/**
 * Book Submission & Stripe Payment — Frontend Styles
 * Responsive, modern UI. Uses CSS variables so it adapts to most themes.
 */

.bss-wrap {
        --bss-primary: #6d28d9;
        --bss-primary-hover: #5b21b6;
        --bss-primary-light: #ede9fe;
        --bss-text: #1f2937;
        --bss-text-muted: #6b7280;
        --bss-border: #e5e7eb;
        --bss-bg: #ffffff;
        --bss-bg-alt: #f9fafb;
        --bss-success: #059669;
        --bss-success-light: #d1fae5;
        --bss-error: #dc2626;
        --bss-error-light: #fee2e2;
        --bss-warning: #d97706;
        --bss-radius: 12px;
        --bss-radius-sm: 8px;
        --bss-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
        --bss-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.04);
        --bss-transition: 0.2s ease;

        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
        color: var(--bss-text);
        box-sizing: border-box;
        max-width: 100%;
}

.bss-wrap *,
.bss-wrap *::before,
.bss-wrap *::after {
        box-sizing: border-box;
}

/* ---------- Submission Form ---------- */

.bss-form-wrap {
        max-width: 760px;
        margin: 0 auto;
        background: var(--bss-bg);
        border: 1px solid var(--bss-border);
        border-radius: var(--bss-radius);
        box-shadow: var(--bss-shadow);
        overflow: hidden;
}

.bss-form-header {
        padding: 32px 32px 24px;
        text-align: center;
        background: linear-gradient(135deg, var(--bss-primary-light) 0%, #fff 100%);
        border-bottom: 1px solid var(--bss-border);
        position: relative;
}

.bss-form-title {
        margin: 0 0 8px;
        font-size: 1.75rem;
        font-weight: 700;
        color: var(--bss-text);
}

.bss-form-subtitle {
        margin: 0;
        color: var(--bss-text-muted);
        font-size: 0.95rem;
        line-height: 1.5;
}

.bss-mode-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: 16px;
        padding: 6px 16px;
        border-radius: 999px;
        font-size: 0.8rem;
        font-weight: 600;
}

.bss-mode-badge.bss-mode-test {
        background: var(--bss-warning);
        color: #fff;
}

.bss-mode-badge.bss-mode-demo {
        background: linear-gradient(135deg, #6d28d9 0%, #9333ea 100%);
        color: #fff;
}

.bss-mode-badge.bss-mode-live {
        background: var(--bss-success);
        color: #fff;
}

.bss-mode-badge .dashicons {
        font-size: 14px;
        width: 14px;
        height: 14px;
}

/* Steps indicator */
.bss-steps {
        display: flex;
        justify-content: space-between;
        padding: 24px 32px;
        background: var(--bss-bg-alt);
        border-bottom: 1px solid var(--bss-border);
        gap: 8px;
}

.bss-step {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: var(--bss-text-muted);
        font-weight: 500;
        flex: 1;
}

.bss-step-num {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: #fff;
        border: 2px solid var(--bss-border);
        color: var(--bss-text-muted);
        font-weight: 700;
        font-size: 0.8rem;
        flex-shrink: 0;
        transition: var(--bss-transition);
}

.bss-step.active .bss-step-num {
        background: var(--bss-primary);
        border-color: var(--bss-primary);
        color: #fff;
}

.bss-step.active {
        color: var(--bss-text);
}

@media (max-width: 600px) {
        .bss-steps {
                padding: 16px;
        }
        .bss-step {
                font-size: 0;
                gap: 0;
                justify-content: center;
        }
        .bss-step-num {
                width: 32px;
                height: 32px;
        }
}

/* Step panels */
.bss-step-panel {
        display: none;
        padding: 32px;
}

.bss-step-panel.active {
        display: block;
        animation: bss-fade 0.3s ease;
}

@keyframes bss-fade {
        from { opacity: 0; transform: translateY(8px); }
        to { opacity: 1; transform: translateY(0); }
}

