@php
    $isEdit = isset($banner) && $banner->exists && $banner->id;
    $formAction = $isEdit 
        ? route('admin.banners.update', $banner->id) 
        : route('admin.banners.store');
    $formMethod = $isEdit ? 'PUT' : 'POST';
    $formTitle = $isEdit ? 'Edit Banner' : 'Create Banner';
    $submitText = $isEdit ? 'Update Banner' : 'Save Banner';
@endphp

<style>
    /* ============================================
       BANNER FORM - REDSPIDER THEME
    ============================================ */

    .form-section .form-group-custom:last-child {
        margin-bottom: 0;
    }

    .form-card-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        margin-bottom: 24px;
        padding-bottom: 16px;
        border-bottom: 1px solid #E8E8E8;
    }

    .form-card-header h4 {
        font-size: 18px;
        font-weight: 600;
        color: #1A1A2E;
        margin: 0;
    }

    .form-card-header h4 i {
        color: #C1121F;
    }

    .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 20px;
        border-radius: 10px;
        background: #F8F9FA;
        border: 1px solid #E8E8E8;
        color: #4A5568;
        text-decoration: none;
        font-size: 13px;
        font-weight: 500;
        font-family: 'Poppins', sans-serif;
        transition: all 0.3s ease;
    }

    .btn-back:hover {
        background: rgba(193, 18, 31, 0.06);
        border-color: rgba(193, 18, 31, 0.2);
        color: #C1121F;
        transform: translateX(-2px);
    }

    .form-section {
        background: #FAFBFC;
        border-radius: 14px;
        padding: 20px 24px;
        border: 1px solid #F0F0F0;
        transition: all 0.3s ease;
        margin-bottom: 20px;
    }

    .form-section:hover {
        border-color: rgba(193, 18, 31, 0.08);
    }

    .section-header {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }

    .section-header i {
        font-size: 18px;
        color: #C1121F;
    }

    .section-header h5 {
        font-size: 15px;
        font-weight: 600;
        color: #1A1A2E;
        margin: 0;
    }

    .section-header .badge-optional {
        margin-left: auto;
        padding: 2px 12px;
        border-radius: 12px;
        background: #E8E8E8;
        color: #6B7280;
        font-size: 10px;
        font-weight: 600;
        text-transform: uppercase;
    }

    .form-group-custom {
        margin-bottom: 18px;
    }

    .form-group-custom label {
        display: block;
        font-size: 13px;
        font-weight: 600;
        color: #1A1A2E;
        margin-bottom: 6px;
    }

    .form-group-custom label .required {
        color: #DC2626;
        margin-left: 2px;
    }

    .form-control-custom {
        width: 100%;
        padding: 10px 14px;
        border: 1.5px solid #E8E8E8;
        border-radius: 10px;
        font-size: 14px;
        font-family: 'Poppins', sans-serif;
        color: #1A1A2E;
        background: #FFFFFF;
        transition: all 0.3s ease;
        outline: none;
    }

    .form-control-custom:focus {
        border-color: #C1121F;
        box-shadow: 0 0 0 4px rgba(193, 18, 31, 0.06);
    }

    .form-control-custom.is-invalid {
        border-color: #DC2626;
    }

    .form-control-custom.is-invalid:focus {
        box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.06);
    }

    .form-control-custom::placeholder {
        color: #9CA3AF;
        font-size: 13px;
    }

    textarea.form-control-custom {
        resize: vertical;
        min-height: 80px;
    }

    select.form-control-custom {
        appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        padding-right: 36px;
    }

    .form-hint {
        display: block;
        font-size: 12px;
        color: #6B7280;
        margin-top: 4px;
    }

    .error-text {
        display: block;
        color: #DC2626;
        font-size: 12px;
        margin-top: 4px;
    }

    .input-with-prefix {
        display: flex;
        align-items: center;
        border: 1.5px solid #E8E8E8;
        border-radius: 10px;
        background: #FFFFFF;
        transition: all 0.3s ease;
        overflow: hidden;
    }

    .input-with-prefix:focus-within {
        border-color: #C1121F;
        box-shadow: 0 0 0 4px rgba(193, 18, 31, 0.06);
    }

