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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #22c55e;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

/* Header */
header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.tagline {
    color: var(--text-muted);
    margin-top: 5px;
}

/* Main */
main {
    padding: 40px 0;
}

/* Tools Grid */
.tools-grid {
    margin-bottom: 40px;
}

.tools-grid h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s;
    display: block;
}

.tool-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.tool-card .icon {
    font-size: 2rem;
    margin-bottom: 12px;
    display: block;
}

.tool-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.tool-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Ad Slots */
.ad-slot {
    background: #f1f5f9;
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    margin: 30px 0;
}

.ad-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 30px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer p + p {
    margin-top: 5px;
}

/* Tool Page Styles */
.tool-page header {
    margin-bottom: 0;
}

.tool-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 40px 0;
    text-align: center;
}

.tool-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.tool-header p {
    opacity: 0.9;
}

.tool-content {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    margin: -30px auto 30px;
    max-width: 800px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.tool-content textarea,
.tool-content input[type="text"],
.tool-content input[type="number"] {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Monaco', 'Consolas', monospace;
    resize: vertical;
    margin-bottom: 15px;
}

.tool-content textarea:focus,
.tool-content input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    margin-right: 10px;
    margin-bottom: 10px;
}

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

.btn-secondary {
    background: var(--text-muted);
}

.btn-success {
    background: var(--success);
}

.output {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    font-family: 'Monaco', 'Consolas', monospace;
    word-break: break-all;
    min-height: 60px;
}

.output.large {
    font-size: 1.5rem;
    text-align: center;
    padding: 30px;
}

.options {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.options input[type="checkbox"],
.options input[type="radio"] {
    width: 18px;
    height: 18px;
}

.slider-container {
    margin-bottom: 20px;
}

.slider-container input[type="range"] {
    width: 100%;
}

.slider-value {
    text-align: center;
    font-weight: bold;
    color: var(--primary);
}

.strength-meter {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    margin-top: 10px;
    overflow: hidden;
}

.strength-meter .fill {
    height: 100%;
    transition: all 0.3s;
}

.copy-feedback {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--success);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
}

.copy-feedback.show {
    opacity: 1;
    transform: translateY(0);
}

/* Back link */
.back-link {
    display: inline-block;
    color: white;
    text-decoration: none;
    margin-bottom: 20px;
    opacity: 0.8;
}

.back-link:hover {
    opacity: 1;
}

/* Stats row */
.stats-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.stat-box {
    flex: 1;
    min-width: 120px;
    background: #f8fafc;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
}

.stat-box .value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
}

.stat-box .label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Color swatches */
.color-preview {
    width: 100%;
    height: 100px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.color-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.color-inputs label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

@media (max-width: 600px) {
    .grid {
        grid-template-columns: 1fr;
    }
    
    .tool-content {
        margin: -20px 10px 20px;
        padding: 20px;
    }
}