:root{
    --primary:#2B6CFF;
    --primary-dark:#1F4ED8;
    --primary-soft:#F3F7FF;
    --accent:#15C6D4;
    --text:#111827;
    --muted:#6B7280;
    --border:#E5E7EB;
    --bg:#ffffff;
    --bg2:#F7FAFF;
    --shadow: 0 20px 50px rgba(17,24,39,.08);
    --shadow2: 0 12px 28px rgba(17,24,39,.06);
    --radius:16px;
}

*{ box-sizing:border-box; }
body{
    margin:0;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(to bottom, var(--bg2), #fff);
    color: var(--text);
}

a{ color:inherit; text-decoration:none; }

h1{
    margin: 0 0 16px;
    font-size: 28px;
    letter-spacing: -.2px;
}

.front-wrap{
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.page-header{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.back-link{
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    font-weight: 800;
    color: var(--text);
}

.back-link:hover{ background: var(--primary-soft); }

.page-title{
    font-size: 16px;
    font-weight: 900;
    color: var(--text);
}

.card{
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow2);
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    font-weight: 750;
    cursor:pointer;
    transition: .15s ease;
    color: #111827;
}
.btn-primary{
    background: var(--primary);
    border-color: rgba(43,108,255,.35);
    color:#fff;
}
.btn-primary:hover{ background: var(--primary-dark); }
.btn-ghost{ background: transparent; }

.input, select, textarea{
    width:100%;
    padding: 12px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    outline: none;
    transition: box-shadow .15s ease, border-color .15s ease;
}

.input:focus, select:focus, textarea:focus{
    border-color: rgba(43,108,255,.45);
    box-shadow: 0 0 0 4px rgba(43,108,255,.12);
}

.calendar-container{
    padding: 18px;
}

.calendar-grid{
    display: grid;
    grid-template-columns: 100px repeat(7, 1fr);
    gap: 1px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.calendar-header{
    display: contents;
}

.time-header,
.day-header{
    background: #FAFBFF;
    color: var(--muted);
    text-align: center;
    padding: 10px;
    font-weight: 800;
    border-bottom: 1px solid var(--border);
}

.time-row{
    display: contents;
}

.time-row--empty .time-label,
.time-label--empty{
    padding: 6px 8px;
    font-size: 12px;
    font-weight: 650;
    color: #9CA3AF;
}

.time-label{
    background: #fff;
    text-align: center;
    padding: 10px;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
    font-weight: 750;
}

.calendar-slot{
    position: relative;
    padding: 10px;
    background-color: #ffffff;
    min-height: 30px;
    border-bottom: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.calendar-slot--empty{
    padding: 3px 6px;
    min-height: 12px;
    background: #FCFDFF;
}

.calendar-slot--empty .empty-slot{
    min-height: 10px;
}

.kurs-item{
    border-radius: 14px;
    padding: 10px;
    margin-top: 5px;
    background: linear-gradient(156deg, rgba(43,108,255,.18) 10%, rgba(21,198,212,.10) 60%, rgba(17,24,39,.06) 100%);
    border: 1px solid rgba(43,108,255,.18);
    color: var(--text);
    font-size: 12px;
    text-align: center;
}

.kurs-item h3{
    font-size: 14px;
    margin: 0 0 6px;
    font-weight: 900;
}

.kurs-item p{ margin: 0 0 8px; color: var(--muted); }

.kurs-item ul{ padding-left: 16px; margin: 8px 0 0; text-align:left; color: var(--muted); }
.kurs-item li{ margin-bottom: 5px; }

.empty-slot{ min-height: 30px; }

button{
    background-color: var(--primary);
    color: #fff;
    padding: 8px 10px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 6px;
    font-weight: 800;
}

button:hover{ background-color: var(--primary-dark); }

.popup-overlay{
    position: fixed;
    inset: 0;
    background: rgba(17,24,39,.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.popup-content{
    background: #fff;
    padding: 18px;
    border-radius: var(--radius);
    width: min(420px, 100%);
    max-height: 90vh;
    overflow: auto;
    text-align: left;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.popup-content p{ margin: 0 0 12px; font-weight: 800; }

#booking-form label{ display:block; margin: 10px 0 6px; font-weight: 800; font-size: 13px; color: #374151; }

#booking-form input[type="text"],
#booking-form input[type="email"],
#booking-form select{
    width:100%;
}

label.dsg{ font-size: 14px; font-weight: 600; color: var(--muted); }
label.dsg a{ color: var(--primary); }

#booking-form button[type="submit"]{ width:100%; }
#booking-form button[type="button"]{ width:100%; background: #fff; color: var(--text); border: 1px solid var(--border); }
#booking-form button[type="button"]:hover{ background: var(--primary-soft); }

.calendar-list{ display:none; }

@media screen and (max-width: 768px){
    .front-wrap{ padding: 16px; }
    .calendar-grid{ display:none; }
    .calendar-list{ display:block; }
    .popup-content{ width: 100%; }
}