    .input-with-prefix .prefix {
        padding: 10px 12px;
        background: #F8F9FA;
        color: #6B7280;
        font-size: 13px;
        font-weight: 500;
        border-right: 1px solid #E8E8E8;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .input-with-prefix .form-control-custom {
        border: none !important;
        border-radius: 0 !important;
        padding: 10px 14px;
    }

    .input-with-prefix .form-control-custom:focus {
        box-shadow: none !important;
    }

    .slug-preview {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 4px 12px;
        background: #F8F9FA;
        border-radius: 6px;
        border: 1px solid #E8E8E8;
        font-size: 13px;
        font-family: 'Poppins', sans-serif;
        color: #6B7280;
        margin-top: 6px;
    }

    .slug-preview code {
        color: #C1121F;
        font-weight: 600;
        background: transparent;
        padding: 0;
    }

    .btn-regenerate {
        background: none;
        border: none;
        color: #6B7280;
        cursor: pointer;
        padding: 2px 8px;
        font-size: 12px;
        transition: all 0.3s ease;
        text-decoration: none;
    }

    .btn-regenerate:hover {
        color: #C1121F;
    }

    .image-preview-wrapper {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
        padding: 12px 16px;
        background: #F8F9FA;
        border-radius: 10px;
        border: 1px solid #E8E8E8;
        margin-top: 8px;
    }

    .image-preview-wrapper img {
        width: 80px;
        height: 80px;
        object-fit: cover;
        border-radius: 8px;
        border: 1px solid #E8E8E8;
    }

    .image-preview-wrapper .file-name {
        font-size: 13px;
        color: #1A1A2E;
        font-weight: 500;
    }

    .image-preview-wrapper .file-size {
        font-size: 12px;
        color: #6B7280;
    }

    .image-preview-wrapper .remove-file {
        background: none;
        border: none;
        color: #DC2626;
        cursor: pointer;
        padding: 4px 8px;
        font-size: 14px;
        transition: all 0.3s ease;
    }

    .image-preview-wrapper .remove-file:hover {
        transform: scale(1.2);
    }

    .file-upload-area {
        border: 2px dashed #E8E8E8;
        border-radius: 10px;
        padding: 24px;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s ease;
        background: #FAFBFC;
    }

    .file-upload-area:hover {
        border-color: #C1121F;
        background: rgba(193, 18, 31, 0.02);
    }

    .file-upload-area i {
        font-size: 32px;
        color: #C1121F;
        opacity: 0.4;
        display: block;
        margin-bottom: 8px;
    }

    .file-upload-area p {
        font-size: 14px;
        color: #6B7280;
        margin: 0;
    }

    .file-upload-area small {
        font-size: 12px;
        color: #9CA3AF;
    }

    .toggle-switch-custom {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 8px 0;
    }

    .toggle-switch-custom .switch {
        position: relative;
        width: 48px;
        height: 26px;
        flex-shrink: 0;
    }

    .toggle-switch-custom .switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }

    .toggle-switch-custom .switch .slider {
        position: absolute;
        cursor: pointer;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: #E8E8E8;
        transition: all 0.4s ease;
        border-radius: 26px;
    }

    .toggle-switch-custom .switch .slider::before {
        content: "";
        position: absolute;
        height: 18px;
        width: 18px;
        left: 4px;
        bottom: 4px;
        background: #FFFFFF;
        transition: all 0.4s ease;
        border-radius: 50%;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    }

    .toggle-switch-custom .switch input:checked+.slider {
        background: linear-gradient(135deg, #C1121F, #780000);
    }

    .toggle-switch-custom .switch input:checked+.slider::before {
        transform: translateX(22px);
    }

    .toggle-switch-custom .switch input:focus+.slider {
        box-shadow: 0 0 0 3px rgba(193, 18, 31, 0.15);
    }

    .form-actions {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-top: 8px;
        padding-top: 20px;
        border-top: 1px solid #E8E8E8;
        flex-wrap: wrap;
    }

    .btn-submit {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 28px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 600;
        font-family: 'Poppins', sans-serif;
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        background: linear-gradient(135deg, #C1121F, #780000);
        border: none;
        color: #FFFFFF;
        box-shadow: 0 4px 16px rgba(193, 18, 31, 0.25);
    }

