/* ==========================================================
   CSS VARIABLES
========================================================== */

:root {
    /* Colors */
    --primary: #0d6efd;
    --secondary: #6c757d;
    --success: #198754;
    --warning: #ffc107;
    --danger: #dc3545;

    --background: #ffffff;
    --surface: #ffffff;

    --text: #222;
    --text-light: #666;

    --border: #dddddd;

    /* Fonts */
    --font-family: "Segoe UI", Arial, Helvetica, sans-serif;

    /* Sizes */
    --max-width: 1200px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;

    /* Effects */
    --radius: 6px;
    --shadow: 0 2px 8px rgba(0,0,0,.08);
}


/* ==========================================================
   RESET - no default styles
========================================================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{

    height:100%;
    scroll-behavior:smooth;

}

body{

    min-height:100vh;

    display:flex;
    flex-direction:column;

    font-family:var(--font-family);
    font-size:16px;
    line-height:1.5;

    color:var(--text);
    background:var(--background);

}

/* ==========================================================
   TYPOGRAPHY
========================================================== */

h1,h2,h3,h4,h5,h6{
    margin-bottom:var(--space-md);
    font-weight:600;
}

p{
    margin-bottom:var(--space-md);
}

a{
    color:var(--primary);
    text-decoration:none;
}

a:hover{
    text-decoration:underline;
}

/* ==========================================================
   HEADER
========================================================== */

.header{
    height:70px;
    background:rgba(255,255,255,.75);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    display:flex;
    align-items:center;
    padding:0 20px;
    color:#111;
    border-bottom:1px solid rgba(0,0,0,.08);
    box-shadow:0 1px 4px rgba(0,0,0,.06);
}

.logo{
    height:84px;
    width:auto;
    margin-right:15px;
}

.header h1{
    margin:0;
    font-size:1.4rem;
    font-weight:600;
    color:#111;
}

.settings{
    height:20px;
    width:auto;
    filter:none;
    margin-left:auto;
    cursor:pointer;
    opacity:.6;
}

.settings:hover{
    opacity:1;
}

/* ==========================================================
   FOOTER
========================================================== */

.footer{
    background:#333;
    color:white;
    padding:8px 20px;
    text-align:center;
    font-size:0.9rem;
}

/* ==========================================================
   LAYOUT
========================================================== */

.container{
    max-width:var(--max-width);
    margin:auto;
    padding:var(--space-lg);
}

header,
footer{
    padding:var(--space-lg);
    box-shadow:var(--shadow);
}

main{
    margin:var(--space-xl) auto;
}
/* ==========================================================
   NAVIGATION BAR
========================================================== */

.navbar{
    display:flex;
    justify-content:flex-start;
    align-items:center;
    gap:0;
    height:40px;
    background:white;
    border-bottom:1px solid #dddddd;
}

.navbar a{
    display:flex;
    justify-content:center;
    align-items:center;
    height:100%;
    padding:0 18px;
    color:#000000;
    font-size:0.88rem;
    font-weight:500;
    text-decoration:none;
    border-right:1px solid #e8e8e8;
    transition:background-color .2s, color .2s;
}

.navbar a:hover{
    color:#f80101;
    background:#fafafa;
}
/* ==========================================================
   SIDEBAR
========================================================== */

.app-layout{
    display:flex;
    flex:1;
}

.sidebar{
    flex:0 0 220px;
    background:#f3f2f1;
    padding:14px 16px;
    border-right:1px solid #dddddd;
}

.sidebar-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:10px;
}

.sidebar-header h3{
    margin-bottom:0;
    font-size:0.95rem;
}

.btn-clear-filters{
    padding:2px 10px;
    font-size:0.75rem;
    font-weight:600;
    color:#666;
    background:#e8e8e8;
    border:1px solid #ccc;
    border-radius:4px;
    cursor:pointer;
    transition:background .2s, color .2s, border-color .2s;
}

.btn-clear-filters:hover{
    background:white;
    color:#f80101;
    border-color:#f80101;
}

.sidebar h3{
    margin-bottom:10px;
    font-size:0.95rem;
}

.sidebar input[type="search"]{
    padding:6px 8px;
    font-size:0.88rem;
}

.filter-group{
    margin-bottom:10px;
}

.filter-group label{
    display:block;
    margin-bottom:3px;
    font-size:0.82rem;
    font-weight:600;
}

.filter-group select{
    width:100%;
    padding:6px 8px;
    font-size:0.88rem;
}

.filter-year-range{
    display:flex;
    align-items:center;
    gap:6px;
}

.filter-year-range select{
    width:0;
    flex:1;
    padding:6px 8px;
    font-size:0.88rem;
}

.filter-year-sep{
    color:#666666;
    flex:0 0 auto;
}

.container{
    flex:1;
    padding:24px;
}
.filter-row{
    display:flex;
    gap:10px;
}

