:root{--primary:#5D8A82;--primary-dark:#4A6D67;--instructor:#FFB74D;--mat-color:#8FB3B3;--mat-head:#555555;--bg:#F5F7F5;--card:#FFFFFF;--text:#333333;--radius:12px;--shadow:0 4px 12px rgba(0,0,0,0.08);--danger:#E57373;--accent:#C86B4E;--bizum:#E4002B;--bizum-dark:#B80023;--success:#4CAF50}
*{box-sizing:border-box;margin:0;padding:0;font-family:'Segoe UI',system-ui,sans-serif}
body{background:var(--bg);color:var(--text);line-height:1.5;padding:20px}
.container{max-width:1100px;margin:0 auto}
header{text-align:center;margin-bottom:30px;padding:20px 0;border-bottom:2px solid var(--primary)}
.logo{max-width:150px;height:auto;margin-bottom:15px;cursor:pointer}
h1{color:var(--primary);margin-bottom:8px;font-size:2em}
header p{color:#666}
.card{background:var(--card);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px}
label{display:block;margin-bottom:8px;font-weight:600;color:var(--text);font-size:.92rem}
select,input[type="datetime-local"],input[type="text"],input[type="number"],input[type="password"],input[type="email"]{width:100%;padding:12px;margin-bottom:20px;border:2px solid #ddd;border-radius:8px;font-size:15px;background:white;font-family:inherit}
select:focus,input:focus{outline:none;border-color:var(--primary)}
.classes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-bottom:30px}
.class-card{background:white;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:all .3s;border:3px solid transparent}
.class-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.class-card.selected{border-color:var(--primary);transform:scale(1.02)}
.class-card img{width:100%;height:200px;object-fit:cover}
.class-card-body{padding:20px}
.class-card-title{font-size:1.3em;font-weight:bold;color:var(--primary);margin-bottom:8px}
.class-card-meta{display:flex;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.class-card-desc{color:#666;font-size:.95em;line-height:1.5}
.tag{display:inline-block;padding:4px 12px;border-radius:20px;font-size:.85em;font-weight:600}
.tag-principiante{background:#C8E6C9;color:#2E7D32}
.tag-intermedio{background:#FFF9C4;color:#F57F17}
.tag-todos{background:#BBDEFB;color:#1565C0}
.tag-avanzado{background:#FFCDD2;color:#C62828}
.tag-prenatal{background:#F8BBD9;color:#C2185B}
.price-display{font-size:1.5em;font-weight:bold;color:var(--primary);text-align:right;margin:20px 0}
.grid-toggle{display:flex;gap:10px;margin-bottom:20px}
.grid-toggle button{flex:1;padding:12px;border:2px solid var(--primary);background:transparent;cursor:pointer;border-radius:8px;font-weight:600;transition:all .2s;font-family:inherit;font-size:.95rem}
.grid-toggle button.active{background:var(--primary);color:white}
.grid-toggle button:hover:not(.active){background:rgba(93,138,130,.1)}
.room-section{display:none!important;margin-top:30px}
.room-section.active{display:block!important}
.room-wrapper{position:relative;width:100%;max-width:900px;margin:0 auto;aspect-ratio:4/3;background:#F4F1EA;border-radius:12px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.15);border:4px solid #444}
.room-bg{width:100%;height:100%;object-fit:contain;display:block;background:#F4F1EA}
.room-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}
.mat-btn{position:absolute;width:39px;height:87px;display:flex;align-items:center;justify-content:center;font-weight:bold;font-size:13px;color:white;cursor:pointer;pointer-events:auto;border-radius:6px;transition:all .25s;border:none;text-shadow:0 1px 3px rgba(0,0,0,.5);box-shadow:0 2px 6px rgba(0,0,0,.3);overflow:hidden;transform:translate(-50%,-50%)}
.mat-btn.available{background:rgba(143,179,179,.95)}
.mat-btn.available:hover{background:rgba(143,179,179,1);transform:translate(-50%,-50%) scale(1.15);box-shadow:0 4px 12px rgba(0,0,0,.4);z-index:20}
.mat-btn.selected{background:rgba(143,179,179,1);border:3px solid var(--primary-dark);box-shadow:0 0 0 5px rgba(93,138,130,.6);transform:translate(-50%,-50%) scale(1.15);z-index:20}