    .btn-submit:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(193, 18, 31, 0.35);
    }

    .btn-submit:active {
        transform: scale(0.96);
    }

    .btn-cancel {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 10px 24px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 500;
        font-family: 'Poppins', sans-serif;
        cursor: pointer;
        transition: all 0.3s ease;
        background: transparent;
        border: 1px solid #E8E8E8;
        color: #4A5568;
        text-decoration: none;
    }

    .btn-cancel:hover {
        background: #F8F9FA;
        border-color: #D1D5DB;
    }

    .btn-reset-custom {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 10px 20px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 500;
        font-family: 'Poppins', sans-serif;
        cursor: pointer;
        transition: all 0.3s ease;
        background: transparent;
        border: 1px solid #E8E8E8;
        color: #4A5568;
    }

    .btn-reset-custom:hover {
        background: #F8F9FA;
        border-color: #D1D5DB;
    }

    @media (max-width: 576px) {
        .form-section {
            padding: 14px 16px !important;
        }

        .form-card-header {
            flex-direction: column;
            align-items: flex-start;
        }

        .form-actions {
            flex-direction: column;
        }

        .form-actions .btn-submit,
        .form-actions .btn-cancel,
        .form-actions .btn-reset-custom {
            width: 100%;
            justify-content: center;
        }

        .image-preview-wrapper {
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
    }
</style>

<!-- ============================================
   ALERT MESSAGES
============================================ -->

@if ($errors->any())
<div class="alert-box alert-error" style="margin-bottom: 20px;">
    <i class="bi bi-exclamation-circle-fill"></i>
    <span>
        <strong>Validation Errors!</strong>
        <ul style="margin: 4px 0 0 20px; padding: 0;">
            @foreach ($errors->all() as $error)
            <li>{{ $error }}</li>
            @endforeach
        </ul>
    </span>
    <button type="button" class="alert-close-btn" onclick="this.closest('.alert-box').remove()">
        <i class="bi bi-x"></i>
    </button>
</div>
@endif

<!-- ============================================
   FORM CARD
============================================ -->



    <div class="form-card-header">
        <h4>
            <i class="bi bi-image"></i>
            {{ $formTitle }}
        </h4>
        <a href="{{ route('admin.banners.index') }}" class="btn-back">
            <i class="bi bi-arrow-left"></i> Back to List
        </a>
    </div>

    <!-- ===== FORM START ===== -->
    <form action="{{ $formAction }}" method="POST" enctype="multipart/form-data" id="bannerForm">
        @csrf
        @if($isEdit)
        @method('PUT')
        @endif

        <div class="row">
            <!-- ===== LEFT COLUMN ===== -->
            <div class="col-lg-8">

                <!-- Basic Information -->
                <div class="form-section">
                    <div class="section-header">
                        <i class="bi bi-info-circle"></i>
                        <h5>Basic Information</h5>
                    </div>

                    <!-- Title -->
                    <div class="form-group-custom">
                        <label>Title <span class="required">*</span></label>
                        <input type="text"
                               name="title"
                               id="title"
                               class="form-control-custom @error('title') is-invalid @enderror"
                               value="{{ old('title', $banner->title ?? '') }}"
                               placeholder="Enter banner title"
                               required>
                        @error('title')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>

                    <!-- Slug -->
                    <div class="form-group-custom">
                        <label>Slug</label>
                        <div class="input-with-prefix">
                            <span class="prefix">{{ url('/') }}/banner/</span>
                            <input type="text"
                                   name="slug"
                                   id="slug"
                                   class="form-control-custom @error('slug') is-invalid @enderror"
                                   value="{{ old('slug', $banner->slug ?? '') }}"
                                   placeholder="banner-slug"
                                   data-auto-generated="{{ isset($banner) && $banner->slug ? 'false' : 'true' }}">
                        </div>
                        @error('slug')
                        <span class="error-text">{{ $message }}</span>
                        @enderror

