* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #fad8d1;
    --primary-hover: #f5c8be;
    --secondary-color: #000000;
    --success-color: #059669;
    --danger-color: #fad8d1;
    --warning-color: #d97706;
    --background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    --card-bg: #ffffff;
    --text-primary: #000000;
    --text-secondary: #4b5563;
    --border-radius: 16px;
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --accent-red: #fad8d1;
    --accent-red-hover: #f5c8be;
    --dark-bg: #000000;
    --dark-card: #1a1a1a;
    --border-color: rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background: var(--background);
    background-image: url('background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-y: auto; /* Scroll'u aktif hale getir */
    font-weight: 400;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
    box-sizing: border-box;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start; /* Üstten başla */
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 24px;
    color: #ffffff;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 8px;
}

.gensyn-logo {
    width: 60px;
    height: 60px;
    filter: drop-shadow(0 4px 8px rgba(250, 216, 209, 0.3));
    transition: var(--transition);
}

.gensyn-logo:hover {
    transform: scale(1.1);
    filter: drop-shadow(0 6px 12px rgba(250, 216, 209, 0.5));
}

header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.025em;
}

header p {
    font-size: 1.125rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Instructions Section */
.instructions-section {
    width: 100%;
    max-width: 900px;
    margin: 0 auto 32px auto;
}

.instructions-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    background: var(--dark-card);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(250, 216, 209, 0.1);
}

.instruction-step {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    padding: 16px;
    border-radius: 12px;
    transition: var(--transition);
    opacity: 0.6;
}

.instruction-step.active {
    opacity: 1;
    background: rgba(250, 216, 209, 0.1);
    border: 1px solid rgba(250, 216, 209, 0.3);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--accent-red);
    color: #000000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.step-content h3 {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-content h3 i {
    color: var(--accent-red);
}

.step-content p {
    color: #d1d5db;
    font-size: 0.875rem;
    margin: 0;
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 24px;
    max-width: 100%;
    overflow: hidden;
}

/* Upload Section */
.upload-section {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.upload-area {
    background: var(--card-bg);
    border: 3px dashed #cbd5e1;
    border-radius: var(--border-radius);
    padding: 48px 32px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(250, 216, 209, 0.05);
    transform: scale(1.02);
}

.upload-content {
    max-width: 480px;
    margin: 0 auto;
}

.upload-icon i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    opacity: 0.8;
}

.upload-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1.125rem;
}

.upload-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 32px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 8px 12px;
    background: rgba(250, 216, 209, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(250, 216, 209, 0.1);
}

.feature i {
    color: var(--success-color);
    font-size: 0.75rem;
}

.select-btn {
    background: var(--primary-color);
    color: #000000;
    border: none;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(250, 216, 209, 0.4);
}

.select-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(250, 216, 209, 0.5);
}

/* Preview Section */
.preview-section {
    width: 100%;
    max-width: 800px;
    margin: 20px 0;
    padding: 24px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
    max-height: 60vh; /* Maksimum yükseklik */
    overflow-y: auto; /* İçerik scroll */
}

.preview-section.show {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header h3 i {
    color: var(--primary-color);
}

.image-count {
    background: var(--primary-color);
    color: #000000;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0;
    margin-bottom: 24px;
}

.image-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
    aspect-ratio: 1;
}

.image-item:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

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

.image-item .remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(250, 216, 209, 0.9);
    color: #000000;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.image-item .remove-btn:hover {
    background: var(--danger-color);
    transform: scale(1.1);
}

.action-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Progress Section */
.progress-section {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
}

.progress-content {
    max-width: 480px;
    margin: 0 auto;
}

.progress-icon i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.progress-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 4px;
}

.progress-section p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1.125rem;
}

.progress-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 32px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.step.active {
    color: var(--primary-color);
}

.step i {
    font-size: 1.25rem;
    padding: 12px;
    background: #f1f5f9;
    border-radius: 50%;
    transition: var(--transition);
}

.step.active i {
    background: var(--primary-color);
    color: #000000;
}

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

/* Result Section */
.result-section {
    width: 100%;
    max-width: 800px;
    margin: 20px 0;
    padding: 24px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
    max-height: 70vh; /* Maksimum yükseklik */
    overflow-y: auto; /* İçerik scroll */
}

.result-section.show {
    opacity: 1;
    transform: translateY(0);
}

.result-header {
    margin-bottom: 32px;
}

.success-icon i {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 16px;
}

.result-header h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.result-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.collage-preview {
    margin-bottom: 32px;
}

.result-content img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    margin-bottom: 24px;
    object-fit: contain;
}

.collage-info {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.info-item i {
    color: var(--primary-color);
}

.download-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Button Styles */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: var(--primary-color);
    color: #000000;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(250, 216, 209, 0.4);
}

.btn-secondary {
    background: var(--secondary-color);
    color: #ffffff;
}

.btn-secondary:hover {
    background: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

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

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(5, 150, 105, 0.4);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 20px;
    color: #ffffff;
    opacity: 0.9;
    flex-shrink: 0;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 400px;
    margin: 0 auto;
}

.velaryon-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(250, 216, 209, 0.2);
    border: 1px solid rgba(250, 216, 209, 0.3);
}

.velaryon-link:hover {
    background: rgba(250, 216, 209, 0.3);
    border-color: var(--accent-red);
    transform: translateY(-2px);
}

.velaryon-link i {
    color: var(--accent-red);
    font-size: 1.125rem;
}

/* Smooth transitions for sections */
.preview-section,
.progress-section,
.result-section {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.preview-section.show,
.progress-section.show,
.result-section.show {
    opacity: 1;
    transform: translateY(0);
}

/* Hide sections by default */
.preview-section,
.progress-section,
.result-section {
    display: none;
}

/* Custom scrollbar */
.preview-section::-webkit-scrollbar,
.result-section::-webkit-scrollbar {
    width: 8px;
}

.preview-section::-webkit-scrollbar-track,
.result-section::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

.preview-section::-webkit-scrollbar-thumb,
.result-section::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.preview-section::-webkit-scrollbar-thumb:hover,
.result-section::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}

/* Notification System */
.notification {
    position: fixed;
    top: 24px;
    right: 24px;
    background: white;
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    transform: translateX(400px);
    transition: var(--transition);
    max-width: 350px;
    border-left: 4px solid var(--primary-color);
}

.notification.show {
    transform: translateX(0);
}

.notification i {
    font-size: 1.25rem;
}

.notification-success {
    border-left-color: var(--success-color);
}

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

.notification-error {
    border-left-color: var(--danger-color);
}

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

.notification-warning {
    border-left-color: var(--warning-color);
}

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

.notification-info {
    border-left-color: var(--primary-color);
}

.notification-info i {
    color: var(--primary-color);
}

.notification span {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Mobile notification adjustments */
@media (max-width: 768px) {
    .notification {
        top: 16px;
        right: 16px;
        left: 16px;
        max-width: none;
        transform: translateY(-100px);
    }
    
    .notification.show {
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    header h1 {
        font-size: 1.75rem;
    }
    
    .upload-area {
        padding: 32px 20px;
        min-height: 200px;
    }
    
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 12px;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .preview-section,
    .progress-section,
    .result-section {
        max-width: 95%;
        padding: 24px 20px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 12px;
    }
    
    .progress-steps {
        flex-direction: column;
        gap: 16px;
    }
    
    /* Instructions responsive */
    .instructions-container {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }
    
    .instruction-step {
        width: 100%;
        justify-content: flex-start;
    }
    
    /* Upload features responsive */
    .upload-features {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}