.mat-btn.reserved{background:rgba(208,208,208,.85);color:#888;cursor:not-allowed}
.mat-btn::before{content:'';position:absolute;top:0;left:0;right:0;height:25%;background:var(--mat-head);border-radius:6px 6px 0 0;opacity:.9}
.instructor-btn{position:absolute;background:var(--instructor);color:white;font-weight:bold;font-size:13px;border-radius:6px;display:flex;align-items:center;justify-content:center;box-shadow:0 3px 10px rgba(0,0,0,.2);pointer-events:none;z-index:5}
.actions{display:flex;gap:15px;margin-top:25px;justify-content:center;flex-wrap:wrap}
.btn{padding:14px 30px;border:none;border-radius:8px;cursor:pointer;font-weight:600;font-size:15px;transition:.2s;font-family:inherit}
.btn-primary{background:var(--primary);color:white}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,.2)}
.btn-primary:disabled{background:#ccc;cursor:not-allowed;transform:none}
.btn-secondary{background:#e0e0e0;color:var(--text)}
.btn-secondary:hover{background:#d0d0d0}
.btn-danger{background:var(--danger);color:white}
.btn-danger:hover{background:#d32f2f}
.btn-bizum{background:var(--bizum);color:white}
.btn-bizum:hover{background:var(--bizum-dark);transform:translateY(-2px)}
.btn-bizum:disabled{background:#ccc;cursor:not-allowed;transform:none}
#selectionMsg{text-align:center;color:#666;margin-top:15px;font-style:italic;font-size:1.1em;padding:10px;background:#f0f7f6;border-radius:8px}
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.6);display:none;align-items:center;justify-content:center;z-index:100;backdrop-filter:blur(3px)}
.modal-overlay.open{display:flex}
.modal-content{background:white;padding:30px;border-radius:var(--radius);max-width:500px;width:90%;box-shadow:0 10px 40px rgba(0,0,0,.3);max-height:90vh;overflow-y:auto}
.modal-content h3{color:var(--primary);margin-bottom:20px;font-size:1.5em}
.summary-row{display:flex;justify-content:space-between;margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid #eee}
.summary-row.total{font-size:1.2em;font-weight:bold;color:var(--primary);border-bottom:none;margin-top:10px}
.qr-container{margin:20px 0;text-align:center}
.qr-container img{border-radius:8px;border:2px solid #eee}
.bizum-section{margin-top:20px;padding-top:20px;border-top:2px solid #eee}
.bizum-logo{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:15px}
.bizum-logo-circle{width:48px;height:48px;border-radius:50%;background:var(--bizum);display:flex;align-items:center;justify-content:center;color:white;font-size:1.3rem;box-shadow:0 3px 12px rgba(228,0,43,.25)}
.bizum-logo-text{font-size:1.6em;font-weight:800;color:var(--bizum);letter-spacing:-.5px}
.bizum-code-box{background:linear-gradient(135deg,#fef2f2,#fff5f5);border:2px dashed var(--bizum);border-radius:12px;padding:16px;text-align:center;margin:15px 0}
.bizum-code-label{font-size:.8rem;color:#888;text-transform:uppercase;letter-spacing:1px;margin-bottom:6px}
.bizum-code-value{font-size:1.6em;font-weight:800;color:var(--bizum);letter-spacing:3px;font-family:'Courier New',monospace}
.bizum-amount{font-size:1.8em;font-weight:800;color:var(--bizum);margin:10px 0}
.bizum-steps{text-align:left;margin:15px 0;padding:0;list-style:none}
.bizum-steps li{padding:8px 0 8px 32px;position:relative;font-size:.9rem;color:#555;border-bottom:1px solid #f0f0f0}
.bizum-steps li:last-child{border-bottom:none}
.bizum-steps li::before{content:attr(data-step);position:absolute;left:0;top:8px;width:22px;height:22px;border-radius:50%;background:var(--bizum);color:white;font-size:.7rem;font-weight:700;display:flex;align-items:center;justify-content:center}
.bizum-copy-btn{background:none;border:1.5px solid var(--bizum);color:var(--bizum);padding:6px 14px;border-radius:6px;cursor:pointer;font-size:.82rem;font-weight:600;transition:all .2s;font-family:inherit}