/* Fields */
.bss-field-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin-bottom: 20px;
}

.bss-field {
        margin-bottom: 20px;
        position: relative;
}

.bss-field label {
        display: block;
        margin-bottom: 6px;
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--bss-text);
}

.bss-required {
        color: var(--bss-error);
}

.bss-field input[type="text"],
.bss-field input[type="email"],
.bss-field input[type="url"],
.bss-field textarea,
.bss-field select {
        width: 100%;
        padding: 10px 14px;
        border: 1.5px solid var(--bss-border);
        border-radius: var(--bss-radius-sm);
        font-size: 0.95rem;
        color: var(--bss-text);
        background: #fff;
        transition: var(--bss-transition);
        font-family: inherit;
}

.bss-field input:focus,
.bss-field textarea:focus,
.bss-field select:focus {
        outline: none;
        border-color: var(--bss-primary);
        box-shadow: 0 0 0 3px var(--bss-primary-light);
}

.bss-field textarea {
        resize: vertical;
        min-height: 100px;
}

.bss-char-count {
        position: absolute;
        bottom: 6px;
        right: 12px;
        font-size: 0.75rem;
        color: var(--bss-text-muted);
}

.bss-field-hint {
        font-size: 0.8rem;
        color: var(--bss-text-muted);
        margin-top: 4px;
}

@media (max-width: 600px) {
        .bss-field-row {
                grid-template-columns: 1fr;
                gap: 0;
        }
        .bss-step-panel {
                padding: 20px;
        }
}

/* Upload zones */
.bss-upload-zone {
        position: relative;
        border: 2px dashed var(--bss-border);
        border-radius: var(--bss-radius-sm);
        padding: 32px 20px;
        text-align: center;
        cursor: pointer;
        transition: var(--bss-transition);
        background: var(--bss-bg-alt);
        overflow: hidden;
        min-height: 160px;
}

/*
 * The native file input is positioned to cover the ENTIRE upload zone
 * with opacity: 0. This is the most reliable cross-browser technique —
 * clicking anywhere on the zone natively opens the file picker (no JS
 * required for the click), and the change event fires reliably in every
 * modern browser.
 *
 * We deliberately do NOT use:
 *   - display:none / hidden attribute (some browsers won't fire change)
 *   - clip: rect(0,0,0,0) + pointer-events:none (change event can be
 *     unreliable when the input is interacted with this way)
 */
.bss-file-input {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        opacity: 0;
        cursor: pointer;
        z-index: 5;
        margin: 0;
        padding: 0;
        border: 0;
}

.bss-upload-inner {
        position: relative;
        z-index: 1;
        pointer-events: none;
}

.bss-upload-zone:hover,
.bss-upload-zone.dragover {
        border-color: var(--bss-primary);
        background: var(--bss-primary-light);
}

.bss-upload-icon {
        font-size: 36px;
        width: 36px;
        height: 36px;
        color: var(--bss-primary);
        margin-bottom: 8px;
}

.bss-upload-text {
        margin: 0 0 4px;
        font-weight: 600;
        font-size: 0.9rem;
}

.bss-upload-hint {
        margin: 0;
        font-size: 0.78rem;
        color: var(--bss-text-muted);
}

.bss-upload-preview {
        position: absolute;
        inset: 0;
        background: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--bss-radius-sm);
        overflow: hidden;
        z-index: 10;
}

.bss-upload-preview img {
        max-width: 100%;
        max-height: 200px;
        object-fit: contain;
}

.bss-file-preview {
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 14px 18px;
        background: #fff;
        border-radius: var(--bss-radius-sm);
        border: 1px solid #a7f3d0;
        z-index: 10;
        overflow: hidden;
}

.bss-file-preview .dashicons {
        font-size: 24px;
        color: var(--bss-success);
        flex-shrink: 0;
}

