/* ═══════════════════════════════════════════════════════
   DPDF – Download PDF Plugin — Frontend Styles (Grayscale)
   ═══════════════════════════════════════════════════════ */

:root {
    --dpdf-primary:      #222222;
    --dpdf-primary-hover:#000000;
    --dpdf-text:         #1a1a1a;
    --dpdf-text-muted:   #6b7280;
    --dpdf-border:       #d1d5db;
    --dpdf-bg:           #f5f5f5;
    --dpdf-white:        #ffffff;
    --dpdf-success:      #16a34a;
    --dpdf-error:        #dc2626;
    --dpdf-shadow-sm:    0 1px 4px rgba(0,0,0,.08);
    --dpdf-shadow-md:    0 4px 20px rgba(0,0,0,.12);
    --dpdf-radius:       8px;
    --dpdf-transition:   .15s ease;
}

/* ── List layout (inline / stacked rows) ── */
.dpdf-wrapper { font-family: inherit; }

.dpdf-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 16px 0;
}

/* ── Card (horizontal row) ── */
.dpdf-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--dpdf-white);
    border-bottom: 1px solid var(--dpdf-border);
    transition: background var(--dpdf-transition);
}
.dpdf-card:last-child { border-bottom: none; }
.dpdf-card:hover { background: var(--dpdf-bg); }

.dpdf-card-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dpdf-bg);
    border: 1px solid var(--dpdf-border);
    border-radius: 6px;
    position: relative;
}
.dpdf-card-icon svg {
    width: 20px;
    height: 20px;
    color: var(--dpdf-text-muted);
}
.dpdf-badge {
    display: none; /* hidden in list view */
}

.dpdf-card-body {
    flex: 1;
    min-width: 0;
}
.dpdf-card-title {
    margin: 0 0 2px;
    font-size: .95rem;
    font-weight: 600;
    color: var(--dpdf-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.dpdf-card-desc {
    margin: 0;
    font-size: .8rem;
    color: var(--dpdf-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dpdf-card-footer { flex-shrink: 0; }

/* ── Button ── */
.dpdf-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    font-size: .82rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--dpdf-transition);
    border: 1px solid var(--dpdf-border);
    outline: none;
    background: var(--dpdf-white);
    color: var(--dpdf-text);
}
.dpdf-btn:hover {
    background: var(--dpdf-primary);
    color: var(--dpdf-white);
    border-color: var(--dpdf-primary);
}
.dpdf-btn-primary {
    background: var(--dpdf-primary);
    color: var(--dpdf-white);
    border-color: var(--dpdf-primary);
    width: 100%;
    justify-content: center;
    border-radius: 6px;
    padding: 12px;
    font-size: .95rem;
}
.dpdf-btn-primary:hover {
    background: var(--dpdf-primary-hover);
    border-color: var(--dpdf-primary-hover);
    color: var(--dpdf-white);
}
.dpdf-btn-primary:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.dpdf-empty {
    text-align: center;
    color: var(--dpdf-text-muted);
    padding: 32px;
    font-style: italic;
}

/* ── Overlay ── */
.dpdf-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease;
}
.dpdf-overlay.dpdf-visible {
    opacity: 1;
    pointer-events: all;
}

/* ── Modal ── */
.dpdf-modal {
    background: var(--dpdf-white);
    border-radius: var(--dpdf-radius);
    box-shadow: var(--dpdf-shadow-md);
    width: 100%;
    max-width: 420px;
    position: relative;
    transform: translateY(12px);
    transition: transform .2s ease;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--dpdf-border);
}
.dpdf-overlay.dpdf-visible .dpdf-modal {
    transform: translateY(0);
}

.dpdf-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    background: none;
    border: none;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--dpdf-text-muted);
    border-radius: 4px;
    transition: background var(--dpdf-transition), color var(--dpdf-transition);
}
.dpdf-modal-close:hover { background: var(--dpdf-bg); color: var(--dpdf-text); }