.bizum-copy-btn:hover{background:var(--bizum);color:white}
.bizum-confirm-check{display:flex;align-items:flex-start;gap:10px;margin:15px 0;font-size:.9rem;cursor:pointer}
.bizum-confirm-check input[type="checkbox"]{width:20px;height:20px;accent-color:var(--bizum);margin-top:2px;cursor:pointer}
.confirm-code{font-size:1.8em;font-weight:700;color:var(--primary);letter-spacing:2px;text-align:center;margin:15px 0;padding:10px;background:#f0f7f6;border-radius:8px}
.email-sent-box{background:#f0f7f6;border-radius:12px;padding:16px;margin:15px 0}
.email-sent-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid #e0ece8;font-size:.88rem}
.email-sent-row:last-child{border-bottom:none}
.email-sent-row i{color:var(--primary);font-size:1rem;width:20px;text-align:center}
.email-sent-row a{color:var(--primary-dark);text-decoration:underline;word-break:break-all}
.admin-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:300;display:none}
.admin-overlay.open{display:block}
.admin-panel{position:fixed;top:0;right:-520px;width:500px;max-width:92vw;height:100vh;background:var(--card);z-index:310;transition:right .4s cubic-bezier(.16,1,.3,1);box-shadow:-6px 0 30px rgba(0,0,0,.15);overflow-y:auto;padding:0}
.admin-panel.open{right:0}
.admin-header{padding:20px 24px;border-bottom:2px solid var(--primary);display:flex;justify-content:space-between;align-items:center;background:#f0f7f6;position:sticky;top:0;z-index:5}
.admin-header h2{color:var(--primary);font-size:1.3em}
.admin-close{background:none;border:none;cursor:pointer;font-size:1.3rem;color:#666}
.admin-body{padding:24px}
.admin-tabs{display:flex;gap:0;margin-bottom:20px;border-bottom:2px solid #eee}
.admin-tab{flex:1;padding:10px 16px;background:none;border:none;cursor:pointer;font-weight:600;font-size:.9rem;color:#888;border-bottom:3px solid transparent;transition:all .2s;font-family:inherit}
.admin-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.admin-tab:hover{color:var(--primary-dark)}
.admin-tab-content{display:none}
.admin-tab-content.active{display:block}
.admin-table{width:100%;border-collapse:collapse;font-size:.82rem;margin-top:8px}
.admin-table th{background:rgba(93,138,130,.08);padding:8px;text-align:left;font-weight:600}
.admin-table td{padding:8px;border-bottom:1px solid #eee}
.admin-table tr:hover td{background:#fafafa}
.price-row{display:flex;align-items:center;justify-content:space-between;padding:8px;border-radius:6px;background:#fafafa;margin-bottom:6px}
.price-input{width:65px;padding:4px 8px;border:1px solid #ddd;border-radius:6px;font-size:.85rem;text-align:right;font-family:inherit}
.pos-grid{display:grid;grid-template-columns:auto 1fr 1fr;gap:4px;font-size:.78rem;align-items:center}
.pos-grid input{width:100%;padding:3px 6px;border:1px solid #ddd;border-radius:4px;font-size:.78rem;font-family:inherit;margin:0}
.login-modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;z-index:400;backdrop-filter:blur(3px)}
.login-modal.open{display:flex}
.login-box{background:white;padding:30px;border-radius:var(--radius);width:320px;max-width:90%;box-shadow:0 10px 40px rgba(0,0,0,.3);text-align:center}
.login-box h3{color:var(--primary);margin-bottom:20px}
.login-error{color:var(--danger);font-size:.85rem;margin-bottom:10px;display:none}
.login-error.visible{display:block}
.hidden{display:none!important}
@keyframes toastIn{from{opacity:0;transform:translateX(100px)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0;transform:translateX(100px)}}
.spinner-sm{width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:768px){
  .grid-toggle{flex-direction:column}.actions{flex-direction:column}.btn{width:100%}
  .classes-grid{grid-template-columns:1fr}.logo{max-width:100px}
  .room-wrapper{max-width:100%;aspect-ratio:1/1.2}.mat-btn{font-size:11px!important}
  .admin-panel{width:100%;max-width:100vw}
  .bizum-code-value{font-size:1.2em;letter-spacing:2px}
}