                        <div class="slug-preview">
                            <i class="bi bi-link"></i>
                            Preview: <code id="slugPreview">
                                @if(isset($banner) && $banner->slug)
                                {{ $banner->slug }}
                                @else
                                auto-generated
                                @endif
                            </code>
                            <button type="button" class="btn-regenerate" onclick="generateSlug()">
                                <i class="bi bi-arrow-repeat"></i> Regenerate
                            </button>
                        </div>
                    </div>

                    <!-- Description -->
                    <div class="form-group-custom">
                        <label>Description</label>
                        <textarea name="description"
                                  rows="4"
                                  class="form-control-custom @error('description') is-invalid @enderror"
                                  placeholder="Enter description...">{{ old('description', $banner->description ?? '') }}</textarea>
                        @error('description')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>

                    <!-- Button -->
                    <div class="row">
                        <div class="col-md-6">
                            <div class="form-group-custom">
                                <label>Button Text</label>
                                <input type="text"
                                       name="button_text"
                                       class="form-control-custom @error('button_text') is-invalid @enderror"
                                       value="{{ old('button_text', $banner->button_text ?? '') }}"
                                       placeholder="e.g., Learn More">
                                @error('button_text')
                                <span class="error-text">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="form-group-custom" style="margin-bottom: 0;">
                                <label>Button URL</label>
                                <input type="url"
                                       name="button_url"
                                       class="form-control-custom @error('button_url') is-invalid @enderror"
                                       value="{{ old('button_url', $banner->button_url ?? '') }}"
                                       placeholder="https://...">
                                @error('button_url')
                                <span class="error-text">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>
                    </div>
                </div>

                <!-- SEO Section -->
                <div class="form-section">
                    <div class="section-header">
                        <i class="bi bi-search"></i>
                        <h5>SEO Settings</h5>
                        <span class="badge-optional">Optional</span>
                    </div>

                    <div class="form-group-custom">
                        <label>Meta Title</label>
                        <input type="text"
                               name="meta_title"
                               class="form-control-custom @error('meta_title') is-invalid @enderror"
                               value="{{ old('meta_title', $banner->meta_title ?? '') }}"
                               placeholder="SEO title (max 60 chars)">
                        @error('meta_title')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>

                    <div class="form-group-custom" style="margin-bottom: 0;">
                        <label>Meta Description</label>
                        <textarea name="meta_description"
                                  rows="2"
                                  class="form-control-custom @error('meta_description') is-invalid @enderror"
                                  placeholder="SEO description (max 160 chars)">{{ old('meta_description', $banner->meta_description ?? '') }}</textarea>
                        @error('meta_description')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>
                </div>
            </div>

            <!-- ===== RIGHT COLUMN ===== -->
            <div class="col-lg-4">

                <!-- Image -->
                <div class="form-section">
                    <div class="section-header">
                        <i class="bi bi-image"></i>
                        <h5>Banner Image</h5>
                    </div>

                    <div class="form-group-custom" style="margin-bottom: 0;">
                        <input type="file"
                               name="image"
                               id="imageInput"
                               class="form-control-custom @error('image') is-invalid @enderror"
                               accept="image/*"
                               style="display: none;"
                               onchange="previewImage(this, 'imagePreview')">
                        <div id="imagePreviewContainer">
                            @if(isset($banner) && $banner->image)
                            <div class="image-preview-wrapper">
                                <img src="{{ asset('storage/' . $banner->image) }}" alt="Image">
                                <div>
                                    <div class="file-name">Current Image</div>
                                    <div class="file-size">Click below to change</div>
                                </div>
                                <button type="button" class="remove-file" onclick="removeImage('imageInput', 'imagePreviewContainer')">
                                    <i class="bi bi-x-circle"></i>
                                </button>
                            </div>
                            @else
                            <div class="file-upload-area" onclick="document.getElementById('imageInput').click()">
                                <i class="bi bi-cloud-upload"></i>
                                <p>Click to upload banner image</p>
                                <small>PNG, JPG, WEBP (Max 2MB) | Recommended: 1920x400</small>
                            </div>
                            @endif
                        </div>
                        @error('image')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>
                </div>

                <!-- Settings -->
                <div class="form-section">
                    <div class="section-header">
                        <i class="bi bi-gear"></i>
                        <h5>Settings</h5>
                    </div>

