:root {
    --bg-color: #f5f7fa;
    --text-color: #333333;
    --surface-color: #ffffff;
    --border-color: #dddddd;
    --dropzone-border: #bbbbbb;
    --primary-color: #3498db;
    --primary-hover: #2980b9;
    --secondary-text: #555555;
    --dropzone-bg-hover: #ecf0f1;
    --success-color: #2ecc71;
    
    /* Dropdown UI */
    --accent-color: var(--primary-color);
    --accent-bg: var(--dropzone-bg-hover);
    --dropdown-bg: var(--surface-color);
    --dropdown-border: var(--border-color);
    --dropdown-hover: var(--bg-color);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --surface-color: #1e1e1e;
    --border-color: #333333;
    --dropzone-border: #555555;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-text: #aaaaaa;
    --dropzone-bg-hover: #2c2c2c;
    --success-color: #10b981;
    
    /* Dropdown UI Dark */
    --accent-color: var(--primary-color);
    --accent-bg: var(--dropzone-bg-hover);
    --dropdown-bg: var(--surface-color);
    --dropdown-border: var(--border-color);
    --dropdown-hover: var(--bg-color);
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    background: var(--bg-color);
    color: var(--text-color);
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 8px;
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 20px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: var(--primary-color);
}

.upload-section {
    padding: 50px 0;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-color);
}

.section-header p {
    font-size: 16px;
    color: var(--secondary-text);
}

.upload-container {
    border: 2px dashed var(--dropzone-border);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    background: var(--surface-color);
    transition: all 0.3s ease;
}

.upload-container.dragover {
    background: var(--dropzone-bg-hover);
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 50px;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.upload-container:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-text h3 {
    margin: 0;
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color);
}

.upload-text p {
    color: var(--secondary-text);
}

.btn {
    padding: 10px 20px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    margin: 5px;
    display: inline-block;
    transition: 0.2s;
    cursor: pointer;
}

.btn:hover {
    background: var(--primary-hover);
}

.file-types {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.file-type {
    background: var(--dropzone-bg-hover);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--secondary-text);
}

.results-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.result-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.result-card img {
    max-width: 120px;
    border-radius: 8px;
}

.result-details {
    flex: 1;
}

.savings-badge {
    display: inline-block;
    background: var(--success-color);
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    margin-top: 5px;
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.download-btn {
    background: var(--success-color);
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: opacity 0.2s;
}

.download-btn:hover {
    opacity: 0.9;
}

.compressify-layout {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.compressify-main {
    flex: 1;
    min-width: 0;
}

.ads-side {
    width: 160px;
    min-width: 120px;
}

.ad-box {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 10px;
    margin-bottom: 30px;
    text-align: center;
    border-radius: 8px;
}

.ad-box img {
    width: 100%;
    border-radius: 6px;
}

.action-buttons {
    text-align: center;
    margin-top: 20px;
    display: none;
}

/* ==========================================================================
   Dropdown UI Styles
   ========================================================================== */
.conversion-selectors {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 25px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.selector-box {
    display: flex;
    align-items: center;
    background: var(--accent-bg);
    padding: 10px 15px;
    border-radius: 12px;
    gap: 10px;
}

.selector-label {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-color);
}

.custom-select {
    position: relative;
    cursor: pointer;
    font-weight: 700;
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 6px;
    user-select: none;
}

.custom-select:hover {
    background: rgba(109, 93, 252, 0.1);
}

.select-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dropdown-bg);
    border: 1px solid var(--dropdown-border);
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    padding: 15px;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: 0.2s ease;
    width: 300px;
}

.custom-select.active .select-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(5px);
}

.select-option {
    padding: 10px;
    text-align: center;
    border-radius: 6px;
    font-weight: 600;
    color: var(--text-color);
    transition: 0.2s;
}

.select-option:hover {
    background: var(--dropdown-hover);
}

.select-option.selected {
    background: var(--accent-color);
    color: #fff;
}

/* Google Ads Fixes */
ins.adsbygoogle[data-ad-status="unfilled"] { display: none !important; }
.ad-box:has(ins.adsbygoogle[data-ad-status="unfilled"]) { display: none !important; }
.ad-box:empty { display: none !important; }
.ads-side:has(.ad-box:empty), .ads-side:has(ins.adsbygoogle[data-ad-status="unfilled"]) { display: none !important; }