:root {
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --border-card: #e2e8f0;
    --accent-purple: #7C3AED;
    --accent-blue: #3B82F6;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --gradient-main: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    --glow: 0 10px 30px rgba(124, 58, 237, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-bg: rgba(248, 250, 252, 0.8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

/* 3D Glow Background */
.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.glow-bg::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    filter: blur(80px);
    animation: moveGlow 15s infinite alternate;
}

.glow-bg::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    bottom: -150px;
    left: -100px;
    filter: blur(80px);
    animation: moveGlow 20s infinite alternate-reverse;
}

@keyframes moveGlow {
    0% { transform: translate(0, 0); }
    100% { transform: translate(100px, 100px); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    padding: 20px 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-card);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.logo span {
    color: var(--accent-purple);
}

.brand-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
    transition: var(--transition);
}

.brand-logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.tool-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.tool-link:hover {
    color: var(--accent-purple);
}

/* Views Management */
.view {
    display: none;
    padding: 80px 20px;
    min-height: calc(100vh - 80px);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.view.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 60px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.privacy-badge {
    display: inline-flex;
    padding: 8px 16px;
    background: var(--bg-card);
    border-radius: 50px;
    border: 1px solid var(--border-card);
    font-size: 0.9rem;
    color: #10b981;
}

/* Tool Cards Grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(5px);
}

.tool-card:hover {
    transform: translateY(-10px) rotateX(2deg) rotateY(2deg);
    border-color: var(--accent-purple);
    box-shadow: var(--glow);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.card-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 10px;
    background: var(--gradient-main);
    color: white;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Tool Header & Controls */
.tool-header {
    max-width: 800px;
    margin: 0 auto 40px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.back-btn {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.back-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* Drop Zone */
.drop-zone {
    max-width: 800px;
    margin: 0 auto 40px;
    height: 300px;
    border: 2px dashed var(--border-card);
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(124, 58, 237, 0.02);
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--accent-purple);
    background: rgba(124, 58, 237, 0.05);
}

.drop-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.drop-content p {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.drop-content p span {
    color: var(--accent-purple);
    font-weight: 600;
}

.drop-content small {
    color: var(--text-secondary);
}

/* Preview Grid */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    max-width: 800px;
    margin: 0 auto 40px;
}

.preview-item {
    aspect-ratio: 4/5;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 10px;
    border: 1px solid var(--border-card);
    position: relative;
    cursor: grab;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.merge-item {
    aspect-ratio: auto;
    height: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.merge-file-info {
    text-align: center;
    width: 100%;
}

.merge-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.merge-name {
    font-size: 0.8rem;
    font-weight: 600;
    word-break: break-all;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.merge-size {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.preview-item .remove-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 24px;
    height: 24px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    z-index: 10;
}

.preview-item .index-badge {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: var(--bg-dark);
    color: var(--text-primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    border: 1px solid var(--border-card);
}

/* Actions Bar */
.actions {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    padding: 24px;
    border-radius: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-card);
}

.stats {
    display: flex;
    flex-direction: column;
}

.stats span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.mode-selector {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.mode-selector label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.mode-selector input {
    accent-color: var(--accent-purple);
}

.controls {
    display: flex;
    gap: 15px;
}

.primary-btn, .download-btn {
    padding: 14px 35px;
    background: var(--gradient-main);
    border: none;
    color: white;
    font-weight: 700;
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(124, 58, 237, 0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.primary-btn:hover, .download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(124, 58, 237, 0.4);
}

.secondary-btn {
    padding: 12px 24px;
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

/* Result Card */
.result-card {
    max-width: 400px;
    margin: 40px auto;
    background: #fdfbff;
    border: 1px solid var(--accent-purple);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.05);
}

.success-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

/* Options Container for Compress */
.options-container {
    max-width: 600px;
    margin: 0 auto 40px;
    background: var(--bg-card);
    padding: 30px;
    border-radius: 24px;
    border: 1px solid var(--border-card);
}

.option-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

.option-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border: 1px solid var(--border-card);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.option-card:has(input:checked) {
    background: rgba(124, 58, 237, 0.05);
    border-color: var(--accent-purple);
}

.option-card input {
    accent-color: var(--accent-purple);
}

.option-info {
    display: flex;
    flex-direction: column;
}

.option-info strong { font-size: 1rem; }
.option-info span { font-size: 0.8rem; color: var(--text-secondary); }

/* Loader Overlay */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top: 4px solid var(--accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s forwards;
}

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

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { gap: 10px; }
    .tool-link { font-size: 0.8rem; }
    .hero h1 { font-size: 2.2rem; }
    .tool-grid { grid-template-columns: 1fr; }
    .actions { flex-direction: column; gap: 20px; text-align: center; }
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: 1px solid var(--border-card);
    text-align: center;
    color: var(--text-secondary);
}

.footer-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

.ad-placeholder {
    max-width: 800px;
    margin: 60px auto;
    height: 100px;
    background: var(--bg-card);
    border: 1px dashed var(--border-card);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Blog Section */
.blog-section {
    max-width: 1000px;
    margin: 80px auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 40px;
    text-align: center;
    color: var(--text-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    padding: 30px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glow);
    border-color: var(--accent-purple);
}

.blog-card h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.blog-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    flex-grow: 1;
}

.read-more {
    color: var(--accent-purple);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    gap: 10px;
}

/* Blog Page Styles */
.blog-page-content {
    max-width: 800px;
    margin: 60px auto;
    padding: 0 20px;
}

.blog-header {
    text-align: center;
    margin-bottom: 40px;
}

.blog-header h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.blog-post h2 {
    font-size: 1.75rem;
    margin: 40px 0 20px;
}

.blog-post p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.blog-post ul {
    margin-bottom: 30px;
    padding-left: 20px;
}

.blog-post li {
    margin-bottom: 10px;
}

.blog-footer {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-card);
    display: flex;
    justify-content: space-between;
}