.filter-row .filter-group{
    flex:1;
}
/* ==========================================================
   BUTTONS
========================================================== */

button{
    cursor:pointer;
    border:none;
    padding:10px 18px;
    border-radius:var(--radius);
    background:var(--primary);
    color:white;
    transition:.2s;
}

button:hover{
    opacity:.9;
}


/* ==========================================================
   FORMS
========================================================== */

input,
select,
textarea{

    width:100%;
    padding:10px;
    border:1px solid var(--border);
    border-radius:var(--radius);
    font-size:1rem;
}

label{
    display:block;
    margin-bottom:6px;
    font-weight:bold;
}


/* ==========================================================
   CARDS
========================================================== */

.card{

    background:var(--surface);
    padding:var(--space-lg);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    margin-bottom:var(--space-lg);
}


/* ==========================================================
   TABLES
========================================================== */

#csv-container{
    display:flex;
    justify-content:center;
    margin:40px auto;
}

#csv-container table{
    border-collapse:collapse;
    background:white;
    width:auto;
    min-width:600px;
}

#csv-container th,
#csv-container td{
    border:1px solid #ccc;
    padding:8px 12px;
    text-align:left;
}

#csv-container th{
    background:#f0f0f0;
}

/* Estilo general para el resto de tablas */
table{
    width:100%;
    border-collapse:collapse;
}

th,
td{
    padding:12px;
    border:1px solid var(--border);
}

th{
    background:#efefef;
}

/* ==========================================================
   UTILITIES
========================================================== */

.text-center{
    text-align:center;
}

.text-right{
    text-align:right;
}

.hidden{
    display:none;
}

.mt{
    margin-top:var(--space-lg);
}

.mb{
    margin-bottom:var(--space-lg);
}

.flex{
    display:flex;
}

.flex-between{
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.gap{
    gap:var(--space-md);
}
/* ==========================================================
   LESSONS DASHBOARD
========================================================== */

.results-header{
    display:flex;
    justify-content:space-between;
    align-items:baseline;
    margin-bottom:var(--space-md);
}

#results-count{
    color:var(--text-light);
    font-size:0.9rem;
    white-space:nowrap;
}

.lesson-card{
    background:var(--surface);
    border:1px solid var(--border);
    border-left:4px solid #f80101;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:var(--space-lg);
    margin-bottom:var(--space-lg);
}

.lesson-card h3{
    margin-bottom:var(--space-sm);
    font-size:1.1rem;
}

.chips{
    display:flex;
    flex-wrap:wrap;
    gap:var(--space-xs);
    margin-bottom:var(--space-md);
}

.chip{
    background:#f3f2f1;
    border:1px solid var(--border);
    border-radius:12px;
    padding:2px 10px;
    font-size:0.78rem;
    color:var(--text-light);
    white-space:nowrap;
}

.lesson-section{
    margin-bottom:var(--space-sm);
}

.lesson-section h4{
    font-size:0.8rem;
    text-transform:uppercase;
    letter-spacing:.04em;
    color:var(--text-light);
    margin-bottom:2px;
}

.lesson-section p{
    margin-bottom:var(--space-sm);
}

.lesson-section.highlight{
    background:#fff7f7;
    border-left:3px solid #f80101;
    padding:var(--space-sm) var(--space-md);
    border-radius:0 var(--radius) var(--radius) 0;
}

.lesson-card details{
    margin:var(--space-sm) 0;
}

.lesson-card summary{
    cursor:pointer;
    font-size:0.85rem;
    color:var(--primary);
}

.lesson-meta{
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(220px, 1fr));
    gap:var(--space-sm) var(--space-lg);
    margin-top:var(--space-sm);
    font-size:0.88rem;
}

.lesson-meta dt{
    font-weight:600;
    color:var(--text-light);
    font-size:0.75rem;
    text-transform:uppercase;
    letter-spacing:.04em;
}

.lesson-meta dd{
    margin:0;
}

.lesson-footer{
    border-top:1px solid var(--border);
    padding-top:var(--space-sm);
    font-size:0.82rem;
    color:var(--text-light);
}

.no-results{
    color:var(--text-light);
    font-style:italic;
}

.error-box{
    background:#fff3f3;
    border:1px solid var(--danger);
    border-radius:var(--radius);
    padding:var(--space-md);
    color:var(--danger);
}

#clear-filters{
    width:100%;
    margin-top:var(--space-sm);
    background:#6c757d;
}

@media (max-width: 760px){
    .app-layout{ flex-direction:column; }
    .sidebar{ flex:none; border-right:none; border-bottom:1px solid var(--border); }
}

/* ==========================================================
   ACCESS GATE OVERLAY
========================================================== */

