor:pointer;min-width:68px;display:inline-flex;align-items:center;justify-content:center;border:none}.act-btn:disabled{opacity:.7;cursor:not-allowed}.act-change{background:var(--accent);color:#fff}.act-cancel{background:transparent;color:var(--err-t);border:1.5px solid var(--err-t)!important}.empty-bookings{text-align:center;padding:18px 0;color:var(--muted);font-size:.85rem}.change-panel,.cart-panel{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--card);border-top:1px solid var(--border);padding:12px 16px 18px;box-shadow:0 -4px 24px #0000001a;z-index:100}.change-panel.visible,.cart-panel.visible{display:block}.change-inner,.cart-inner{max-width:680px;margin:0 auto}.change-compare{margin-bottom:10px}.change-cmp-row{display:flex;align-items:center;gap:8px;padding:0 11px;border-radius:8px;margin-bottom:5px;height:44px;overflow:hidden}.change-cmp-row.before{background:var(--surface);border:1.5px solid transparent}.change-cmp-row.after{background:var(--surface);border:1.5px dashed var(--border)}.change-cmp-row.after.selected{background:#3a7d5812;border:1.5px solid var(--cart-t)}.change-cmp-tag{font-size:.82rem;font-weight:700;color:var(--muted);min-width:34px;flex-shrink:0}.change-cmp-tag.after{color:var(--accent)}.change-cmp-val{font-family:var(--mono);font-size:.83rem;color:var(--text);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.change-cmp-val.empty{color:var(--muted)}.cart-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.cart-items{margin-bottom:10px;max-height:100px;overflow-y:auto}.cart-item{display:flex;align-items:center;justify-content:space-between;padding:6px 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var(--border);border-radius:8px;font-family:var(--font);font-size:.92rem;font-weight:700;cursor:pointer;min-height:44px;display:flex;align-items:center;justify-content:center}.cart-cancel{display:block;text-align:center;margin-top:8px;font-size:.74rem;color:var(--muted);cursor:pointer}.interval-bar{display:flex;justify-content:center;margin-bottom:18px}.interval-toggle{display:flex;align-items:center;gap:8px;padding:8px 16px;background:var(--card);border:1.5px solid var(--border);border-radius:20px;font-family:var(--font);font-size:.8rem;color:var(--muted);cursor:pointer}.interval-toggle.active{border-color:var(--accent2);color:var(--accent2);background:#7c6fcd1a}.toggle-dot{width:8px;height:8px;border-radius:50%;background:var(--muted)}.interval-toggle.active .toggle-dot{background:var(--accent2)}.loading{text-align:center;padding:60px 0;color:var(--muted)}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s 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h2{font-size:1.05rem;margin-bottom:8px;text-align:center}.modal p{font-size:.85rem;color:var(--muted);margin-bottom:14px;line-height:1.6;text-align:center}.modal-btn{width:100%;padding:12px;border:none;border-radius:8px;font-family:var(--font);font-size:.9rem;font-weight:700;cursor:pointer;background:var(--accent);color:#fff}.modal-btn-row{display:flex;gap:10px;margin-top:14px}.modal-btn-row .modal-btn{flex:1;min-height:44px}.modal-btn.secondary{background:transparent;color:var(--muted);border:1.5px solid var(--border)}.modal-btn.danger{background:var(--err-t)}.form-group{margin-bottom:14px}.form-label{display:flex;align-items:baseline;gap:6px;font-size:.78rem;font-weight:700;color:var(--text);margin-bottom:6px}.form-label .req{color:var(--err-t);margin-left:1px}.field-err,.field-error-msg{font-size:.74rem;color:var(--err-t);font-weight:500}.form-select.has-error,.form-input.has-error{border-color:var(--err-t);background-color:#b440400a}.form-select{width:100%;min-height:44px;padding:11px 32px 11px 14px;background:var(--surface);border:1.5px solid var(--border);border-radius:8px;font-family:var(--font);font-size:.92rem;color:var(--text);outline:none;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='%236B6158' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}.form-select:focus,.form-input:focus,.form-textarea:focus{border-color:var(--accent)}.form-textarea{width:100%;padding:11px 14px;background:var(--surface);border:1.5px solid var(--border);border-radius:8px;font-family:var(--font);font-size:.92rem;color:var(--text);outline:none;resize:vertical;min-height:68px}.cancel-info-box{background:var(--surface);border-radius:8px;padding:10px 