/* ===========================
   CSS Custom Properties
   =========================== */
:root {
    /* Colors */
    --primary-gradient: linear-gradient(135deg, #6366F1 0%, #A855F7 100%);
    --secondary-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --dark-bg: #0F0F1E;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --accent-blue: #6366F1;
    --accent-purple: #A855F7;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===========================
   Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    z-index: -1;
    animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ===========================
   Typography
   =========================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===========================
   Container
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Header
   =========================== */
.header {
    padding: var(--spacing-md) 0;
    backdrop-filter: blur(10px);
    background: rgba(15, 15, 30, 0.8);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-normal);
}

.nav a:hover {
    color: var(--text-primary);
}

.nav a:hover::after {
    width: 100%;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.badge {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* ===========================
   Converter Section
   =========================== */
.converter-section {
    padding: var(--spacing-2xl) 0;
}

.converter-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    animation: fadeIn 1s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Mode Switcher */
.mode-switcher {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-xs);
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
}

.mode-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.mode-btn span {
    font-size: 1.25rem;
}

.mode-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.mode-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: all var(--transition-slow);
    border-radius: 50%;
}

.upload-area:hover {
    border-color: var(--accent-blue);
    background: rgba(99, 102, 241, 0.05);
}

.upload-area:hover::before {
    width: 400px;
    height: 400px;
}

.upload-area.drag-over {
    border-color: var(--accent-purple);
    background: rgba(168, 85, 247, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.upload-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.upload-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.upload-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Password Section */
.password-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}

.password-section label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.password-section input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.password-section input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.password-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* File List */
.file-list {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

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

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.file-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.file-details h4 {
    font-size: 0.875rem;
    margin-bottom: 2px;
}

.file-details p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.file-remove {
    background: transparent;
    border: none;
    color: #EF4444;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.file-remove:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Progress Section */
.progress-section {
    margin-top: var(--spacing-lg);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width var(--transition-normal);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.3),
            transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

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

.progress-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-normal);
    margin-top: var(--spacing-lg);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
}

/* Results Section */
.results-section {
    margin-top: var(--spacing-xl);
}

.results-section h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    transition: all var(--transition-normal);
    animation: fadeIn 0.5s ease;
}

.result-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-blue);
}

.result-preview {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.result-download {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ===========================
   Features Section
   =========================== */
.features {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    animation: fadeInUp 0.6s ease backwards;
}

.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.5s;
}

.feature-card:nth-child(6) {
    animation-delay: 0.6s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===========================
   How It Works Section
   =========================== */
.how-it-works {
    padding: var(--spacing-2xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.step-card {
    text-align: center;
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: -20px auto var(--spacing-md);
    box-shadow: var(--shadow-glow);
    animation: pulse 2s ease-in-out infinite;
    position: relative;
    z-index: 2;
    border: 4px solid var(--dark-bg);
}

.step-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--card-border);
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.step-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.step-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===========================
   FAQ Section
   =========================== */
.faq {
    padding: var(--spacing-2xl) 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    cursor: pointer;
    overflow: hidden;
    position: relative;
}

.faq-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
    transform-origin: top;
}

.faq-item:hover::before {
    transform: scaleY(1);
}

.faq-item:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    background: rgba(99, 102, 241, 0.05);
}

.faq-item h3 {
    font-size: 1.125rem;
    margin-bottom: 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color var(--transition-fast);
    position: relative;
}

.faq-item h3::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-blue);
    transition: all var(--transition-normal);
    font-weight: 300;
    line-height: 1;
}

.faq-item:hover h3 {
    color: var(--accent-blue);
}

.faq-item:hover h3::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: all var(--transition-slow);
}

.faq-item:hover p {
    max-height: 500px;
    opacity: 1;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
}

/* ===========================
   Footer
   =========================== */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--card-border);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

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

.footer-section a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
}

/* ===========================
   Responsive Design
   =========================== */

/* Tablet and below (768px) */
@media (max-width: 768px) {

    /* Header */
    .header {
        padding: var(--spacing-sm) 0;
    }

    .nav {
        display: none;
    }

    .logo {
        font-size: 1.125rem;
    }

    .logo svg {
        width: 32px;
        height: 32px;
    }

    /* Hero Section */
    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero-title {
        font-size: clamp(2rem, 6vw, 2.5rem);
        margin-bottom: var(--spacing-sm);
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: var(--spacing-md);
    }

    .hero-badges {
        gap: var(--spacing-xs);
    }

    .badge {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.813rem;
    }

    /* Converter Section */
    .converter-section {
        padding: var(--spacing-xl) 0;
    }

