* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

    /*  body {
    font-family:
        -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
        sans-serif;
    background: #f3f3f3;
    min-height: 100vh;
    padding: 40px 20px;
    color: #292929;
}
 */
 
.container {
    max-width: 920px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    border: 1px solid rgba(199, 199, 199, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.header {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(199, 199, 199, 0.5);
    padding: 48px 40px;
    text-align: center;
}

.header h1 {
    font-size: 2.75rem;
    font-weight: 600;
    letter-spacing: -0.022em;
    margin-bottom: 12px;
    color: #780000;
    line-height: 1.1;
}

.header p {
    font-size: 1.1875rem;
    font-weight: 400;
    color: #6b6b6b;
    margin-bottom: 0;
    line-height: 1.5;
    letter-spacing: -0.008em;
}

.main-content {
    padding: 40px;
}

.drop-zone {
    border: 2px dashed #a30000;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    background: rgba(224, 224, 224, 0.3);
    backdrop-filter: blur(4px);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.drop-zone:hover {
    border-color: #780000;
    background: rgba(163, 0, 0, 0.1);
    box-shadow: 0 8px 20px rgba(120, 0, 0, 0.1);
}

.drop-zone.drag-over {
    border-color: #780000;
    background: rgba(120, 0, 0, 0.1);
    transform: translateY(-2px) scale(1.01);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%,
    100% {
        border-color: #780000;
    }
    50% {
        border-color: #a30000;
    }
}

.drop-zone-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 4rem;
    font-weight: 300;
    color: #780000;
    margin-bottom: 20px;
    opacity: 0.8;
    font-family:
        -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif;
}

.drop-zone h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #780000;
    margin-bottom: 8px;
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.drop-zone p {
    color: #6b6b6b;
    font-size: 1.0625rem;
    margin-bottom: 28px;
    font-weight: 400;
    line-height: 1.4;
}

.file-input {
    display: none;
}

.browse-btn {
    background: #780000;
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    margin: 6px;
    letter-spacing: -0.005em;
    line-height: 1.2;
}

.browse-btn:hover {
    background: #600000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(120, 0, 0, 0.3);
}

.browse-btn:active {
    transform: scale(0.98);
}

.settings-panel {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 32px;
    margin-top: 40px;
    border: 1px solid rgba(199, 199, 199, 0.5);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.settings-title {
    font-size: 1.4375rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: #780000;
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.setting-item {
    display: flex;
    flex-direction: column;
}

.setting-item label {
    font-weight: 500;
    margin-bottom: 8px;
    color: #525252;
    font-size: 0.9375rem;
    letter-spacing: -0.005em;
    line-height: 1.4;
}

.setting-item input,
.setting-item select {
    padding: 12px 16px;
    border: 1px solid #c7c7c7;
    border-radius: 8px;
    font-size: 0.9375rem;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    line-height: 1.4;
    color: #292929;
}

.quality-control {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quality-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.quality-btn {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid #c7c7c7;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: #525252;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    flex: 1;
    min-width: 80px;
}

.quality-btn:hover {
    background: rgba(120, 0, 0, 0.1);
    border-color: #a30000;
    color: #780000;
}

.quality-btn.active {
    background: #780000;
    border-color: #780000;
    color: white;
}

.quality-custom {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-label {
    font-size: 0.8125rem !important;
    font-weight: 500 !important;
    color: #525252 !important;
    margin-bottom: 0 !important;
}

.quality-input {
    width: 70px !important;
    padding: 6px 8px !important;
    text-align: center;
}

.quality-display {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #780000;
    min-width: 40px;
}

/* New preset system styles */
.preset-section {
    margin-bottom: 32px;
}

.preset-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: #525252;
    margin-bottom: 12px;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.preset-btn {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid #c7c7c7;
    border-radius: 12px;
    padding: 16px 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    text-align: center;
}

.preset-btn:hover {
    background: rgba(120, 0, 0, 0.05);
    border-color: #a30000;
    transform: translateY(-2px);
}

.preset-btn.active {
    background: #780000;
    border-color: #780000;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(120, 0, 0, 0.3);
}

