:root {
    --primary-dark: #1a1a1a;
    --text-dark: #333333;
    --bg-light: #f8f9fa;
    --border-gray: #e0e0e0;
    --accent-blue: #004a99;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.navbar {
    display: flex;
    justify-content: center;
    padding: 1.5rem;
    background: #fff;
    border-bottom: 1px solid var(--border-gray);
}

.nav-brand img { height: 40px; width: auto; }

.main-container {
    max-width: 900px;
    margin: 3rem auto;
    padding: 0 1.5rem;
    flex: 1;
}

.card {
    background: #fff;
    padding: 2rem;
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    margin-bottom: 2rem;
}

h2 { margin-bottom: 1.5rem; font-size: 1.25rem; color: var(--primary-dark); }

.grid-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.form-group.full { grid-column: span 2; }

label { font-weight: 600; font-size: 0.9rem; }

input, select, textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 1rem;
    outline: none;
}

.platform-switch {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    background: #eee;
    padding: 0.5rem;
    border-radius: 6px;
}

.switch-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    font-weight: 600;
    transition: 0.2s;
}

.switch-btn.active { background: var(--primary-dark); color: #fff; }

.btn-generate {
    width: 100%;
    padding: 1rem;
    background: var(--primary-dark);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
}

.output-area {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f1f1f1;
    border-radius: 6px;
    display: none;
}

.output-box {
    background: #fff;
    padding: 1rem;
    border: 1px solid var(--border-gray);
    margin-bottom: 1.5rem;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.75rem;
    cursor: pointer;
    background: var(--bg-light);
    border: 1px solid var(--border-gray);
    padding: 2px 6px;
}

.global-footer {
    background: #fff;
    padding: 3rem 2rem 1.5rem;
    border-top: 1px solid var(--border-gray);
    text-align: center;
}

.footer-grid { display: flex; justify-content: center; gap: 4rem; margin-bottom: 2rem; }
.footer-bottom { font-size: 0.8rem; color: #888; border-top: 1px solid var(--border-gray); padding-top: 1.5rem; }

.output-box {
    background: #fff;
    padding: 1.5rem;
    border: 1px solid var(--border-gray);
    margin-bottom: 1.5rem;
    position: relative;
    border-radius: 4px;
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--bg-light);
    color: var(--text-dark);
    border: 1px solid var(--border-gray);
    padding: 4px 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

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