    .converter-card {
        padding: var(--spacing-lg);
    }

    .mode-switcher {
        gap: var(--spacing-xs);
    }

    .mode-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.938rem;
    }

    .mode-btn span {
        font-size: 1.125rem;
    }

    .upload-area {
        padding: var(--spacing-xl);
    }

    .upload-title {
        font-size: 1.25rem;
    }

    .upload-subtitle,
    .upload-info {
        font-size: 0.875rem;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.938rem;
        width: 100%;
        justify-content: center;
    }

    /* Grids */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .feature-card {
        padding: var(--spacing-lg);
    }

    .feature-icon {
        font-size: 2.5rem;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .step-card {
        padding: var(--spacing-lg);
    }

    .step-card::after {
        display: none;
    }

    .faq-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .faq-item {
        padding: var(--spacing-md);
    }

    .faq-item h3 {
        font-size: 1rem;
    }

    /* Results Grid */
    .results-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-sm);
    }

    /* Footer */
    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }

    /* Section Spacing */
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-xl) 0;
    }

    .section-title {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
        margin-bottom: var(--spacing-lg);
    }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {

    /* Container */
    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Header */
    .header {
        padding: var(--spacing-xs) 0;
    }

    .logo {
        font-size: 1rem;
        gap: var(--spacing-xs);
    }

    .logo svg {
        width: 28px;
        height: 28px;
    }

    /* Hero Section */
    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 0.938rem;
        line-height: 1.6;
    }

    .hero-badges {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }

    .badge {
        text-align: center;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }

    /* Converter Section */
    .converter-section {
        padding: var(--spacing-lg) 0;
    }

    .converter-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .mode-switcher {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .mode-btn {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
        width: 100%;
    }

    .mode-btn span {
        font-size: 1rem;
    }

    .upload-area {
        padding: var(--spacing-lg);
    }

    .upload-icon svg {
        width: 48px;
        height: 48px;
    }

    .upload-title {
        font-size: 1.125rem;
    }

    .upload-subtitle,
    .upload-info {
        font-size: 0.813rem;
    }

    .password-section {
        padding: var(--spacing-sm);
    }

    .password-section input {
        font-size: 0.938rem;
    }

    /* File List */
    .file-item {
        padding: var(--spacing-sm);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .file-info {
        width: 100%;
    }

    .file-remove {
        align-self: flex-end;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
        width: 100%;
    }

    /* Progress */
    .progress-text {
        font-size: 0.813rem;
    }

    /* Results */
    .results-section h3 {
        font-size: 1.25rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .result-preview {
        height: 200px;
    }

    /* Features Section */
    .features,
    .how-it-works,
    .faq {
        padding: var(--spacing-lg) 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }

    .features-grid {
        gap: var(--spacing-sm);
    }

    .feature-card {
        padding: var(--spacing-md);
    }

    .feature-icon {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
    }

    .feature-card h3 {
        font-size: 1.125rem;
    }

    .feature-card p {
        font-size: 0.875rem;
    }

    /* How It Works Section */
    .steps-grid {
        gap: var(--spacing-md);
    }

    .step-card {
        padding: var(--spacing-md);
    }

    .step-number {
        width: 36px;
        height: 36px;
        font-size: 1.125rem;
        margin: -18px auto var(--spacing-sm);
        border-width: 3px;
    }

    .step-image {
        height: 140px;
    }

    .step-card h3 {
        font-size: 1.125rem;
    }

    .step-card p {
        font-size: 0.875rem;
    }

    /* FAQ Section */
    .faq-grid {
        gap: var(--spacing-sm);
    }

    .faq-item {
        padding: var(--spacing-sm);
    }

    .faq-item h3 {
        font-size: 0.938rem;
    }

    .faq-item h3::after {
        font-size: 1.25rem;
    }

    .faq-item p {
        font-size: 0.875rem;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-section {
        text-align: center;
    }

    .footer-section .logo {
        justify-content: center;
    }

    .footer-section h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-sm);
    }

    .footer-section p,
    .footer-section a {
        font-size: 0.875rem;
    }

    .footer-bottom {
        padding-top: var(--spacing-sm);
        font-size: 0.813rem;
    }
}

/* Small Mobile (360px and below) */
@media (max-width: 360px) {

    /* Extra small adjustments */
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.875rem;
    }

    .converter-card {
        padding: var(--spacing-sm);
    }

    .upload-area {
        padding: var(--spacing-md);
    }

    .upload-icon svg {
        width: 40px;
        height: 40px;
    }

    .upload-title {
        font-size: 1rem;
    }

    .mode-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .feature-card,
    .step-card,
    .faq-item {
        padding: var(--spacing-sm);
    }

    .section-title {
        font-size: 1.375rem;
    }
}