/* ===== CSS VARIABLES ===== */
:root
{
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --danger-color: #f44336;
    --light-bg: #f5f7fa;
    --dark-text: #1a0f2e;
    --border-color: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --transition: all 0.3s ease;
    --radius: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
}

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

/* ===== LAYOUT ===== */
.schedule-container {
    background: linear-gradient(135deg, var(--light-bg) 0%, #e8eef7 100%);
    padding: var(--spacing-lg);
    min-height: auto;
}

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

/* ===== SIDE NAVIGATION ===== */
.side-navigation {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.side-nav-left {
    left: 8px;
}

.side-nav-right {
    right: 8px;
}

.btn-side-nav {
    background-color: #0A3752;
    color: white;
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.4rem;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(10, 55, 82, 0.15);
    line-height: 1;
}

    .btn-side-nav:hover {
        background-color: #1e88e5;
        transform: scale(1.08);
    }

/* ===== CARDS ===== */
.card-section {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}
.card-section h2 {
    font-size: 1.1rem;
    color: var(--dark-text);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

    .form-group label {
        display: block;
        font-weight: 600;
        color: var(--dark-text);
        margin-bottom: var(--spacing-xs);
        font-size: 0.8rem;
        text-transform: uppercase;
        letter-spacing: 0.2px;
    }

.form-control {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: var(--transition);
    font-family: inherit;
}

    .form-control:focus {
        outline: none;
        border-color: var(--primary-color);
        box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.08);
    }

.form-check-input {
    width: 16px;
    height: 16px;
    margin: 0 var(--spacing-sm) 0 0;
    cursor: pointer;
}

/* ===== CALENDAR GRID ===== */
.selectdate {
    margin-bottom: var(--spacing-md);
}

    .selectdate center {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
        flex-wrap: wrap;
    }

    .selectdate input {
        padding: 8px 12px;
        border: 1px solid var(--border-color);
        border-radius: 6px;
        font-size: 0.9rem;
        text-align: center;
        min-width: 130px;
    }

.row.displaytable {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    padding: var(--spacing-md) 0;
}

    .row.displaytable .col-2 {
        width: 100%;
        padding: 0 !important;
        margin: 0 !important;
    }

    .row.displaytable .btn-primary {
        width: 100%;
        padding: 6px 4px !important;
        height: 40px;
        font-size: 0.7rem;
        letter-spacing: 0;
        text-transform: none;
        border-radius: 6px;
    }

/* ===== BUTTONS ===== */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

    .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
    }

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: flex-start;
}

#ListTimes {
    background: var(--gradient-primary);
    color: white !important;
    border-radius: 6px;
    padding: var(--spacing-md) !important;
    display: inline-flex !important;
    border: none !important;
    font-weight: 600;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

/* ===== CUSTOMER FORMS ===== */
.customer-form-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.customer-form {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
}

    .customer-form h3 {
        font-size: 1rem;
        color: var(--dark-text);
        margin-bottom: var(--spacing-md);
        font-weight: 700;
    }

/* ===== VALIDATION ===== */
.text-danger {
    color: var(--danger-color);
    font-size: 0.75rem;
    margin-top: 2px;
    display: block;
}

.validation-summary {
    background-color: #ffebee;
    border-left: 4px solid var(--danger-color);
    padding: var(--spacing-md);
    border-radius: 6px;
    margin-bottom: var(--spacing-lg);
}

    .validation-summary h4 {
        color: var(--danger-color);
        margin: 0 0 var(--spacing-sm) 0;
        font-size: 0.95rem;
    }

    .validation-summary ul {
        margin: 0;
        padding-left: 16px;
    }

    .validation-summary li {
        color: #d32f2f;
        margin-bottom: 2px;
        font-size: 0.85rem;
    }

/* ===== UTILITIES ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

hr {
    margin: var(--spacing-lg) 0;
    opacity: 0.3;
}

/* ===== RESPONSIVE DESIGN ===== */
@@media (max-width: 768px) {
    .schedule-container {
        padding: var(--spacing-md);
    }

    .row.displaytable {
        grid-template-columns: repeat(5, 1fr);
        gap: 3px;
    }

        .row.displaytable .btn-primary {
            height: 36px;
            font-size: 0.65rem;
        }

    .customer-form-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .side-navigation {
        position: static;
        transform: none;
        flex-direction: row;
        width: 100%;
        justify-content: center;
        margin-bottom: var(--spacing-lg);
        gap: var(--spacing-sm);
    }

    .side-nav-left,
    .side-nav-right {
        position: static;
    }
}

@@media (max-width: 480px) {
    :root {
        --spacing-md: 8px;
        --spacing-lg: 12px;
    }

    .schedule-container {
        padding: var(--spacing-md);
    }

    .card-section {
        padding: var(--spacing-md);
    }

    .row.displaytable {
        grid-template-columns: repeat(4, 1fr);
        gap: 2px;
    }

        .row.displaytable .btn-primary {
            height: 32px;
            font-size: 0.6rem;
            padding: 4px 2px !important;
        }

    .selectdate center {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .selectdate input {
        min-width: 100%;
    }

    .btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .btn-side-nav {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}