:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --gray-color: #6b7280;
    --gray-light: #e5e7eb;
    --border-radius: 12px;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

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

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
    animation: fadeIn 0.8s ease-out;
}

.header h1 {
    font-size: 2.8rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.header .subtitle {
    font-size: 1.2rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 30px;
    animation: slideUp 0.6s ease-out;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

/* Input Section */
.input-group {
    display: flex;
    max-width: 700px;
    margin: 25px auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.domain-prefix {
    background: var(--gray-light);
    padding: 18px 25px;
    font-weight: 600;
    color: var(--dark-color);
    border-right: 2px solid var(--gray-light);
    display: flex;
    align-items: center;
}

#domainInput {
    flex: 1;
    padding: 18px 25px;
    border: none;
    font-size: 1.1rem;
    background: white;
    transition: var(--transition);
}

#domainInput:focus {
    outline: none;
    background: var(--light-color);
}

#generateBtn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 18px 35px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

#generateBtn:hover {
    background: linear-gradient(135deg, var(--primary-dark), #3730a3);
    letter-spacing: 0.5px;
}

.domain-example {
    text-align: center;
    margin-top: 15px;
    color: var(--gray-color);
}

/* Progress */
.progress-container {
    margin: 30px 0;
}

.progress-bar {
    height: 10px;
    background: var(--gray-light);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), #34d399);
    border-radius: 5px;
    width: 0%;
    transition: width 0.5s ease-out;
}

.progress-text {
    font-weight: 600;
    color: var(--dark-color);
    font-size: 1.1rem;
}

/* Output Container */
.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.btn-secondary {
    background: var(--gray-light);
    color: var(--dark-color);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.output-log {
    background: #1a1a1a;
    color: #00ff00;
    padding: 25px;
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    height: 350px;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.5;
}

.log-entry {
    margin-bottom: 10px;
    padding-left: 10px;
    border-left: 3px solid transparent;
    animation: fadeInLeft 0.3s ease-out;
}

.log-info { border-left-color: var(--primary-color); color: #60a5fa; }
.log-success { border-left-color: var(--secondary-color); color: #34d399; }
.log-warning { border-left-color: var(--warning-color); color: #fbbf24; }
.log-error { border-left-color: var(--danger-color); color: #f87171; }

.log-time {
    color: #9ca3af;
    margin-right: 10px;
}

/* Files Grid */
.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
}

.file-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 5px solid var(--primary-color);
}

.file-card:nth-child(2) { border-top-color: var(--secondary-color); }
.file-card:nth-child(3) { border-top-color: var(--warning-color); }

.file-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

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

.file-card:nth-child(2) .file-icon { color: var(--secondary-color); }
.file-card:nth-child(3) .file-icon { color: var(--warning-color); }

.file-card h3 {
    margin-bottom: 10px;
    color: var(--dark-color);
}

.file-card p {
    color: var(--gray-color);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.file-stats {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
    padding: 15px;
    background: var(--light-color);
    border-radius: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.btn-download {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.file-card:nth-child(2) .btn-download { background: var(--secondary-color); }
.file-card:nth-child(2) .btn-download:hover { background: #0da271; }

.file-card:nth-child(3) .btn-download { background: var(--warning-color); }
.file-card:nth-child(3) .btn-download:hover { background: #d97706; }

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.info-item {
    padding: 20px;
    background: var(--light-color);
    border-radius: 10px;
    transition: var(--transition);
}

.info-item:hover {
    background: #e0e7ff;
    transform: translateX(5px);
}

.info-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 50px;
    padding: 25px;
    color: var(--gray-color);
    font-size: 0.95rem;
    border-top: 1px solid var(--gray-light);
}

/* Notification */
.notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 15px 25px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .domain-prefix {
        justify-content: center;
        border-right: none;
        border-bottom: 2px solid var(--gray-light);
    }
    
    .files-grid {
        grid-template-columns: 1fr;
    }
    
    .output-log {
        height: 250px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .card {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    #generateBtn {
        padding: 15px;
        font-size: 1rem;
    }
}