/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* CSS Variables */
:root {
    --primary: #f06de5;
    --primary-dark: #770968;
    --secondary: #2108ad;
    --success: #11790e;
    --danger: #e74c3c;
    --warning: #f39c12;
    --light: #f8f9fa;
    --dark: #2d3748;
    --gray: #6c757d;
    --border: #e2e8f0;
    --sidebar-bg: #f8fafc;
}

/* Body Styles */
body {
    background: linear-gradient(135deg, #d4aae7 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark);
}

/* Container */
.container {
    max-width: 1300px;
    margin: 0 auto;
}

/* Converter Card */
.converter-card {
    background: rgb(235, 231, 231);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 40px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Main Content Grid */
.main-content {
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* Left and Right Columns */
.left-column {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.right-column {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Upload Area */
.upload-area {
    border: 3px dashed var(--border);
    border-radius: 15px;
    padding: 60px 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--light);
    grid-column: 1 / -1;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background: rgba(67, 97, 238, 0.05);
    transform: translateY(-2px);
}

.upload-icon {
    font-size: 60px;
    margin-bottom: 20px;
    color: var(--primary);
}

.upload-text h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.upload-text p {
    color: var(--gray);
    margin-bottom: 20px;
}

.browse-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    margin-top: 10px;
}

.browse-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.2);
}

.file-info {
    margin-top: 15px;
    color: var(--gray);
    font-size: 0.9rem;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    background-color: var(--border);
    border-radius: 10px;
    margin: 15px 0;
    display: none;
    grid-column: 1 / -1;
}

.progress-bar {
    height: 10px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 10px;
    width: 0%;
    transition: width 0.3s ease;
}

/* Selected Images Section */
.images-section {
    background: rgb(218, 173, 200);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    grid-column: 1 / -1;
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.clear-all {
    background: rgb(237, 238, 245);
    border: 2px solid var(--danger);
    color: var(--danger);
    padding: 8px 20px;
    border-radius: 40px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.clear-all:hover {
    background: var(--danger);

    color: rgb(232, 236, 226);
}

.images-list {
    min-height: 150px;
    border-radius: 10px;
    background: var(--light);
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    max-height: 400px;
    overflow-y: auto;
}

.image-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.image-item:hover {
    transform: translateY(-5px);
}

.image-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.image-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
}

.image-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.9);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 14px;
}

.image-btn:hover {
    background: white;
    transform: scale(1.1);
}

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

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

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

/* Image Counter */
.image-counter {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: rgb(247, 235, 243);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

/* Settings Panel */
.settings-panel {
    background: var(--sidebar-bg);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    height: 100%;
}

.settings-panel h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-panel h3 i {
    color: var(--primary);
}

.setting-group {
    margin-bottom: 25px;
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
}

.setting-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.option-btn {
    padding: 10px 16px;
    border: 2px solid var(--border);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    flex: 1;
    min-width: 80px;
    text-align: center;
}

.option-btn:hover {
    border-color: var(--primary);
}

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

/* Alignment Options */
.alignment-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.align-btn {
    padding: 12px;
    border: 2px solid var(--border);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.align-btn:hover {
    border-color: var(--primary);
}

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

.align-btn i {
    font-size: 18px;
}

/* Slider Styles */
.slider-container {
    padding: 10px 0;
}

.slider-value {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--gray);
}

.slider-value span {
    color: var(--primary);
    font-weight: 600;
}

.slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 6px rgba(67, 97, 238, 0.3);
}

/* Preview Summary */
.preview-summary {
    background: var(--sidebar-bg);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    height: 100%;
}

.preview-summary h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.preview-summary h3 i {
    color: var(--primary);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.stat-box {
    background: white;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    border: 2px solid var(--border);
    transition: all 0.3s ease;
}

.stat-box:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray);
}

.summary-details {
    background: white;
    border-radius: 10px;
    padding: 20px;
    border: 2px solid var(--border);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.detail-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.detail-label {
    color: var(--gray);
    font-size: 0.9rem;
}

.detail-value {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
}

.estimate-note {
    margin-top: 15px;
    font-size: 0.8rem;
    color: var(--gray);
    text-align: center;
    font-style: italic;
}

/* Download Section */
.download-section {
    grid-column: 1 / -1;
    margin-top: 20px;
}

.download-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.download-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 25px;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(4, 182, 34, 0.918);
}

.download-btn.hd {
    background: linear-gradient(135deg, var(--success), #04882c);
}

.download-btn.compressed {
    background: linear-gradient(135deg, #8f2a8f, #9d5ae9);
}

.download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.download-btn i {
    font-size: 28px;
}

.download-btn .btn-subtitle {
    font-size: 0.9rem;
    font-weight: normal;
    opacity: 0.9;
}

/* Loading Styles */
.loading {
    display: none;
    text-align: center;
    padding: 20px;
    grid-column: 1 / -1;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Features Section */
.features {
    background: var(--light);
    border-radius: 15px;
    padding: 30px;
    margin-top: 30px;
    grid-column: 1 / -1;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.feature {
    text-align: center;
    padding: 20px;
}

.feature i {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 15px;
}

.feature h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.feature p {
    color: var(--gray);
    line-height: 1.5;
}

/* Footer Styles */
.footer {
    text-align: center;
    padding: 30px;
    color: white;
    font-size: 0.9rem;
    opacity: 0.9;
}

.footer a {
    color: white;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Toast Messages */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 16px 24px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 350px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast i {
    font-size: 20px;
}

.toast.success i {
    color: var(--success);
}

.toast.error i {
    color: var(--danger);
}

/* Responsive Design */
@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 30px 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .upload-area {
        padding: 40px 20px;
    }
    
    .download-controls {
        grid-template-columns: 1fr;
    }
    
    .images-list {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .summary-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .alignment-options {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .images-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .setting-options {
        flex-direction: column;
    }
    
    .option-btn {
        width: 100%;
    }
    
    .alignment-options {
        grid-template-columns: repeat(3, 1fr);
    }
}