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

:root {
    --primary: #0EA5E9;
    --primary-dark: #0284C7;
    --success: #10B981;
    --bg: #FAFAFA;
    --surface: #FFFFFF;
    --border: #E5E7EB;
    --text: #111827;
    --text-light: #6B7280;
    --shadow: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 8px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    height: 100px;
}

.nav-partner {
    height: 85px;
}

.app {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

.sidebar {
    width: 380px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: visible;
}

.sidebar-content {
    padding: 24px;
}

.mode-switch {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s;
}

.mode-btn:hover {
    background: var(--bg);
}

.mode-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.ad-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 24px;
}

.ad-box iframe {
    width: 100%;
    min-height: 600px;
    border: none;
}

.main {
    flex: 1;
    padding: 40px;
}

.hero {
    text-align: center;
    margin-bottom: 48px;
}

.hero h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text);
}

.hero p {
    font-size: 18px;
    color: var(--text-light);
}

.generator {
    display: none;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

.generator.active {
    display: block;
}

.format-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.format-chip {
    padding: 8px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.format-chip:hover {
    border-color: var(--primary);
}

.format-chip.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.format-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
}

.format-select:focus {
    outline: none;
    border-color: var(--primary);
}

.input-box {
    margin-bottom: 24px;
}

.input-box label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--text);
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
}

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

.btn-primary, .btn-secondary, .btn-download {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    flex: 1;
    background: var(--primary);
    color: white;
}

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

.btn-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}

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

.btn-download {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--success);
    color: white;
}

.btn-download:hover {
    background: #059669;
}

.results {
    display: none;
    margin-top: 40px;
}

.results.active {
    display: block;
}

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

.results-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.code-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    transition: all 0.2s;
}

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

.code-card canvas,
.code-card svg {
    width: 100%;
    max-width: 150px;
    height: auto;
    background: white;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.code-value {
    font-size: 12px;
    color: var(--text-light);
    word-break: break-all;
    font-family: 'Courier New', monospace;
}

footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 24px 0;
}

footer iframe {
    width: 100%;
    height: 60px;
    border: none;
}

@media (max-width: 1024px) {
    .app {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
    }
    
    .mode-switch {
        flex-direction: row;
    }
    
    .main {
        padding: 24px;
    }
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .generator {
        padding: 20px;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
}