.bss-file-name {
        flex: 1;
        font-size: 0.85rem;
        word-break: break-all;
}

.bss-remove-upload {
        background: rgba(0, 0, 0, 0.1);
        border: none;
        border-radius: 50%;
        width: 24px;
        height: 24px;
        cursor: pointer;
        font-size: 16px;
        line-height: 1;
        color: var(--bss-text);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--bss-transition);
        position: relative;
        z-index: 11;
}

.bss-remove-upload:hover {
        background: var(--bss-error);
        color: #fff;
}

/* Visible status / diagnostic message shown inside the upload zone */
.bss-upload-status {
        position: relative;
        z-index: 12;
        display: none;
        margin-top: 10px;
        padding: 6px 12px;
        font-size: 0.8rem;
        border-radius: 6px;
        background: rgba(255, 255, 255, 0.9);
}

.bss-upload-status.bss-status-error {
        background: var(--bss-error-light);
        color: #991b1b;
        display: block;
}

.bss-upload-status.bss-status-info {
        background: var(--bss-primary-light);
        color: var(--bss-primary);
        display: block;
}

.bss-upload-status.bss-status-success {
        background: var(--bss-success-light);
        color: #065f46;
        display: block;
}

.bss-upload-loading {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        color: var(--bss-primary);
        font-size: 0.85rem;
}

/* Source toggle */
.bss-source-toggle {
        display: flex;
        gap: 12px;
        margin-bottom: 12px;
}

.bss-toggle-label {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 16px;
        border: 1.5px solid var(--bss-border);
        border-radius: var(--bss-radius-sm);
        cursor: pointer;
        font-size: 0.85rem;
        font-weight: 500;
        transition: var(--bss-transition);
        margin-bottom: 0;
}

.bss-toggle-label:has(input:checked) {
        border-color: var(--bss-primary);
        background: var(--bss-primary-light);
        color: var(--bss-primary);
}

/* Payment summary */
.bss-payment-summary {
        background: var(--bss-bg-alt);
        border: 1px solid var(--bss-border);
        border-radius: var(--bss-radius-sm);
        padding: 20px;
        margin-bottom: 20px;
}

.bss-payment-summary h3 {
        margin: 0 0 16px;
        font-size: 1rem;
        font-weight: 700;
}

.bss-summary-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 6px 0;
        font-size: 0.9rem;
}

.bss-summary-total {
        border-top: 1px solid var(--bss-border);
        margin-top: 8px;
        padding-top: 14px;
        font-size: 1.05rem;
        font-weight: 700;
}

.bss-test-card-info,
.bss-live-card-info {
        display: flex;
        align-items: flex-start;
        gap: 8px;
        padding: 12px 16px;
        border-radius: var(--bss-radius-sm);
        font-size: 0.85rem;
        margin-bottom: 20px;
        line-height: 1.5;
}

.bss-test-card-info {
        background: #fef3c7;
        color: #92400e;
        border: 1px solid #fde68a;
}

.bss-live-card-info {
        background: var(--bss-success-light);
        color: #065f46;
        border: 1px solid #a7f3d0;
}

.bss-test-card-info .dashicons,
.bss-live-card-info .dashicons,
.bss-demo-info .dashicons {
        font-size: 16px;
        flex-shrink: 0;
        margin-top: 1px;
}

/* Demo mode info box */
.bss-demo-info {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 18px 20px;
        border-radius: var(--bss-radius-sm);
        font-size: 0.88rem;
        line-height: 1.6;
        margin-bottom: 20px;
        background: linear-gradient(135deg, var(--bss-primary-light) 0%, #f3e8ff 100%);
        color: #4c1d95;
        border: 1px solid #c4b5fd;
}

.bss-demo-info .dashicons {
        font-size: 22px;
        color: var(--bss-primary);
        margin-top: 1px;
}

.bss-demo-info strong {
        display: block;
        margin-bottom: 4px;
        font-size: 0.95rem;
}