#gate-overlay{
    position:fixed;
    inset:0;
    z-index:9999;
    background:#f80101;
    display:flex;
    align-items:center;
    justify-content:center;
}

#gate-overlay.hidden{
    display:none;
}

.gate-box{
    background:white;
    border-radius:12px;
    padding:40px 48px;
    width:100%;
    max-width:420px;
    box-shadow:0 8px 32px rgba(0,0,0,.25);
    text-align:center;
}

.gate-logo{
    height:52px;
    width:auto;
    margin-bottom:20px;
}

.gate-box h2{
    font-size:1.4rem;
    margin-bottom:4px;
}

.gate-subtitle{
    color:var(--text-light);
    font-size:0.9rem;
    margin-bottom:24px;
}

.gate-label{
    display:block;
    text-align:left;
    font-size:0.85rem;
    font-weight:600;
    margin-bottom:6px;
}

#gate-form input[type="password"]{
    margin-bottom:12px;
}

#gate-form button{
    width:100%;
    padding:12px;
    font-size:1rem;
    background:#f80101;
}

.gate-error{
    color:var(--danger);
    font-size:0.88rem;
    margin-top:10px;
}

/* ==========================================================
   TOOLBAR
========================================================== */

.toolbar{
    display:flex;
    align-items:center;
    justify-content:flex-start;
    gap:var(--space-sm);
    padding:8px 20px;
    background:#fafafa;
    border-bottom:1px solid var(--border);
    flex-wrap:wrap;
}

.toolbar-left{
    display:flex;
    align-items:center;
    gap:8px;
    flex-wrap:wrap;
}

.toolbar button{
    padding:7px 14px;
    font-size:0.88rem;
    border-radius:var(--radius);
    white-space:nowrap;
}

.btn-secondary{
    background:white;
    color:var(--text);
    border:1px solid var(--border) !important;
    transition:background .2s, color .2s, border-color .2s;
}

.btn-secondary:hover{
    background:white;
    color:#f80101;
    border-color:#f80101 !important;
    opacity:1;
}

.toolbar-info{
    font-size:0.82rem;
    color:var(--text-light);
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
    max-width:260px;
}

/* ==========================================================
   VALIDATION BANNER
========================================================== */

.val-banner{
    border-radius:var(--radius);
    padding:10px 14px;
    margin-bottom:var(--space-md);
    font-size:0.88rem;
    position:relative;
}

.val-error{
    background:#fff3f3;
    border:1px solid var(--danger);
    color:var(--danger);
}

.val-warn{
    background:#fff8e1;
    border:1px solid #e6a800;
    color:#7a5600;
}

.val-info{
    background:#f0fff4;
    border:1px solid #198754;
    color:#145229;
}

.val-summary{
    display:flex;
    align-items:center;
    gap:var(--space-sm);
    flex-wrap:wrap;
}

.val-close{
    margin-left:auto;
    background:transparent;
    color:inherit;
    border:none;
    font-size:1.1rem;
    padding:0 4px;
    line-height:1;
    cursor:pointer;
    opacity:.7;
}

.val-close:hover{
    opacity:1;
}

.val-details{
    margin-top:8px;
    font-size:0.83rem;
}

.val-details summary{
    cursor:pointer;
    font-weight:600;
    margin-bottom:4px;
}

.val-details ul{
    padding-left:20px;
    margin:4px 0;
}

.val-details li{
    margin-bottom:3px;
    line-height:1.4;
}

/* ==========================================================
   ADD LESSON MODAL
========================================================== */

#add-lesson-overlay{
    position:fixed;
    inset:0;
    z-index:9998;
    background:rgba(0,0,0,.5);
    display:flex;
    align-items:center;
    justify-content:center;
    padding:var(--space-lg);
}

#add-lesson-overlay.hidden{
    display:none;
}

body.modal-open{
    overflow:hidden;
}

.add-lesson-modal{
    background:white;
    border-radius:12px;
    width:100%;
    max-width:740px;
    max-height:90vh;
    overflow-y:auto;
    box-shadow:0 8px 32px rgba(0,0,0,.25);
}

.modal-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:24px 28px 0;
}

.modal-header h2{
    margin:0;
    font-size:1.3rem;
}

.modal-close{
    background:transparent;
    color:var(--text-light);
    border:none;
    font-size:1.6rem;
    padding:0 4px;
    line-height:1;
    cursor:pointer;
}

.modal-close:hover{
    color:var(--text);
    opacity:1;
}

#add-lesson-form{
    padding:20px 28px 28px;
}

.form-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:14px 20px;
}

.form-group{
    display:flex;
    flex-direction:column;
}

.form-group.full-width{
    grid-column:1 / -1;
}

.form-group label{
    font-size:0.85rem;
    font-weight:600;
    margin-bottom:4px;
}

