/* GreyPass styles - modern, clean, SEO-friendly */
:root {
    --white: #f8f9fa;
    --grey: #6c757d;
    --dark: #212529;
    --accent: #495057;
    --green: #28a745;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    color: var(--dark);
    line-height: 1.6;
}

header {
    background: var(--dark);
    color: white;
    padding: 1rem 2rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
}

.logo span { color: #adb5bd; }
.logo .zh { font-size: 1rem; margin-left: 0.5rem; }

.lang-switch a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.lang-switch a.active { background: var(--accent); }

main { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; }

.hero { text-align: center; margin-bottom: 3rem; }
.hero h1 { font-size: 2.2rem; }
.subtitle { font-size: 1.2rem; color: var(--grey); }

.spectrum {
    display: flex;
    justify-content: space-between;
    margin: 2rem 0;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
}
.spectrum div { flex: 1; display: flex; align-items: center; justify-content: center; color: white; font-weight: bold; }
.white { background: #f8f9fa; color: var(--dark); }
.grey { background: var(--grey); }
.black { background: #212529; }

.generator {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-bottom: 3rem;
}

.modes { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.mode { padding: 0.5rem 1rem; border: 1px solid var(--grey); background: white; cursor: pointer; border-radius: 6px; }
.mode.active { background: var(--dark); color: white; }

.password-output {
    font-family: monospace;
    font-size: 1.4rem;
    padding: 1.5rem;
    background: #f1f3f5;
    border-radius: 8px;
    min-height: 80px;
    word-break: break-all;
    margin: 1rem 0;
}

.actions { display: flex; gap: 1rem; flex-wrap: wrap; }
button {
    padding: 0.75rem 1.5rem;
    background: var(--dark);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button:hover:not(:disabled) { background: #000; }

.strength { margin-top: 1rem; }
.bar { height: 10px; background: #e9ecef; border-radius: 5px; overflow: hidden; }
#strengthBar { height: 100%; width: 0; background: var(--green); transition: width 0.3s; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; margin: 2rem 0; }
.card { padding: 1.5rem; border-radius: 8px; }
.card.white { background: #f8f9fa; border: 1px solid #dee2e6; }
.card.grey { background: #e9ecef; border: 1px solid var(--grey); }
.card.black { background: var(--dark); color: white; }

footer { text-align: center; padding: 2rem; color: var(--grey); background: #f8f9fa; }

@media (max-width: 600px) {
    .hero h1 { font-size: 1.6rem; }
    nav { flex-direction: column; gap: 1rem; }
}

/* tw.greypass.org fixes (tw copy only) */
.spectrum div.white { color: var(--dark); }
.modes .mode { color: var(--dark); }
.modes .mode.active { color: white; }