/* =========================================
   GLOBAL VARIABLES & RESET
========================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary: #4a90e2;
    --primary-hover: #357abd;
    --background: #f4f7fb;
    --card-bg: #ffffff;
    --text: #333333;
    --text-light: #777777;
    --border: #e1e8ed;
    --locked: #d9534f;
    --success: #107c10;
    --success-bg: #e8fce8;
    --success-border: #b7eeb7;
    --warning: #856404;
    --warning-bg: #fff3cd;
    --warning-border: #ffeeba;
}

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
}

body { 
    background-color: var(--background); 
    color: var(--text); 
    padding: 30px 20px; 
    line-height: 1.6;
}

.container { 
    max-width: 900px; 
    margin: 0 auto; 
}

.booking-card { 
    background: var(--card-bg); 
    padding: 35px; 
    border-radius: 12px; 
    box-shadow: 0 8px 25px rgba(0,0,0,0.06); 
}

h2, h3, h4 { 
    color: #222; 
    margin-bottom: 15px; 
}

/* =========================================
   FORMS, INPUTS & BUTTONS
========================================= */
label { 
    font-weight: 600; 
    font-size: 14px; 
    display: block; 
    margin-top: 15px; 
    margin-bottom: 6px;
    color: #444;
}

input[type="text"], 
input[type="email"], 
input[type="password"], 
input[type="number"], 
input[type="date"], 
select, 
textarea { 
    width: 100%; 
    padding: 12px 15px; 
    margin-bottom: 15px; 
    border: 1px solid var(--border); 
    border-radius: 6px; 
    font-size: 15px; 
    outline: none;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.submit-btn { 
    background: var(--primary); 
    color: white; 
    border: none; 
    padding: 14px 20px; 
    border-radius: 6px; 
    font-size: 16px; 
    font-weight: bold; 
    cursor: pointer; 
    width: 100%; 
    transition: all 0.3s ease; 
}

.submit-btn:hover { 
    background: var(--primary-hover); 
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

/* =========================================
   ADMIN DASHBOARD STYLES
========================================= */
.admin-nav { 
    display: flex; 
    gap: 10px; 
    margin-bottom: 25px; 
    border-bottom: 2px solid var(--border); 
    padding-bottom: 15px; 
    flex-wrap: wrap; 
}

.admin-nav button { 
    background: transparent; 
    border: none; 
    font-size: 15px; 
    font-weight: 600; 
    color: var(--text-light); 
    cursor: pointer; 
    padding: 10px 18px; 
    border-radius: 6px; 
    transition: 0.3s; 
}

.admin-nav button.active { 
    background: var(--primary); 
    color: white; 
}

.admin-nav button:hover:not(.active) { 
    background: #f0f4f8; 
    color: var(--primary);
}

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.4s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.admin-table { 
    width: 100%; 
    border-collapse: collapse; 
    margin-bottom: 20px; 
    font-size: 15px; 
}

.admin-table th, .admin-table td { 
    border: 1px solid var(--border); 
    padding: 12px 15px; 
    text-align: left; 
}

.admin-table th { 
    background: #f8fafc; 
    font-weight: 600; 
    color: #444;
}

.manual-lock-box { 
    background: #f8fafc; 
    padding: 25px; 
    border: 1px solid var(--border); 
    border-radius: 8px; 
    margin-bottom: 30px; 
}

.time-checkbox { 
    background: white; 
    border: 1px solid var(--border); 
    padding: 10px 15px; 
    border-radius: 6px; 
    cursor: pointer; 
    display: inline-flex; 
    align-items: center; 
    gap: 10px; 
    font-size: 14px; 
    font-weight: 500; 
    transition: 0.3s; 
    user-select: none; 
    flex: 1 1 calc(25% - 10px); 
    min-width: 130px; 
}