                    <!-- Position -->
                    <div class="form-group-custom">
                        <label>Position</label>
                        <select name="position" class="form-control-custom @error('position') is-invalid @enderror">
                            <option value="">Select Position</option>
                            <option value="top" {{ old('position', $banner->position ?? '') == 'top' ? 'selected' : '' }}>Top</option>
                            <option value="bottom" {{ old('position', $banner->position ?? '') == 'bottom' ? 'selected' : '' }}>Bottom</option>
                            <option value="sidebar" {{ old('position', $banner->position ?? '') == 'sidebar' ? 'selected' : '' }}>Sidebar</option>
                            <option value="hero" {{ old('position', $banner->position ?? '') == 'hero' ? 'selected' : '' }}>Hero</option>
                        </select>
                        @error('position')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                        <span class="form-hint">Where this banner should appear on the page</span>
                    </div>

                    <!-- Banner Type -->
                    <div class="form-group-custom">
                        <label>Banner Type</label>
                        <select name="banner_type" class="form-control-custom @error('banner_type') is-invalid @enderror">
                            <option value="standard" {{ old('banner_type', $banner->banner_type ?? 'standard') == 'standard' ? 'selected' : '' }}>Standard</option>
                            <option value="hero" {{ old('banner_type', $banner->banner_type ?? 'standard') == 'hero' ? 'selected' : '' }}>Hero</option>
                            <option value="cta" {{ old('banner_type', $banner->banner_type ?? 'standard') == 'cta' ? 'selected' : '' }}>CTA</option>
                        </select>
                        @error('banner_type')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>

                    <!-- Page -->
                    <div class="form-group-custom">
                        <label>Page</label>
                        <select name="page_id" class="form-control-custom @error('page_id') is-invalid @enderror">
                            <option value="">All Pages (Global)</option>
                            @foreach($pages as $page)
                            <option value="{{ $page->id }}" {{ old('page_id', $banner->page_id ?? '') == $page->id ? 'selected' : '' }}>
                                {{ $page->title }}
                            </option>
                            @endforeach
                        </select>
                        @error('page_id')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                        <span class="form-hint">Select a specific page or leave as "All Pages" for global display</span>
                    </div>

                    <!-- Status -->
                    <div class="form-group-custom">
                        <label>Status <span class="required">*</span></label>
                        <select name="status" class="form-control-custom @error('status') is-invalid @enderror" required>
                            <option value="draft" {{ old('status', $banner->status ?? 'draft') == 'draft' ? 'selected' : '' }}>Draft</option>
                            <option value="published" {{ old('status', $banner->status ?? 'draft') == 'published' ? 'selected' : '' }}>Published</option>
                        </select>
                        @error('status')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                    </div>

                    <!-- Global -->
                    <div class="form-group-custom">
                        <div style="display: flex; align-items: center; gap: 12px; padding-top: 6px;">
                            <input type="hidden" name="is_global" value="0">
                            <input type="checkbox"
                                   name="is_global"
                                   id="is_global"
                                   value="1"
                                   {{ old('is_global', $banner->is_global ?? 0) ? 'checked' : '' }}
                                   style="width: 18px; height: 18px; accent-color: #C1121F; cursor: pointer;">
                            <label for="is_global" style="font-size: 13px; font-weight: 500; color: #1A1A2E; cursor: pointer;">
                                <i class="bi bi-globe" style="color: #3B82F6;"></i> Global Display
                            </label>
                        </div>
                        <span class="form-hint">If checked, this banner will appear on all pages</span>
                    </div>

                    <!-- Sort Order -->
                    <div class="form-group-custom" style="margin-bottom: 0;">
                        <label>Sort Order</label>
                        <input type="number"
                               name="sort_order"
                               class="form-control-custom @error('sort_order') is-invalid @enderror"
                               value="{{ old('sort_order', $banner->sort_order ?? 0) }}"
                               placeholder="0"
                               min="0">
                        @error('sort_order')
                        <span class="error-text">{{ $message }}</span>
                        @enderror
                        <span class="form-hint">Lower numbers appear first</span>
                    </div>
                </div>
            </div>
        </div>

