/* ═══════════════════════════════════════════
   JPG TO PDF CONVERTER — Tool-Specific Styles
   Premium glassmorphic design with animations
   ═══════════════════════════════════════════ */

/* ── Drop Zone ── */
.drop-zone {
    border: 2px dashed var(--card-border);
    border-radius: var(--radius-lg);
    padding: 52px 28px;
    text-align: center;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 40%, rgba(99, 102, 241, 0.06), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

.drop-zone::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.02), transparent);
    transition: left 0.6s ease;
}

.drop-zone:hover::after {
    left: 100%;
}

.drop-zone:hover,
.drop-zone:focus-visible {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.04);
    box-shadow: 0 0 0 3px var(--primary-glow), var(--shadow-md);
    outline: none;
    transform: translateY(-2px);
}

.drop-zone:hover::before {
    opacity: 1;
}

.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(139, 92, 246, 0.1);
    transform: scale(1.02);
    box-shadow: 0 0 40px var(--accent-glow), 0 0 0 3px var(--accent-glow);
}

.drop-zone-content {
    position: relative;
    z-index: 1;
}

.drop-zone-svg {
    width: 60px;
    height: 60px;
    color: var(--primary);
    margin-bottom: 16px;
    opacity: 0.65;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s;
    filter: drop-shadow(0 2px 8px var(--primary-glow));
}

.drop-zone:hover .drop-zone-svg {
    transform: translateY(-6px) scale(1.05);
    opacity: 1;
}

.drop-zone.dragover .drop-zone-svg {
    transform: translateY(-10px) scale(1.1);
    opacity: 1;
    color: var(--accent);
}

.drop-zone-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

.drop-zone-browse {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.drop-zone-browse::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1.5px;
    background: var(--gradient);
    border-radius: 1px;
}

.drop-zone-hint {
    font-size: 0.8rem;
    color: var(--text-subtle);
    margin-top: 2px;
}

/* ── Preview Section ── */
.preview-section {
    margin-top: 24px;
    animation: jpgFadeIn 0.35s ease-out;
}

@keyframes jpgFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.image-count {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.2px;
}

.preview-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: inherit;
}

.add-btn {
    color: var(--primary);
}

.add-btn:hover {
    background: rgba(99, 102, 241, 0.12);
    border-color: var(--primary);
    box-shadow: 0 2px 8px var(--primary-glow);
    transform: translateY(-1px);
}

.clear-btn {
    color: var(--danger);
}

.clear-btn:hover {
    background: var(--danger-bg);
    border-color: var(--danger);
    transform: translateY(-1px);
}

/* ── Preview Grid ── */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius);
    overflow: hidden;
    border: 2px solid var(--border);
    cursor: grab;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-surface);
    animation: jpgItemIn 0.3s ease-out backwards;
}

.preview-item:nth-child(1) {
    animation-delay: 0s;
}

.preview-item:nth-child(2) {
    animation-delay: 0.04s;
}

.preview-item:nth-child(3) {
    animation-delay: 0.08s;
}

.preview-item:nth-child(4) {
    animation-delay: 0.12s;
}

.preview-item:nth-child(5) {
    animation-delay: 0.16s;
}

.preview-item:nth-child(6) {
    animation-delay: 0.20s;
}

.preview-item:nth-child(n+7) {
    animation-delay: 0.24s;
}

@keyframes jpgItemIn {
    from {
        opacity: 0;
        transform: scale(0.85);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.preview-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.2);
    transform: translateY(-3px) scale(1.02);
}

.preview-item.dragging {
    opacity: 0.35;
    transform: scale(0.92) rotate(2deg);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.preview-item:hover .preview-img {
    transform: scale(1.05);
}

.preview-number {
    position: absolute;
    top: 5px;
    left: 5px;
    width: 22px;
    height: 22px;
    background: var(--gradient);
    color: white;
    font-size: 0.68rem;
    font-weight: 800;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    z-index: 2;
}

.remove-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 24px;
    height: 24px;
    background: rgba(10, 10, 26, 0.7);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 50%;
    font-size: 0.95rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.25s ease;
    backdrop-filter: blur(6px);
    z-index: 2;
}

.preview-item:hover .remove-btn {
    opacity: 1;
}

.remove-btn:hover {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
    transform: scale(1.15);
}

/* ── Advanced Options (collapsible) ── */
.advanced-options {
    margin-top: 20px;
    animation: jpgFadeIn 0.3s ease-out;
}

.advanced-toggle {
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-subtle);
    padding: 10px 14px;
    list-style: none;
    transition: all 0.25s ease;
    user-select: none;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
}

