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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: #0d1117;
    color: #c9d1d9;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

#app {
    width: 100%;
    padding: 1rem;
}

.auth-container {
    max-width: 400px;
    margin: 0 auto;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo {
    height: 80px;
    width: auto;
    margin-bottom: 1rem;
}

.auth-header h1 {
    font-size: 2.5rem;
    color: #58a6ff;
    margin-bottom: 0.5rem;
}

.tagline {
    color: #8b949e;
    font-size: 1rem;
}

.auth-panel {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 8px;
    padding: 2rem;
}

.auth-panel h2 {
    font-size: 1.25rem;
    color: #c9d1d9;
    margin-bottom: 0.5rem;
}

.auth-description {
    color: #8b949e;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    color: #8b949e;
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #c9d1d9;
    font-size: 0.9375rem;
}

.form-group input:focus {
    outline: none;
    border-color: #58a6ff;
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.form-group .hint {
    display: block;
    font-size: 0.75rem;
    color: #6e7681;
    margin-top: 0.25rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-block {
    width: 100%;
    display: block;
}

.btn-primary {
    background: #238636;
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: #2ea043;
}

.btn-secondary {
    background: #21262d;
    color: #c9d1d9;
    border: 1px solid #30363d;
}

.btn-secondary:hover:not(:disabled) {
    background: #30363d;
}

.btn-link {
    background: transparent;
    color: #58a6ff;
    padding: 0.5rem;
    width: 100%;
    text-align: center;
    margin-top: 0.5rem;
}

.btn-link:hover {
    text-decoration: underline;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: #8b949e;
    font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #30363d;
}

.auth-divider span {
    padding: 0 1rem;
}

/* Status Messages */
.status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    text-align: center;
}

.status:empty {
    display: none;
}

.status.error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.4);
    color: #f85149;
}

.status.success {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid rgba(63, 185, 80, 0.4);
    color: #3fb950;
}

.status.info {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.4);
    color: #58a6ff;
}

/* Invite Banner */
.invite-banner {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid rgba(63, 185, 80, 0.4);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.invite-banner p {
    color: #3fb950;
    font-size: 0.875rem;
    margin: 0;
}

.invite-banner .invite-email {
    color: #c9d1d9;
    font-weight: 600;
    font-size: 1rem;
    margin-top: 0.25rem;
}

.admin-badge {
    display: inline-block;
    background: #238636;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
}

/* Locked input (for invite email) */
.form-group input.locked {
    background: #161b22;
    color: #8b949e;
    cursor: not-allowed;
}

.form-group input.locked:focus {
    border-color: #30363d;
    box-shadow: none;
}

/* Browser Warning */
.browser-warning {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.4);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
}

.browser-warning h3 {
    color: #f85149;
    margin-bottom: 0.5rem;
}

.browser-warning p {
    color: #c9d1d9;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-panel {
        padding: 1.5rem;
    }

    .auth-header h1 {
        font-size: 2rem;
    }
}