/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1a202c;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header styles */
.header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo-icon {
    font-size: 2.5rem;
    color: #ffd700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    margin: 0;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
    max-width: 600px;
    margin: 0 auto;
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
}

/* Generator card */
.generator-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
    max-width: 500px;
}

.generator-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.card-header {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.card-header p {
    opacity: 0.9;
    font-weight: 300;
}

/* Form styles */
.generator-form {
    padding: 2rem;
}

.input-group {
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #374151;
}

.input-wrapper {
    position: relative;
}

.input-wrapper input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-right: 2.5rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-wrapper input:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    pointer-events: none;
}

.input-help {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #6b7280;
}

/* Generate button */
.generate-btn {
    width: 100%;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.generate-btn:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

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

/* Result section */
.result-section {
    border-top: 1px solid #e5e7eb;
    padding: 2rem;
    background: #f8fafc;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header h3 {
    color: #059669;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.key-display {
    background: white;
    border: 2px solid #10b981;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.key-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.key-value {
    font-family: 'Courier New', monospace;
    font-size: 2rem;
    font-weight: bold;
    color: #059669;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    word-break: break-all;
}

.copy-btn {
    background: #f3f4f6;
    border: 1px solid #d1d5db;
    color: #374151;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.copy-btn:hover {
    background: #e5e7eb;
    border-color: #9ca3af;
}

.copy-btn.copied {
    background: #10b981;
    color: white;
    border-color: #10b981;
}

.result-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.detail-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #6b7280;
}

.detail-value {
    font-weight: 600;
    color: #1f2937;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    color: white;
    opacity: 0.8;
    font-size: 0.875rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .logo-section {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .key-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .generator-form {
        padding: 1.5rem;
    }
    
    .card-header {
        padding: 1.5rem;
    }
    
    .result-section {
        padding: 1.5rem;
    }
    
    .key-value {
        font-size: 1.25rem;
    }
}

/* Loading animation */
.generate-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

.generate-btn.loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}