.advanced-toggle::-webkit-details-marker {
    display: none;
}

.advanced-toggle::after {
    content: '▸';
    display: inline-block;
    transition: transform 0.25s ease;
    font-size: 0.75rem;
}

.advanced-options[open] .advanced-toggle::after {
    transform: rotate(90deg);
}

.advanced-toggle:hover {
    color: var(--text-main);
    border-color: var(--card-border);
    background: rgba(99, 102, 241, 0.05);
}

.advanced-body {
    margin-top: 14px;
    padding: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 16px;
    animation: jpgFadeIn 0.25s ease-out;
}

.advanced-body .form-group {
    margin-bottom: 0;
}

/* ── Preview Hint ── */
.preview-hint {
    font-size: 0.75rem;
    color: var(--text-subtle);
    text-align: center;
    margin-top: 10px;
    opacity: 0.7;
}

/* ── Filename Input ── */
.filename-section {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    animation: jpgFadeIn 0.3s ease-out;
}

.filename-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.filename-input-wrap {
    display: flex;
    align-items: center;
    flex: 1;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.25s, box-shadow 0.25s;
    overflow: hidden;
}

.filename-input-wrap:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.filename-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 8px 12px;
    color: var(--text-bright);
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    outline: none;
    min-width: 0;
}

.filename-ext {
    padding: 8px 12px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--text-subtle);
    font-size: 0.85rem;
    font-weight: 600;
    border-left: 1px solid var(--border);
    user-select: none;
}

/* ── Progress Bar ── */
.progress-section {
    margin-top: 18px;
    animation: jpgFadeIn 0.3s ease-out;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.progress-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
}

.progress-percent {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

.progress-track {
    width: 100%;
    height: 6px;
    background: var(--bg-surface);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.progress-fill {
    height: 100%;
    background: var(--gradient);
    border-radius: 10px;
    transition: width 0.3s ease-out;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    animation: jpgShimmer 1.5s infinite;
}

@keyframes jpgShimmer {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(100%);
    }
}

/* ── Toggle Switch (Invert Colors) ── */
.toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    gap: 12px;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

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

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: var(--text-subtle);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toggle-switch input:checked+.toggle-slider {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.toggle-switch input:checked+.toggle-slider::after {
    transform: translateX(20px);
    background: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ── Download Section ── */
.download-section {
    margin-top: 28px;
    animation: jpgSlideUp 0.5s ease-out;
}

@keyframes jpgSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.download-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--success);
    border-radius: var(--radius-lg);
    box-shadow: 0 0 30px rgba(34, 197, 94, 0.08), 0 0 60px rgba(34, 197, 94, 0.04);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 30%, rgba(34, 197, 94, 0.06), transparent 70%);
}

/* ── Animated SVG Checkmark ── */
.animated-check {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    position: relative;
}

.checkmark-svg {
    width: 56px;
    height: 56px;
}

.checkmark-circle {
    stroke: var(--success);
    stroke-width: 2;
    stroke-dasharray: 150;
    stroke-dashoffset: 150;
    animation: jpgCircleDraw 0.6s ease forwards;
}

@keyframes jpgCircleDraw {
    to {
        stroke-dashoffset: 0;
    }
}

.checkmark-path {
    stroke: var(--success);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 50;
    stroke-dashoffset: 50;
    animation: jpgCheckDraw 0.4s 0.4s ease forwards;
}

@keyframes jpgCheckDraw {
    to {
        stroke-dashoffset: 0;
    }
}

.download-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--success);
    margin-bottom: 18px;
    position: relative;
}

/* ── Download Buttons ── */
.download-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

.download-btn {
    display: inline-flex;
    position: relative;
    animation: jpgPulse 2.5s ease-in-out infinite;
}

@keyframes jpgPulse {

    0%,
    100% {
        box-shadow: 0 4px 15px var(--primary-glow);
    }

    50% {
        box-shadow: 0 6px 30px var(--primary-glow), 0 0 50px var(--primary-glow);
    }
}

.download-btn-compressed {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    background: var(--bg-surface);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.download-btn-compressed:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    box-shadow: 0 2px 12px var(--primary-glow);
    transform: translateY(-2px);
}

.download-size {
    margin-top: 14px;
    font-size: 0.78rem;
    color: var(--text-subtle);
    position: relative;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .drop-zone {
        padding: 40px 20px;
    }
}

@media (max-width: 480px) {
    .drop-zone {
        padding: 32px 16px;
    }

    .drop-zone-svg {
        width: 48px;
        height: 48px;
    }

    .preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(78px, 1fr));
        gap: 6px;
    }

    .advanced-body {
        grid-template-columns: 1fr;
    }

    .preview-item:hover {
        transform: none;
    }

    .filename-section {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }
}