/* CSS Variables for theming */
    :root {
        --primary-color: #a37842;
        /* Dark Olive Green */
        --secondary-color: #8B4513;
        /* Saddle Brown */
        --accent-color: #a37842;
        --border-color: #a37842;
        /* Tan */
        --dark-bg: #1a1b2e;
        --card-bg: rgba(255, 255, 255, 0.95);
        --text-dark: #2d3748;
        /* Based on primary-color */
        --success-color: #48bb78;
        --error-color: #dc3545;
    }

    body {
        background-color: #fbfbfb;
        background-size: 400% 400%;
        animation: gradientShift 15s ease infinite;
        min-height: 100vh;
    }

    @keyframes gradientShift {
        0% {
            background-position: 0% 50%;
        }

        50% {
            background-position: 100% 50%;
        }

        100% {
            background-position: 0% 50%;
        }
    }

    .form-container {
        background: var(--card-bg);
        backdrop-filter: blur(20px);
        border-radius: 15px;
        padding: 40px;
        margin: 20px auto;
        max-width: 900px;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        border: 1px solid rgba(255, 255, 255, 0.2);
        position: relative;
        overflow: hidden;
    }

    .section-header {
        border: 2px solid var(--accent-color);
        background-color: #1b4098;
        color: white;
        padding: 16px 24px;
        border-radius: 16px;
        margin: 30px 0 20px 0;
        font-size: 18px;
        text-align: center;
        box-shadow: 0 8px 15px rgba(85, 107, 47, 0.3);
        /* Based on primary-color */
        position: relative;
        overflow: hidden;
    }

    .section-header::after {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        animation: shimmer 3s infinite;
    }

    @keyframes shimmer {
        0% {
            left: -100%;
        }

        100% {
            left: 100%;
        }
    }

    .event-section {
        padding-left: 15px;
    }

    .required {
        color: var(--error-color);
        font-weight: 600;
    }

    .form-control,
    .form-select {
        border-radius: 12px;
        border: 2px solid var(--accent-color);
        background: rgba(255, 255, 255, 0.9);
        /* padding: 12px 16px; */
        /* transition: all 0.3s ease; */
        font-size: 16px;
    }

    label {
        font-weight: 600;
        color: var(--text-dark);
        margin-top: 8px;
        margin-bottom: 2px;
    }

    .form-check {
        margin: 12px 0;
        padding-left: 2rem;
    }

    .form-check-input[type="radio"],
    .custom-control-input[type="radio"] {
        appearance: none;
        -webkit-appearance: none;
        background: #fff;
        border: 3px solid var(--primary-color);
        width: 1.4em;
        height: 1.4em;
        border-radius: 50%;
        margin-top: 0.5rem;
        margin-left: -1.85rem;
        transition: border-color 0.2s, box-shadow 0.2s;
        cursor: pointer;
    }

    .form-check-input[type="radio"]:checked,
    .custom-control-input[type="radio"]:checked {
        border-color: var(--primary-color);
        background-color: #fff;
        box-shadow: 0 0 0 2px var(--primary-color);
    }

    .form-check-input[type="radio"]:checked::before,
    .custom-control-input[type="radio"]:checked::before {
        content: '';
        display: block;
        width: 0.7em;
        height: 0.7em;
        border-radius: 50%;
        background: #1b4098;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    .form-check-input[type="radio"]:focus,
    .custom-control-input[type="radio"]:focus {
        outline: none;
        box-shadow: 0 0 0 2px #1b409855;
    }

    /* Checkbox */
    .form-check-input[type="checkbox"],
    .custom-control-input[type="checkbox"] {
        appearance: none;
        -webkit-appearance: none;
        background: #fff;
        border: 3px solid var(--primary-color);
        width: 1.4em;
        height: 1.4em;
        border-radius: 6px;
        display: inline-block;
        position: relative;
        vertical-align: middle;
        margin-top: 0.1rem;
        margin-left: -1.9rem;
        transition: border-color 0.2s, box-shadow 0.2s;
        cursor: pointer;
    }

    .form-check-input[type="checkbox"]:checked,
    .custom-control-input[type="checkbox"]:checked {
        border-color: var(--primary-color);
        background-color: #fff;
        box-shadow: 0 0 0 2px var(--primary-color);
    }

    .form-check-input[type="checkbox"]:checked::before,
    .custom-control-input[type="checkbox"]:checked::before {
        content: '';
        display: block;
        width: 0.7em;
        height: 0.7em;
        border-radius: 4px;
        background: #1b4098;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    .form-check-input[type="checkbox"]:focus,
    .custom-control-input[type="checkbox"]:focus {
        outline: none;
        box-shadow: 0 0 0 2px #1b409855;
    }