        <!-- ===== FORM ACTIONS ===== -->
        <div class="form-actions">
            <button type="submit" class="btn-submit">
                <i class="bi bi-save"></i>
                {{ $submitText }}
            </button>
            <a href="{{ route('admin.banners.index') }}" class="btn-cancel">
                <i class="bi bi-x-circle"></i> Cancel
            </a>
            <button type="reset" class="btn-reset-custom">
                <i class="bi bi-arrow-counterclockwise"></i> Reset
            </button>
        </div>

    </form>


<!-- ============================================
   SCRIPT
============================================ -->
<script>
    document.addEventListener('DOMContentLoaded', function() {
        'use strict';

        // ============================================
        // SLUG GENERATION
        // ============================================
        const titleInput = document.getElementById('title');
        const slugInput = document.getElementById('slug');
        const slugPreview = document.getElementById('slugPreview');

        if (titleInput && slugInput) {
            titleInput.addEventListener('input', function() {
                if (!slugInput.value || slugInput.dataset.autoGenerated === 'true') {
                    const slug = generateSlugFromText(this.value);
                    slugInput.value = slug;
                    slugInput.dataset.autoGenerated = 'true';
                    updateSlugPreview(slug);
                }
            });

            if (!slugInput.value) {
                slugInput.dataset.autoGenerated = 'true';
            }
        }

        window.updateSlugPreview = function(slug) {
            if (slugPreview) {
                slugPreview.textContent = slug || 'auto-generated';
            }
        };

        window.generateSlug = function() {
            if (titleInput && titleInput.value) {
                const slug = generateSlugFromText(titleInput.value);
                slugInput.value = slug;
                slugInput.dataset.autoGenerated = 'true';
                updateSlugPreview(slug);
            } else {
                alert('Please enter a title first to generate slug.');
                titleInput.focus();
            }
        };

        function generateSlugFromText(text) {
            return text
                .toLowerCase()
                .replace(/[^a-z0-9]+/g, '-')
                .replace(/^-+|-+$/g, '');
        }

        // ============================================
        // IMAGE PREVIEW
        // ============================================
        window.previewImage = function(input, previewId) {
            const previewContainer = document.getElementById(previewId + 'Container');
            const file = input.files[0];

            if (file) {
                const reader = new FileReader();
                reader.onload = function(e) {
                    previewContainer.innerHTML = `
                        <div class="image-preview-wrapper">
                            <img src="${e.target.result}" alt="Preview">
                            <div>
                                <div class="file-name">${file.name}</div>
                                <div class="file-size">${(file.size / 1024).toFixed(1)} KB</div>
                            </div>
                            <button type="button" class="remove-file" onclick="removeImage('${input.id}', '${previewId}Container')">
                                <i class="bi bi-x-circle"></i>
                            </button>
                        </div>
                    `;
                };
                reader.readAsDataURL(file);
            }
        };

        // ============================================
        // REMOVE IMAGE
        // ============================================
        window.removeImage = function(inputId, containerId) {
            const previewContainer = document.getElementById(containerId);
            const imageInput = document.getElementById(inputId);

            if (previewContainer) {
                previewContainer.innerHTML = `
                    <div class="file-upload-area" onclick="document.getElementById('${inputId}').click()">
                        <i class="bi bi-cloud-upload"></i>
                        <p>Click to upload banner image</p>
                        <small>PNG, JPG, WEBP (Max 2MB) | Recommended: 1920x400</small>
                    </div>
                `;
            }

            if (imageInput) {
                imageInput.value = '';
            }
        };

        // ============================================
        // FORM VALIDATION
        // ============================================
        const form = document.getElementById('bannerForm');
        if (form) {
            form.addEventListener('submit', function(e) {
                const title = document.getElementById('title');
                if (title && !title.value.trim()) {
                    e.preventDefault();
                    title.classList.add('is-invalid');
                    alert('Please enter a banner title.');
                    title.focus();
                }
            });

            document.querySelectorAll('.form-control-custom').forEach(function(input) {
                input.addEventListener('input', function() {
                    this.classList.remove('is-invalid');
                });
            });
        }

        console.log('✅ Banner Form loaded successfully!');
    });
</script>