.time-checkbox:hover { border-color: var(--primary); background: #f0f4f8; }
.time-checkbox input { width: 18px; height: 18px; margin: 0; cursor: pointer; accent-color: var(--primary); }

#locked-list { list-style: none; padding: 0; margin-top: 15px; margin-bottom: 25px; }

.locked-item { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    background: #ffffff; 
    border: 1px solid var(--border); 
    padding: 15px 20px; 
    margin-bottom: 12px; 
    border-radius: 8px; 
    box-shadow: 0 2px 4px rgba(0,0,0,0.02); 
    transition: 0.3s; 
}

.locked-item:hover { border-color: #cbd5e1; box-shadow: 0 4px 6px rgba(0,0,0,0.04); }
.locked-item-info { font-size: 15px; color: var(--text); line-height: 1.4; }
.locked-item-info strong { font-size: 16px; color: #111; }

.unlock-btn { 
    background: var(--locked); 
    color: white; 
    border: none; 
    padding: 8px 16px; 
    border-radius: 6px; 
    cursor: pointer; 
    font-size: 14px; 
    font-weight: 600; 
    transition: 0.3s; 
}

.unlock-btn:hover { background: #c9302c; box-shadow: 0 3px 8px rgba(217, 83, 79, 0.3); }

/* =========================================
   FRONTEND CALENDAR & DATE SELECTION UI
========================================= */

#calendar-header {
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.calendar-grid { 
    display: grid; 
    grid-template-columns: repeat(7, 1fr); 
    gap: 10px; 
    margin-bottom: 25px; 
}

.calendar-grid div:empty {
    background-color: transparent;
    border: none;
    pointer-events: none;
}

.day-header { 
    font-weight: 700; 
    text-align: center; 
    color: var(--text-light); 
    padding-bottom: 10px; 
    font-size: 13px;
    text-transform: uppercase;
    border-bottom: 2px solid var(--border);
    margin-bottom: 5px;
}

/* Beautiful Square Date Buttons */
.day { 
    aspect-ratio: 1 / 1; /* Forces a perfect square */
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px; 
    font-weight: 600; 
    font-size: 16px;
    transition: all 0.2s ease; 
}

.time-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); 
    gap: 12px; 
    margin-bottom: 25px; 
}

.time-slot { 
    padding: 14px; 
    text-align: center; 
    border-radius: 8px; 
    font-weight: 600; 
    transition: all 0.2s ease; 
}

/* ✅ Available class (Green) */
.available-item { 
    background-color: var(--success-bg) !important; 
    color: var(--success) !important; 
    border: 2px solid var(--success-border) !important; 
    cursor: pointer; 
}

.available-item:hover { 
    background-color: #d4f8d4 !important; 
    transform: translateY(-3px); 
    box-shadow: 0 4px 10px rgba(16,124,16,0.15); 
    border-color: #90da90 !important;
}

/* 🎯 Selected Date / Time Active State */
.available-item.selected { 
    background-color: var(--success) !important; 
    color: white !important; 
    border-color: #0b5c0b !important;
    transform: scale(1.05); /* Pops the button out slightly */
    box-shadow: 0 6px 15px rgba(16,124,16,0.3);
}

/* ❌ Locked/Booked class (Yellow & Crossed out) */
.locked-item-ui { 
    background-color: var(--warning-bg) !important; 
    color: var(--warning) !important; 
    text-decoration: line-through !important; 
    pointer-events: none !important; 
    cursor: not-allowed !important; 
    opacity: 0.65; 
    border: 2px solid var(--warning-border) !important; 
}

/* Responsive adjustments for Mobile */
@media (max-width: 600px) {
    .calendar-grid { gap: 5px; }
    .day { font-size: 14px; border-radius: 6px; }
    .booking-card { padding: 20px; }
    .time-checkbox { flex: 1 1 100%; }
    .locked-item { flex-direction: column; align-items: flex-start; gap: 15px; }
    .unlock-btn { width: 100%; }
}