14px;margin-bottom:16px;font-size:.85rem;font-family:var(--mono);white-space:pre-line}.form-input{width:100%;min-height:44px;padding:11px 14px;background:var(--surface);border:1.5px solid var(--border);border-radius:8px;font-family:var(--font);font-size:.92rem;color:var(--text);outline:none}.password-wrap{position:relative}.password-wrap .form-input{padding-right:44px}.pw-eye{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;font-size:1.1rem;padding:6px 8px;line-height:1;color:var(--muted);border-radius:6px}body.suspended .dur-btn{background:var(--booked-bg)!important;border-color:#c8c3be!important;color:var(--booked-t)!important;cursor:not-allowed!important;opacity:.7;pointer-events:none}body.suspended .submit-btn{opacity:.5;cursor:not-allowed;pointer-events:none}body.suspended .interval-toggle{opacity:.5;pointer-events:none}.tabs{display:flex;gap:4px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:5px;margin-bottom:16px;overflow-x:auto}.tab-btn{flex:1;min-width:80px;padding:9px 6px;background:transparent;border:none;border-radius:8px;font-family:var(--font);font-size:.82rem;font-weight:500;color:var(--muted);cursor:pointer;white-space:nowrap}.tab-btn.active{background:var(--accent);color:#fff;font-weight:700}.tab-panel{display:none}.tab-panel.active{display:block}.cal-mini-nav{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.cal-title{font-size:.95rem;font-weight:700;color:var(--text);font-family:var(--mono)}.cal-nav-btn{padding:6px 14px;background:var(--surface);border:1.5px solid var(--border);border-radius:7px;font-size:1rem;cursor:pointer;color:var(--text);font-family:var(--font)}.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:3px}.cal-wd{text-align:center;font-size:.7rem;color:var(--muted);padding:4px 0;font-weight:700}.cal-wd.sat{color:var(--sat)}.cal-wd.sun{color:var(--sun)}.cal-cell{aspect-ratio:1;display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;border:1.5px solid var(--border);border-radius:6px;font-size:.75rem;font-family:var(--mono);background:var(--bg);position:relative;padding:3px 3px 4px;overflow:hidden}.cal-cell.empty{background:none;border:none;min-height:0}.cal-cell.past{color:var(--booked-t);background:transparent;border-color:transparent;opacity:.45}.cal-cell.sun .cal-day-num{color:var(--sun)}.cal-cell.sat .cal-day-num{color:var(--sat)}.cal-day-num{font-size:.78rem;font-weight:700;font-family:var(--mono);line-height:1}.cal-rows{display:flex;flex-direction:column;gap:1px;margin-top:3px;flex:1;overflow:hidden}.cal-row{font-family:var(--font);font-size:.66rem;font-weight:700;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cal-row-time{display:block;font-family:var(--mono);font-size:.58rem;font-weight:500;opacity:.95}.cal-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px;margin-bottom:16px}@media (max-width: 600px){.cal-card{margin-left:-16px;margin-right:-16px;border-radius:0;border-left:0;border-right:0;padding-left:6px;padding-right:6px}.cal-card .cal-grid{gap:0}.cal-card .cal-cell{border-radius:0;aspect-ratio:auto;min-height:64px}}.cal-legend{display:flex;gap:10px;margin-top:12px;font-size:.7rem;color:var(--muted);justify-content:center;flex-wrap:wrap}.cal-legend-item{display:inline-flex;align-items:center;gap:5px}.cal-legend-swatch{display:inline-block;width:12px;height:12px;border-radius:3px}.lesson-days-empty{text-align:center;padding:32px 0;color:var(--muted);font-size:.84rem;line-height:1.6}.course-list-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;background:var(--list-item-bg)}.course-list-stripe{flex-shrink:0;width:4px;align-self:stretch;border-radius:2px}.course-list-main{flex:1;min-width:0}.course-list-name{font-size:.92rem;font-weight:700;margin-bottom:2px}.course-list-meta{font-size:.74rem;color:var(--muted)}.course-sub-badge{display:inline-block;font-size:.66rem;font-weight:700;padding:2px 8px;border-radius:9px;background:#7c6fcd29;color:#5848b5;margin-left:6px;vertical-align:middle}.course-sub-note{font-size:.72rem;color:#5848b5;margin-top:3px;line-height:1.55}.course-add-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:11px;background:transparent;border:1.5px dashed var(--border);border-radius:8px;color:var(--accent);font-family:var(--font);font-size:.86rem;font-weight:700;cursor:pointer;text-decoration:none}.course-add-hint{margin-top:10px;padding:10px 12px;background:var(--surface);border-radius:8px;font-size:.74rem;color:var(--muted);line-height:1.6}