/* ── Modal header (no gradient) ── */
.dpdf-modal-header {
    padding: 24px 24px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}
.dpdf-modal-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--dpdf-bg);
    border: 1px solid var(--dpdf-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.dpdf-modal-icon svg { width: 22px; height: 22px; color: var(--dpdf-text-muted); }
.dpdf-modal-title {
    margin: 0 0 2px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dpdf-text);
}
.dpdf-modal-subtitle {
    margin: 0;
    font-size: .8rem;
    color: var(--dpdf-text-muted);
}

/* ── Form ── */
.dpdf-form {
    padding: 20px 24px 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.dpdf-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.dpdf-field label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--dpdf-text-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
}
.dpdf-field input {
    padding: 9px 12px;
    border: 1px solid var(--dpdf-border);
    border-radius: 6px;
    font-size: .95rem;
    color: var(--dpdf-text);
    background: var(--dpdf-bg);
    transition: border-color var(--dpdf-transition), box-shadow var(--dpdf-transition);
    outline: none;
    width: 100%;
    box-sizing: border-box;
}
.dpdf-field input:focus {
    border-color: var(--dpdf-primary);
    background: var(--dpdf-white);
    box-shadow: 0 0 0 2px rgba(0,0,0,.08);
}
.dpdf-field input::placeholder { color: #c0c4cc; }

/* ── Error ── */
.dpdf-error {
    display: none;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 6px;
    padding: 9px 12px;
    color: var(--dpdf-error);
    font-size: .85rem;
    font-weight: 500;
}
.dpdf-error.dpdf-visible { display: block; }

/* ── Result ── */
.dpdf-result {
    padding: 8px 24px 24px;
    text-align: center;
}
.dpdf-result-icon {
    width: 44px;
    height: 44px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: var(--dpdf-success);
    font-size: 1.4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-weight: 700;
}
.dpdf-result > p {
    color: var(--dpdf-text-muted);
    font-size: .88rem;
    margin: 0 0 12px;
}
.dpdf-result-note {
    margin-top: 10px !important;
    font-size: .78rem !important;
    color: #9ca3af !important;
}
.dpdf-download-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--dpdf-primary);
    color: #fff !important;
    text-decoration: none;
    padding: 10px 24px;
    border-radius: 6px;
    font-weight: 600;
    font-size: .9rem;
    transition: background var(--dpdf-transition);
}
.dpdf-download-link:hover { background: var(--dpdf-primary-hover); }

/* ── Responsive ── */
@media (max-width: 480px) {
    .dpdf-card { flex-wrap: wrap; }
    .dpdf-card-footer { width: 100%; }
    .dpdf-card-footer .dpdf-btn { width: 100%; justify-content: center; }
    .dpdf-modal-header { flex-direction: column; align-items: flex-start; padding-top: 18px; }
    .dpdf-form { padding: 16px 18px; }
    .dpdf-result { padding: 8px 18px 20px; }
}

/* ── Book Layout ── */
.dpdf-book-card {
    display: flex;
    flex-wrap: wrap; /* for mobile */
    gap: 20px;
    padding: 24px;
    background: var(--dpdf-white);
    border: 1px solid var(--dpdf-border);
    border-radius: var(--dpdf-radius);
    transition: background var(--dpdf-transition);
}
.dpdf-book-card:hover { background: var(--dpdf-bg); }

.dpdf-book-cover {
    flex-shrink: 0;
    width: 150px;
}
.dpdf-book-cover img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: var(--dpdf-shadow-md);
    display: block;
}

.dpdf-book-content {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
}

.dpdf-book-title {
    margin: 0 0 8px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dpdf-text);
}

.dpdf-book-desc {
    margin: 0 0 16px;
    font-size: 0.95rem;
    color: var(--dpdf-text-muted);
    line-height: 1.5;
}

.dpdf-book-actions {
    margin-top: auto; /* Push to bottom */
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.dpdf-btn-amazon {
    background: #ff9900;
    color: #000;
    border-color: #ff9900;
}
.dpdf-btn-amazon:hover {
    background: #e68a00;
    color: #000;
    border-color: #e68a00;
}

.dpdf-badge-soon {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dpdf-text-muted);
    background: var(--dpdf-bg);
    border: 1px dashed #d1d5db;
    border-radius: 6px;
}

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

@media (max-width: 600px) {
    .dpdf-book-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .dpdf-book-actions {
        justify-content: center;
    }
}