/* Simplified Text Case Converter Styles */

/* CSS Variables */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #059669;
    --secondary-hover: #047857;
    --tertiary-color: #dc2626;
    --tertiary-hover: #b91c1c;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #ffffff;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    --border-color: #e5e7eb;
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.3s ease;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
}

.title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

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

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 400;
}

/* Main Content */
.main {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Section Styles */
section {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    width: 100%;
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Input Section */
.input-label,
.output-label {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: block;
    text-align: center;
}

.input-container,
.output-container {
    position: relative;
    margin-bottom: 1rem;
}

.text-input,
.text-output {
    width: 100%;
    padding: 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: 1.6;
    resize: vertical;
    transition: var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 150px;
}

.text-input:focus,
.text-output:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.text-input::placeholder,
.text-output::placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

.input-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
}

.utility-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.utility-btn:hover {
    background: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
}

.text-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

/* Conversion Grid */
.conversion-grid,
.number-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

/* Conversion Buttons */
.conversion-btn {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    min-height: 120px;
    justify-content: center;
}

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

.conversion-btn.primary {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: var(--text-light);
}

.conversion-btn.primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.conversion-btn.secondary {
    border-color: var(--secondary-color);
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
    color: var(--text-light);
}

.conversion-btn.secondary:hover {
    background: linear-gradient(135deg, var(--secondary-hover), var(--secondary-color));
}

.conversion-btn.tertiary {
    border-color: var(--tertiary-color);
    background: linear-gradient(135deg, var(--tertiary-color), var(--tertiary-hover));
    color: var(--text-light);
}

.conversion-btn.tertiary:hover {
    background: linear-gradient(135deg, var(--tertiary-hover), var(--tertiary-color));
}

.conversion-btn i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.btn-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.conversion-btn small {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 400;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.action-btn {
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    cursor: pointer;
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 150px;
    justify-content: center;
}

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

.action-btn.copy {
    background: var(--primary-color);
}

.action-btn.copy:hover {
    background: var(--primary-hover);
}

.action-btn.download {
    background: var(--secondary-color);
}

.action-btn.download:hover {
    background: var(--secondary-hover);
}

.action-btn.clear {
    background: var(--tertiary-color);
}

.action-btn.clear:hover {
    background: var(--tertiary-hover);
}

/* AdSense Container */
.ad-container {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Footer */
.footer {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
}

.coffee-btn {
    background: #ff813f;
    color: var(--text-light);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow);
}

.coffee-btn:hover {
    background: #e6732d;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Notifications */
.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 350px;
}

.notification:not(.hidden) {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification-icon {
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
}

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

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem 0.5rem;
    }
    
    .header {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .title {
        font-size: var(--font-size-2xl);
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .title i {
        font-size: 1.5rem;
    }
    
    section {
        padding: 1.5rem;
    }
    
    .conversion-grid,
    .number-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .conversion-btn {
        padding: 1.25rem;
        min-height: 100px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-btn {
        min-width: auto;
        width: 100%;
    }
    
    .text-stats {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .notification {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        transform: translateY(-200px);
        max-width: none;
    }
    
    .notification:not(.hidden) {
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0.5rem;
    }
    
    .header {
        padding: 1rem;
    }
    
    section {
        padding: 1rem;
    }
    
    .text-input,
    .text-output {
        padding: 1rem;
        min-height: 120px;
    }
    
    .conversion-btn {
        padding: 1rem;
        min-height: 80px;
    }
    
    .btn-text {
        font-size: var(--font-size-base);
    }
    
    .conversion-btn i {
        font-size: 1.25rem;
    }
}