:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #c7d2fe;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --danger: #ef4444;
    --warning: #f59e0b;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #f0f4ff 0%, #f8fafc 100%);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

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

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
}

.home-btn {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
    border: 2px solid transparent;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.home-btn:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
    border-color: var(--primary-dark);
}

.home-icon {
    font-size: 1.2rem;
}

.home-text {
    white-space: nowrap;
}

.logo {
    font-size: 2.8rem;
    color: var(--primary);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Main Content */
.main-content {
    display: grid;
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.card-header {
    padding: 24px 30px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.5rem;
    color: var(--text-main);
}

.actions {
    display: flex;
    gap: 12px;
}

.btn-icon {
    background: var(--primary-light);
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

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

.copy-btn:hover {
    background: var(--secondary-dark);
}

/* Textarea */
.textarea-container {
    position: relative;
    padding: 30px;
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: 20px;
    font-size: 16px;
    line-height: 1.6;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    resize: vertical;
    font-family: inherit;
    transition: var(--transition);
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.char-count {
    position: absolute;
    bottom: 10px;
    right: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 10px;
    border-radius: 20px;
}

/* Tool Sections */
.tool-section {
    padding: 0 30px 30px;
}

.tool-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tools {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.tool-btn {
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 16px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.tool-btn:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.1);
}

.tool-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.tool-text {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-main);
}

/* Info Section */
.info-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.info-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.info-card h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.stats {
    display: grid;
    gap: 20px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 1px dashed var(--border);
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary);
}

.tips {
    list-style: none;
}

.tips li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.tips li:before {
    content: "✓";
    color: var(--secondary);
    font-weight: bold;
}

/* Ad Section */
.ad-section {
    margin: 40px 0;
    border-radius: var(--radius);
    overflow: hidden;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition);
    font-weight: 500;
}

.footer-link:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-2px);
}

.footer-separator {
    color: var(--text-light);
}

.footer-icon {
    font-size: 1.1rem;
}

.footer p {
    margin-bottom: 10px;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--secondary);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 20px;
        position: relative;
        padding-top: 60px;
    }
    
    .home-btn {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        top: 0;
        width: auto;
    }
    
    .logo {
        font-size: 2.2rem;
        margin-top: 20px;
    }
    
    .tools {
        grid-template-columns: 1fr;
    }
    
    .info-section {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
    
    .actions {
        align-self: flex-end;
    }
    
    .textarea-container, .tool-section, .card-header {
        padding: 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .footer-separator {
        display: none;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .home-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .tool-btn {
        flex-direction: column;
        text-align: center;
        padding: 15px;
    }
    
    .tool-icon {
        font-size: 1.5rem;
    }
}