/* Stripe card element */
.bss-card-element {
        padding: 14px 16px;
        border: 1.5px solid var(--bss-border);
        border-radius: var(--bss-radius-sm);
        background: #fff;
        transition: var(--bss-transition);
        min-height: 56px;
}

.bss-card-element.StripeElement--focus {
        border-color: var(--bss-primary);
        box-shadow: 0 0 0 3px var(--bss-primary-light);
}

.bss-card-errors {
        margin-top: 8px;
        font-size: 0.85rem;
        color: var(--bss-error);
        min-height: 20px;
}

/* Buttons */
.bss-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 24px;
        border: none;
        border-radius: var(--bss-radius-sm);
        font-size: 0.95rem;
        font-weight: 600;
        cursor: pointer;
        transition: var(--bss-transition);
        text-decoration: none;
        font-family: inherit;
        line-height: 1.4;
}

.bss-btn:disabled {
        opacity: 0.6;
        cursor: not-allowed;
}

.bss-btn-primary {
        background: var(--bss-primary);
        color: #fff;
}

.bss-btn-primary:hover:not(:disabled) {
        background: var(--bss-primary-hover);
        transform: translateY(-1px);
        box-shadow: var(--bss-shadow-lg);
}

.bss-btn-ghost {
        background: transparent;
        color: var(--bss-text-muted);
        border: 1.5px solid var(--bss-border);
}

.bss-btn-ghost:hover {
        background: var(--bss-bg-alt);
        color: var(--bss-text);
}

.bss-btn-disabled {
        background: var(--bss-bg-alt);
        color: var(--bss-text-muted);
        cursor: not-allowed;
}

.bss-form-nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: 28px;
        gap: 12px;
}

.bss-form-nav .bss-btn-primary {
        margin-left: auto;
}

/* Spinner */
.bss-spinner {
        width: 18px;
        height: 18px;
        border: 2.5px solid rgba(255, 255, 255, 0.4);
        border-top-color: #fff;
        border-radius: 50%;
        animation: bss-spin 0.7s linear infinite;
        display: inline-block;
}

@keyframes bss-spin {
        to { transform: rotate(360deg); }
}

/* Success state */
.bss-success-state {
        text-align: center;
        padding: 40px 20px;
}

.bss-success-icon {
        width: 72px;
        height: 72px;
        border-radius: 50%;
        background: var(--bss-success-light);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
}

.bss-success-icon .dashicons {
        font-size: 40px;
        width: 40px;
        height: 40px;
        color: var(--bss-success);
}

.bss-success-state h3 {
        margin: 0 0 8px;
        font-size: 1.4rem;
}

.bss-success-message {
        color: var(--bss-text-muted);
        margin-bottom: 24px;
}

/* Notices */
.bss-notice {
        padding: 14px 18px;
        border-radius: var(--bss-radius-sm);
        margin-bottom: 16px;
        font-size: 0.9rem;
}

.bss-notice-error {
        background: var(--bss-error-light);
        color: #991b1b;
        border: 1px solid #fecaca;
}

/* ---------- Books Display ---------- */

.bss-books-wrap {
        max-width: 1200px;
        margin: 0 auto;
}

.bss-books-grid {
        display: grid;
        gap: 24px;
}

.bss-books-grid.bss-cols-1 { grid-template-columns: 1fr; }
.bss-books-grid.bss-cols-2 { grid-template-columns: repeat(2, 1fr); }
.bss-books-grid.bss-cols-3 { grid-template-columns: repeat(3, 1fr); }
.bss-books-grid.bss-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
        .bss-books-grid.bss-cols-4 { grid-template-columns: repeat(2, 1fr); }
        .bss-books-grid.bss-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
        .bss-books-grid {
                grid-template-columns: 1fr !important;
        }
}

