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

:root {
    /* YouTube Benzeri Kırmızı Tema Renkleri */
    --primary-red: #FF0000;
    --light-red: #FF4444;
    --lighter-red: #FF6666;
    --lightest-red: #FFAAAA;
    --dark-red: #CC0000;
    --darker-red: #990000;
    
    /* Gradient Renkler */
    --gradient-primary: linear-gradient(135deg, #FF0000 0%, #FF4444 100%);
    --gradient-secondary: linear-gradient(135deg, #FF4444 0%, #FF6666 100%);
    
    /* Nötr Renkler */
    --white: #FFFFFF;
    --light-gray: #F8F8F8;
    --gray: #E0E0E0;
    --dark-gray: #606060;
    --darker-gray: #303030;
    --black: #0F0F0F;
    
    /* Durum Renkleri */
    --success: #FF0000;
    --warning: #FF8800;
    --error: #FF0000;
    --info: #2196F3;
    
    /* Gölgeler */
    --shadow-light: 0 2px 8px rgba(255, 0, 0, 0.1);
    --shadow-medium: 0 4px 16px rgba(255, 0, 0, 0.15);
    --shadow-heavy: 0 8px 32px rgba(255, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-xl: 24px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F8F8 100%);
    min-height: 100vh;
}

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

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
}

.logo i {
    font-size: 2rem;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--darker-gray);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-red);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F8F8 50%, #F0F0F0 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--black);
}

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

.hero-description {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-medium);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-red);
    border: 2px solid var(--primary-red);
}

.btn-secondary:hover {
    background: var(--primary-red);
    color: var(--white);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-success {
    background: var(--primary-red);
    color: var(--white);
}

.btn-loading {
    display: none;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-preview {
    width: 300px;
    height: 400px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-heavy);
}

.video-preview i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

/* Main Form */
.main-form {
    padding: 80px 0;
    background: var(--white);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
}

.form-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--black);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.form-title i {
    color: var(--primary-red);
}

.shorts-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Video Source Tabs */
.video-source-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.source-tab {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--gray);
    border-radius: var(--radius-medium);
    background: var(--white);
    color: var(--dark-gray);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.source-tab:hover {
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.source-tab.active {
    border-color: var(--primary-red);
    background: var(--primary-red);
    color: var(--white);
}

.source-tab i {
    font-size: 1.25rem;
}

/* File Upload Area */
.file-upload-area {
    border: 2px dashed var(--gray);
    border-radius: var(--radius-medium);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--light-gray);
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--primary-red);
    background: var(--lightest-red);
}

.file-upload-area.dragover {
    border-color: var(--primary-red);
    background: var(--lightest-red);
    transform: scale(1.02);
}

.file-upload-area i {
    font-size: 3rem;
    color: var(--primary-red);
    margin-bottom: 1rem;
}

.file-upload-area p {
    font-size: 1.125rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

/* File Info */
.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--lightest-red);
    border-radius: var(--radius-medium);
    margin-top: 1rem;
}

.file-details {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-details i {
    font-size: 1.5rem;
    color: var(--primary-red);
}

.file-name {
    font-weight: 600;
    color: var(--black);
}

.file-size {
    color: var(--dark-gray);
    font-size: 0.875rem;
}

.btn-remove {
    background: var(--error);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-remove:hover {
    background: var(--darker-red);
    transform: scale(1.1);
}

.form-label {
    font-weight: 600;
    color: var(--black);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-label i {
    color: var(--primary-red);
}

.form-input {
    padding: 1rem;
    border: 2px solid var(--gray);
    border-radius: var(--radius-medium);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

.input-help {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--dark-gray);
}

.input-help i {
    color: var(--info);
}

.form-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
    background: var(--light-gray);
    border-radius: var(--radius-medium);
}

.option-group h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--black);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-red);
    border-color: var(--primary-red);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-weight: bold;
}

.range-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.range-group label {
    font-weight: 500;
    color: var(--black);
}

.range-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--gray);
    outline: none;
    -webkit-appearance: none;
}

.range-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-red);
    cursor: pointer;
    box-shadow: var(--shadow-light);
}

.range-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-red);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-light);
}

/* Progress Section */
.progress-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.progress-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.progress-container h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--black);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 3rem;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.5s ease;
}

.progress-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: var(--radius-medium);
    background: var(--white);
    transition: all 0.3s ease;
    opacity: 0.5;
}

.step.active {
    opacity: 1;
    background: var(--lightest-red);
    color: var(--primary-red);
}

.step.completed {
    opacity: 1;
    background: var(--primary-red);
    color: var(--white);
}

.step i {
    font-size: 1.5rem;
}

.step span {
    font-weight: 500;
    font-size: 0.875rem;
    text-align: center;
}

/* Results Section */
.results-section {
    padding: 80px 0;
    background: var(--white);
}

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

.results-container h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--black);
}

.shorts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.shorts-item {
    background: var(--white);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.shorts-item:hover {
    transform: translateY(-4px);
}

.shorts-preview {
    width: 100%;
    height: 200px;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    position: relative;
}

.shorts-preview i {
    font-size: 3rem;
}

.shorts-info {
    padding: 1.5rem;
}

.shorts-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--black);
}

.shorts-duration {
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.shorts-text {
    font-size: 0.875rem;
    color: var(--darker-gray);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.shorts-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.download-all {
    text-align: center;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--light-gray);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--black);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--white);
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--black);
}

.feature-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* How It Works */
.how-it-works {
    padding: 80px 0;
    background: var(--white);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--black);
}

.step-content p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-red);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
    color: var(--gray);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--darker-gray);
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .form-options {
        grid-template-columns: 1fr;
    }
    
    .progress-steps {
        grid-template-columns: 1fr;
    }
    
    .shorts-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .form-container {
        padding: 2rem 1rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading .btn-loading {
    display: flex !important;
}

.loading .btn-text {
    display: none;
}

/* Success States */
.success {
    color: var(--primary-red);
}

.warning {
    color: var(--warning);
}

.error {
    color: var(--error);
}