.form-group .required-mark{
    color:var(--danger);
    margin-left:2px;
}

.form-group input,
.form-group select,
.form-group textarea{
    padding:8px 10px;
    font-size:0.92rem;
}

.form-group textarea{
    resize:vertical;
    min-height:72px;
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea{
    border-color:var(--danger);
}

.form-group .field-error-msg{
    color:var(--danger);
    font-size:0.78rem;
    margin-top:2px;
}

.form-actions{
    display:flex;
    gap:10px;
    justify-content:flex-end;
    margin-top:20px;
    padding-top:16px;
    border-top:1px solid var(--border);
}

.form-actions button{
    padding:10px 24px;
    font-size:0.95rem;
}

/* ==========================================================
   DELIVERABLE REGISTER
========================================================== */

#btn-generate{
    width:100%;
    margin-top:var(--space-sm);
}

#btn-generate:disabled,
.toolbar button:disabled,
.sidebar select:disabled{
    opacity:.5;
    cursor:not-allowed;
}

#register-count{
    color:var(--text-light);
    font-size:0.9rem;
    white-space:nowrap;
}

.ctx-line{
    display:flex;
    flex-wrap:wrap;
    gap:var(--space-xs) var(--space-lg);
    background:#f3f2f1;
    border:1px solid var(--border);
    border-left:4px solid #f80101;
    border-radius:var(--radius);
    padding:var(--space-sm) var(--space-md);
    margin-bottom:var(--space-md);
    font-size:0.9rem;
}

.register-search-group{
    max-width:340px;
    margin-bottom:var(--space-md);
}

.register-search-group label{
    font-size:0.9rem;
    font-weight:600;
}

.table-scroll{
    overflow-x:auto;
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
}

#register-table{
    width:100%;
    border-collapse:collapse;
    font-size:0.9rem;
    background:var(--surface);
}

#register-table th,
#register-table td{
    padding:9px 12px;
    border:1px solid var(--border);
    text-align:left;
    vertical-align:top;
}

#register-table thead th{
    background:#efefef;
    position:sticky;
    top:0;
    z-index:1;
}

#register-table th.sortable{
    cursor:pointer;
    user-select:none;
    white-space:nowrap;
}

#register-table th.sortable:hover{
    background:#e2e2e2;
}

#register-table tbody tr:nth-child(even){
    background:#fafafa;
}

#register-warnings .val-banner{
    margin-bottom:var(--space-md);
}

#register-warnings ul{
    padding-left:20px;
    margin:6px 0 0;
    font-size:0.85rem;
}

#register-warnings li{
    margin-bottom:4px;
    line-height:1.4;
}

#register-warnings summary{
    cursor:pointer;
    font-weight:600;
}

/* ==========================================================
   PRINT  — print the register itself (no popup window)
   Hides the app chrome and lays the table out full-width so the
   browser's own print preview works reliably.
========================================================== */

.print-only{ display:none; }

@media print{
    /* Hide everything that isn't the register */
    .header, .navbar, .toolbar, .sidebar, .footer,
    #status-banner, #register-warnings,
    .register-search-group, .results-header, #register-context{
        display:none !important;
    }

    html, body{ background:#fff; color:#000; }
    body{ display:block; font-size:11px; }
    .app-layout{ display:block; }
    .container{ max-width:none; margin:0; padding:0; flex:none; }

    /* Print-only title + context/meta line */
    .print-only{ display:block; }
    #print-header h1{ font-size:1.25rem; margin:0 0 4px; }
    #print-header .print-meta{
        font-size:0.8rem; color:#333;
        margin-bottom:12px; padding-bottom:8px;
        border-bottom:1px solid #999;
    }

    /* Table: full width, no scroll box, repeat header, avoid splitting rows */
    .table-scroll{ overflow:visible; border:none; box-shadow:none; border-radius:0; }
    #register-table{ font-size:10.5px; box-shadow:none; }
    #register-table thead{ display:table-header-group; }
    #register-table thead th{
        position:static;
        background:#e8e8e8 !important;
        -webkit-print-color-adjust:exact; print-color-adjust:exact;
    }
    #register-table tbody tr{ page-break-inside:avoid; }
    #register-table tbody tr:nth-child(even){
        background:#f4f4f4 !important;
        -webkit-print-color-adjust:exact; print-color-adjust:exact;
    }
    #register-table th, #register-table td{
        border:1px solid #999; padding:4px 7px;
    }

    @page{ margin:14mm; }
}

@media (max-width: 600px){
    .form-grid{
        grid-template-columns:1fr;
    }
    .add-lesson-modal{
        max-height:95vh;
    }
    #add-lesson-form{
        padding:16px 18px 20px;
    }
    .modal-header{
        padding:18px 18px 0;
    }
}