*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #0F1117;
    color: #E8EAF2;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 32px; background: #1A1D27;
    border-bottom: 1px solid #2E3348;
}
nav .logo { font-size: 18px; font-weight: 600; color: #4F8EF7; text-decoration: none; }
nav a, nav button {
    color: #7A7F9A; font-size: 13px; text-decoration: none;
    background: none; border: none; cursor: pointer; font-family: inherit;
}
nav a:hover, nav button:hover { color: #E8EAF2; }
nav .nav-links { display: flex; gap: 20px; align-items: center; }
main {
    flex: 1; display: flex; align-items: center; justify-content: center;
    padding: 40px 20px;
}
.card {
    background: #1A1D27; border: 1px solid #2E3348; border-radius: 12px;
    padding: 40px; width: 100%; max-width: 440px;
}
.card h1 { font-size: 22px; margin-bottom: 8px; }
.card p.sub { color: #7A7F9A; font-size: 13px; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; font-size: 10px; font-weight: 600; color: #7A7F9A;
    text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px;
}
.form-group input, .form-group select {
    width: 100%; padding: 10px 12px; border-radius: 6px;
    border: 1px solid #2E3348; background: #232738; color: #E8EAF2;
    font-size: 14px; font-family: inherit; outline: none;
}
.form-group input:focus, .form-group select:focus { border-color: #4F8EF7; }
.btn {
    display: inline-block; width: 100%; padding: 12px; border-radius: 6px;
    border: none; font-size: 14px; font-weight: 600; cursor: pointer;
    text-align: center; text-decoration: none; font-family: inherit;
}
.btn-primary { background: #4F8EF7; color: white; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background: #232738; color: #E8EAF2; border: 1px solid #2E3348; }
.btn-secondary:hover { border-color: #4F8EF7; }
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.error-text { color: #E05252; font-size: 12px; margin-top: 4px; }
.help-text { font-size: 12px; color: #7A7F9A; margin-top: 20px; text-align: center; }
.help-text a { color: #4F8EF7; text-decoration: none; }
.help-text a:hover { text-decoration: underline; }
.key-list { margin-top: 16px; }
.key-list code {
    display: block; padding: 8px 12px; margin-bottom: 6px;
    background: #232738; border-radius: 6px; font-family: monospace;
    color: #48C87A; font-size: 14px; letter-spacing: 0.5px;
}
.btn-google {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%; padding: 12px; border-radius: 6px;
    border: 1px solid #2E3348; background: #1A1D27; color: #E8EAF2;
    font-size: 14px; font-weight: 600; cursor: pointer; text-decoration: none;
    transition: 0.2s; font-family: inherit;
}
.btn-google:hover { border-color: #4F8EF7; background: #232738; }