.preset-name {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.preset-desc {
    font-size: 0.75rem;
    opacity: 0.8;
}

.preset-btn.active .preset-desc {
    opacity: 0.9;
}

/* Essential settings */
.essential-settings {
    margin-bottom: 24px;
}

.settings-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 20px;
}

/* Advanced settings collapsible */
.advanced-settings {
    border-top: 1px solid rgba(199, 199, 199, 0.3);
    padding-top: 24px;
}

.advanced-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: #525252;
    transition: color 0.3s ease;
}

.advanced-header:hover {
    color: #780000;
}

.advanced-content {
    padding-top: 20px;
}

/* Dimension controls */

.dimension-custom {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dimension-custom input {
    width: 80px !important;
    text-align: center;
}

.dimension-sep {
    font-size: 1rem;
    color: #525252;
    font-weight: 500;
}

/* Checkbox improvements */
.checkbox-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.checkbox-hint {
    display: block;
    font-size: 0.75rem;
    color: #86868b;
    margin-top: 2px;
}

.setting-item input:focus,
.setting-item select:focus {
    outline: none;
    border-color: #a30000;
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 3px rgba(163, 0, 0, 0.1);
}

.checkbox-item {
    display: flex;
    align-items: center;
    margin-top: 20px;
}

.checkbox-item input {
    margin-right: 12px;
    transform: scale(1.2);
    accent-color: #780000;
}

.checkbox-item label {
    font-size: 0.9375rem !important;
    font-weight: 500 !important;
    letter-spacing: -0.005em !important;
}

.progress-container {
    display: none;
    margin-top: 48px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-fill {
    height: 100%;
    background: #780000;
    width: 0%;
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 3px;
}

.progress-text {
    text-align: center;
    font-size: 0.9375rem;
    color: #6b6b6b;
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: -0.005em;
}

.results-container {
    display: none;
    padding: 40px;
}

.result-card {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 32px;
    border: 1px solid rgba(199, 199, 199, 0.5);
    margin-bottom: 24px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.result-card h4 {
    color: #780000;
    margin-bottom: 20px;
    font-size: 1.1875rem;
    font-weight: 600;
    letter-spacing: -0.012em;
    line-height: 1.3;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.9375rem;
    align-items: center;
    line-height: 1.4;
}

.stat-label {
    color: #6b6b6b;
    font-weight: 500;
}

.stat-value {
    font-weight: 600;
    color: #292929;
}

.base64-output {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    margin-top: 32px;
    border: 1px solid rgba(199, 199, 199, 0.5);
}

.base64-header {
    padding: 24px 32px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(199, 199, 199, 0.3);
    transition: background 0.3s ease;
}

.base64-header:hover {
    background: rgba(120, 0, 0, 0.05);
}

.base64-header h4 {
    margin: 0;
    color: #780000;
    font-size: 1.1875rem;
    font-weight: 600;
}

.collapse-btn {
    background: none;
    border: none;
    color: #780000;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.collapse-btn:hover {
    background: rgba(120, 0, 0, 0.1);
}

.collapse-btn.collapsed {
    transform: rotate(180deg);
}

.base64-content {
    padding: 0 32px 32px 32px;
}

.base64-textarea {
    width: 100%;
    height: 160px;
    border: none;
    background: transparent;
    resize: none;
    font-family:
        "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
    font-size: 0.875rem;
    color: #292929;
    line-height: 1.5;
    padding: 4px 0;
}

.base64-textarea:focus {
    outline: none;
}

.copy-btn {
    background: #525252;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 600;
    margin: 6px 6px 6px 0;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    letter-spacing: -0.005em;
    line-height: 1.2;
}

.copy-btn:hover {
    background: #3d3d3d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(61, 61, 61, 0.3);
}

.copy-btn:active {
    transform: scale(0.98);
}

.conversion-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.conversion-btn {
    background: #780000;
    border-color: #780000;
    min-width: 120px;
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    text-align: center;
    letter-spacing: -0.005em;
    line-height: 1.3;
    flex: 1;
    white-space: nowrap;
}