.bss-book-card {
        background: var(--bss-bg);
        border: 1px solid var(--bss-border);
        border-radius: var(--bss-radius);
        overflow: hidden;
        box-shadow: var(--bss-shadow);
        transition: var(--bss-transition);
        display: flex;
        flex-direction: column;
}

.bss-book-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--bss-shadow-lg);
        border-color: var(--bss-primary);
}

.bss-book-cover {
        width: 100%;
        aspect-ratio: 3 / 4;
        overflow: hidden;
        background: var(--bss-bg-alt);
        display: flex;
        align-items: center;
        justify-content: center;
}

.bss-book-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.3s ease;
}

.bss-book-card:hover .bss-book-cover img {
        transform: scale(1.05);
}

.bss-cover-fallback {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        padding: 20px;
        text-align: center;
        color: var(--bss-text-muted);
}

.bss-cover-fallback .dashicons {
        font-size: 48px;
        width: 48px;
        height: 48px;
        opacity: 0.4;
}

.bss-cover-title {
        font-size: 0.8rem;
        font-weight: 600;
        line-height: 1.3;
}

.bss-book-content {
        padding: 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
}

.bss-book-title {
        margin: 0 0 10px;
        font-size: 1.1rem;
        font-weight: 700;
        line-height: 1.3;
        color: var(--bss-text);
}

.bss-book-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin-bottom: 10px;
        font-size: 0.82rem;
        color: var(--bss-text-muted);
}

.bss-book-meta span {
        display: inline-flex;
        align-items: center;
        gap: 4px;
}

.bss-book-meta .dashicons {
        font-size: 14px;
        width: 14px;
        height: 14px;
        opacity: 0.7;
}

.bss-book-isbn {
        font-size: 0.8rem;
        margin-bottom: 10px;
        color: var(--bss-text-muted);
}

.bss-book-isbn code {
        background: var(--bss-bg-alt);
        padding: 2px 6px;
        border-radius: 4px;
        font-size: 0.78rem;
        color: var(--bss-primary);
}

.bss-book-desc {
        font-size: 0.88rem;
        line-height: 1.6;
        color: var(--bss-text-muted);
        margin: 0 0 12px;
        flex: 1;
}

.bss-read-more {
        background: none;
        border: none;
        color: var(--bss-primary);
        font-size: 0.82rem;
        font-weight: 600;
        cursor: pointer;
        padding: 0;
        margin-bottom: 12px;
}

.bss-read-more:hover {
        text-decoration: underline;
}

.bss-full-desc {
        font-size: 0.88rem;
        line-height: 1.6;
        color: var(--bss-text-muted);
        margin-bottom: 12px;
        padding: 12px;
        background: var(--bss-bg-alt);
        border-radius: var(--bss-radius-sm);
}

.bss-download-btn {
        width: 100%;
        margin-top: auto;
}

.bss-download-btn .dashicons {
        font-size: 16px;
        width: 16px;
        height: 16px;
}

/* Empty state */
.bss-empty-state {
        text-align: center;
        padding: 60px 20px;
        color: var(--bss-text-muted);
}

.bss-empty-state .dashicons {
        font-size: 56px;
        width: 56px;
        height: 56px;
        opacity: 0.3;
        margin-bottom: 16px;
}

.bss-empty-state h3 {
        margin: 0 0 8px;
        color: var(--bss-text);
        font-size: 1.2rem;
}

/* Pagination */
.bss-pagination {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 6px;
        margin-top: 32px;
}

.bss-page {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 40px;
        height: 40px;
        padding: 0 12px;
        border: 1px solid var(--bss-border);
        border-radius: var(--bss-radius-sm);
        background: #fff;
        color: var(--bss-text);
        font-size: 0.9rem;
        font-weight: 600;
        text-decoration: none;
        transition: var(--bss-transition);
}

.bss-page:hover {
        border-color: var(--bss-primary);
        color: var(--bss-primary);
}

.bss-page.bss-page-current {
        background: var(--bss-primary);
        border-color: var(--bss-primary);
        color: #fff;
}