    /* Hide Bootstrap default checkmark */
    .form-check-input[type="checkbox"]:checked,
    .custom-control-input[type="checkbox"]:checked,
    .form-check-input[type="radio"]:checked,
    .custom-control-input[type="radio"]:checked {
        background-image: none;
    }

    .form-check-label {
        font-weight: 500;
        color: var(--text-dark);
    }

    .file-upload {
        position: relative;
        display: inline-block;
        width: 100%;
    }

    .file-upload input[type=file] {
        position: absolute;
        left: -9999px;
    }

    .file-upload-label {
        display: flex;
        align-items: center;
        padding: 12px 16px;
        background: rgba(255, 255, 255, 0.9);
        border: 2px dashed var(--border-color);
        border-radius: 12px;
        cursor: pointer;
        transition: all 0.3s ease;
        min-height: 50px;
    }

    .file-upload-label:hover {
        border-color: var(--primary-color);
        background: white;
        transform: translateY(-1px);
    }

    .file-upload-icon {
        width: 24px;
        height: 24px;
        background: var(--primary-color);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-right: 12px;
        color: white;
        font-weight: bold;
    }

    .submit-btn {
        background: var(--accent-color);
        border: none;
        color: white;
        padding: 16px 48px;
        border-radius: 15px;
        font-weight: 700;
        font-size: 16px;
        margin: 30px auto;
        display: block;
        transition: all 0.3s ease;
        box-shadow: 0 8px 25px rgba(85, 107, 47, 0.3);
        /* Based on primary-color */
        position: relative;
        overflow: hidden;
    }

    .submit-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 35px rgba(85, 107, 47, 0.4);
        /* Based on primary-color */
        color: white;
    }

    .submit-btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: var(--accent-color);
        transition: left 0.6s;
    }

    .second-section {
        background: #dde1ed;
        border-radius: 16px;
        padding: 10px;
        margin: 30px 0;
        border: 1px solid rgba(85, 107, 47, 0.1);
        /* Based on primary-color */
    }

    .privacy-textarea {
        background: white;
        border: 1px solid var(--border-color);
        border-radius: 12px;
        padding: 16px;
        min-height: 120px;
        resize: vertical;
        font-size: 13px;
        line-height: 1.5;
    }

    .agreement-check {
        align-items: flex-start;
        margin: 20px 0;
        padding: 16px;
        border-radius: 12px;
        border: 1px solid rgba(85, 107, 47, 0.1);
    }

    .agreement-check input[type="checkbox"] {
        margin-right: 12px;
        margin-top: 2px;
        width: 18px;
        height: 18px;
        flex-shrink: 0;
    }

    .agreement-text {
        font-size: 14px;
        line-height: 1.5;
        color: var(--text-dark);
    }

    /* Error styling */
    .is-invalid {
        border-color: var(--error-color) !important;
        box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1) !important;
        /* Based on error-color */
    }

    .invalid-feedback {
        display: none;
        /* Hide by default */
        color: var(--error-color);
        font-size: 15px;
        margin-top: 6px;
        font-weight: 600;
    }

    .airport-selection {
        display: flex;
        gap: 20px;
        margin: 16px 0;
    }

    .airport-option {
        flex: 1;
        position: relative;
    }

    .airport-option input[type="radio"] {
        position: absolute;
        opacity: 0;
    }

    .airport-option label {
        display: block;
        padding: 16px;
        background: rgba(255, 255, 255, 0.9);
        border: 2px solid var(--border-color);
        border-radius: 12px;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s ease;
        font-weight: 600;
        font-size: 16px;
    }

    .airport-option input[type="radio"]:checked+label {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(85, 107, 47, 0.3);
        /* Based on primary-color */
    }

    .airport-option label:hover {
        transform: translateY(-1px);
        border-color: var(--primary-color);
    }

    .input-with-icon {
        position: relative;
    }

    .input-icon {
        position: absolute;
        left: 16px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--primary-color);
        font-size: 18px;
    }

    .input-with-icon .form-control {
        padding-left: 48px;
    }

    @media (max-width: 768px) {
        .form-container {
            margin: 10px;
            padding: 24px;
            border-radius: 16px;
        }

        .airport-selection {
            flex-direction: column;
            gap: 12px;
        }
    }

    .form-control:disabled,
    .form-control[readonly] {
        background-color: #f8f9fa;
        opacity: 1;
        cursor: not-allowed;
    }

    .time-select-group {
        display: flex;
        gap: 5px;
    }

    .time-select-group .custom-select {
        flex: 1;
        /* Distribute width equally */
        padding-right: 0.75rem;
        /* Adjust padding for better look with icon */
    }