.conversion-btn:hover {
    background: #3d3d3d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(61, 61, 61, 0.3);
}

.conversion-btn:active {
    transform: scale(0.98);
}

.conversion-btn:disabled {
    background: #c7c7c7;
    color: #8a8a8a;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.conversion-results {
    background: rgba(120, 0, 0, 0.05);
    border: 1px solid rgba(120, 0, 0, 0.2);
    border-radius: 12px;
    padding: 32px;
    display: none;
}

.conversion-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.conversion-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.conversion-result-item {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(199, 199, 199, 0.5);
    border-radius: 8px;
    padding: 16px;
    transition: all 0.3s ease;
}

.conversion-result-item:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.conversion-preview {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.conversion-preview:hover {
    transform: scale(1.02);
}

.conversion-info {
    font-size: 0.8125rem;
    color: #525252;
    line-height: 1.4;
}

.conversion-info strong {
    color: #780000;
    font-weight: 600;
}

.bulk-download-btn {
    background: #780000;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    gap: 8px;
}

.bulk-download-btn:hover {
    background: #600000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(120, 0, 0, 0.3);
}

/* Image preview modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    cursor: pointer;
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.conversion-results h4 {
    color: #780000;
    margin-bottom: 20px;
    font-size: 1.1875rem;
    font-weight: 600;
    letter-spacing: -0.012em;
    line-height: 1.3;
}

.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.download-link {
    background: #780000;
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    letter-spacing: -0.005em;
    line-height: 1.2;
}

.download-link:hover {
    background: #600000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(120, 0, 0, 0.3);
}

.base64-selector {
    margin-bottom: 24px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    border-radius: 8px;
}

.base64-selector label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #525252;
    font-size: 0.9375rem;
    letter-spacing: -0.005em;
    line-height: 1.4;
}

.base64-selector select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #c7c7c7;
    border-radius: 8px;
    font-size: 0.9375rem;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    line-height: 1.4;
    color: #292929;
}

.base64-selector select:focus {
    outline: none;
    border-color: #a30000;
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 3px rgba(163, 0, 0, 0.1);
}

.base64-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.error-message {
    background: rgba(163, 0, 0, 0.1);
    border: 1px solid rgba(120, 0, 0, 0.3);
    border-left: 4px solid #780000;
    color: #ff9999;
    padding: 20px;
    border-radius: 8px;
    margin-top: 24px;
    display: none;
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.4;
}

.loading-spinner {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid #780000;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 24px auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    body {
        padding: 16px 12px;
    }
    .container {
        margin: 0;
        border-radius: 12px;
    }
    .header {
        padding: 24px 20px;
    }
    .header h1 {
        font-size: 2rem;
    }
    .header p {
        font-size: 1rem;
    }
    .main-content {
        padding: 24px 20px;
    }
    .drop-zone {
        padding: 48px 20px;
    }
    .drop-zone h3 {
        font-size: 1.25rem;
    }
    .drop-zone p {
        font-size: 1rem;
    }
    .upload-icon {
        font-size: 3rem;
        margin-bottom: 16px;
    }
    .settings-panel {
        padding: 24px 20px;
        margin-top: 24px;
        border-radius: 12px;
    }
    .settings-title {
        font-size: 1.25rem;
        margin-bottom: 20px;
    }
    .settings-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .conversion-buttons {
        flex-direction: column;
        gap: 8px;
    }
    .base64-output {
        padding: 20px;
        border-radius: 8px;
    }
    .result-card {
        padding: 20px;
        border-radius: 8px;
    }
    .base64-textarea {
        height: 120px;
        font-size: 0.8125rem;
    }
    .quality-presets {
        flex-direction: column;
        gap: 6px;
    }
    .quality-btn {
        min-width: auto;
    }
    .base64-header {
        padding: 16px 20px;
    }
    .base64-content {
        padding: 0 20px 20px 20px;
    }
    .conversion-results-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .conversion-results-header {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .preset-buttons {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .settings-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .checkbox-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .conversion-control {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 8px !important;
    }
    .conversion-control label {
        min-width: auto !important;
    }
    .conversion-control select {
        max-width: none !important;
    }
}