/* ==================== PNG BACKGROUND CHANGER - COMPLETE STYLES ==================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

/* ==================== MAIN CONTAINER ==================== */
.pngbg-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.pngbg-wrapper {
    max-width: 950px;
    margin: 0 auto;
}

/* ==================== HEADER SECTION ==================== */
.pngbg-title {
    font-size: 3rem;
    font-weight: 800;
    font-family: 'Poppins', sans-serif;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

.pngbg-icon {
    font-size: 2.8rem;
    display: inline-block;
    animation: pngbgFloat 3s infinite;
}

@keyframes pngbgFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.pngbg-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    font-family: 'Poppins', sans-serif;
}

/* ==================== MAIN CARD ==================== */
.pngbg-card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ==================== SECTIONS ==================== */
.pngbg-section {
    background: var(--bg);
    border-radius: 12px;
    padding: 1.2rem;
    border: 1px solid var(--border);
}

.pngbg-section-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.8rem;
}

/* ==================== UPLOAD AREA ==================== */
/* #pbgUploadZone doubles as the upload dropzone — id is required by script.js */
#pbgUploadZone {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 2.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

#pbgUploadZone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

#pbgUploadZone.is-dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.pngbg-upload-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.pngbg-upload-content p {
    margin: 0.5rem 0;
    color: var(--text);
    font-size: 0.95rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.pngbg-upload-content small {
    color: var(--text-light);
    font-size: 0.8rem;
}

/* ==================== EDITOR LAYOUT ==================== */
.pngbg-editor-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 1.2rem;
    align-items: start;
}

@media (max-width: 900px) {
    .pngbg-editor-grid {
        grid-template-columns: 1fr;
    }
}

.pngbg-canvas-section {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    position: sticky;
    top: 90;
}

.pngbg-thumb-wrap {
    position: relative;
    width: 100%;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(45deg, #e5e5e5 25%, transparent 25%),
        linear-gradient(-45deg, #e5e5e5 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e5e5e5 75%),
        linear-gradient(-45deg, transparent 75%, #e5e5e5 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 10px;
}

#pbgCanvas {
    max-width: 100%;
    max-height: 460px;
    display: block;
    border-radius: 6px;
}

.pngbg-canvas-actions {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
}

.pngbg-controls-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ==================== TABS (Color / Gradient / Image) ==================== */
.pngbg-tabs {
    display: flex;
    background: var(--surface);
    border-radius: 10px;
    padding: 4px;
    gap: 4px;
    border: 1px solid var(--border);
}

.pbg-tab {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.5rem 0.6rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--text-light);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    font-family: 'Poppins', sans-serif;
}

.pbg-tab.is-active {
    background: var(--primary);
    color: #fff;
}

.pbg-panel {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* ==================== CONTROLS ==================== */
.pngbg-control-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.pngbg-control-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
}

.pngbg-color-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.pngbg-color-row input[type="color"],
.pngbg-control-group input[type="color"] {
    width: 44px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2px;
    cursor: pointer;
    background: var(--surface);
}

.pngbg-hex-input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem 0.7rem;
    font-size: 0.85rem;
    font-family: monospace;
    background: var(--surface);
    color: var(--text);
}

.pngbg-swatches {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.5rem;
}

.pbg-swatch {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,.1);
    cursor: pointer;
    transition: transform 0.15s;
}

.pbg-swatch:hover {
    transform: scale(1.08);
}

.pngbg-select {
    width: 100%;
    padding: 0.5rem 0.8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.85rem;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
}

.pngbg-select:focus {
    outline: none;
    border-color: var(--primary);
}

.pngbg-range {
    width: calc(100% - 50px);
    vertical-align: middle;
    accent-color: var(--primary);
}

.pngbg-range + span {
    display: inline-block;
    width: 45px;
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-light);
}

.pngbg-bg-filename {
    font-size: 0.75rem;
    color: var(--text-light);
    margin: 0.4rem 0 0;
    word-break: break-all;
}

.pngbg-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0.2rem 0;
}

/* ==================== FORMAT ROW ==================== */
.pngbg-format-row {
    display: flex;
    gap: 0.5rem;
}

.pbg-format-btn {
    flex: 1;
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
}

.pbg-format-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.pbg-format-btn.is-active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ==================== BUTTONS ==================== */
.pngbg-primary-btn {
    padding: 0.7rem 1.5rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    white-space: nowrap;
}

.pngbg-primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.pngbg-action-btn {
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
    white-space: nowrap;
}

.pngbg-action-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.pngbg-block-btn {
    width: 100%;
}

.pngbg-download-btn {
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
}

/* ==================== FOOTER NOTE ==================== */
.pngbg-footer-note {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-light);
}

.pngbg-footer-note p {
    margin: 0.3rem 0;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
    .pngbg-container {
        padding: 0 1rem;
    }

    .pngbg-title {
        font-size: 2rem;
    }

    .pngbg-card {
        padding: 1rem;
    }

    .pngbg-swatches {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (max-width: 480px) {
    .pngbg-title {
        font-size: 1.5rem;
    }

    .pngbg-swatches {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.pngbg-select:focus-visible,
.pngbg-primary-btn:focus-visible,
.pngbg-action-btn:focus-visible,
.pbg-format-btn:focus-visible,
.pbg-tab:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}