body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}
.container {
    text-align: center;
    max-width: 500px;
    padding: 20px;
    width: 100%;
}
h1 {
    font-size: 24px;
    margin-bottom: 8px;
}
p {
    color: #666;
    margin-bottom: 24px;
}
.links a {
    text-decoration: none;
    color: #0066cc;
    margin: 5px;
    font-size: 14px;
    display: inline-block;
}
.links a:hover {
    text-decoration: underline;
}
.form-group {
    margin-bottom: 15px;
    text-align: left;
}
.form-control, input[type="tel"] {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
.btn {
    background-color: #059669;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
    margin-top: 5px;
}
.btn:hover {
    background-color: #047857;
}
.btn:disabled {
    background-color: #a7f3d0;
    cursor: not-allowed;
}
.btn-secondary {
    background-color: #6b7280;
}
.btn-secondary:hover {
    background-color: #4b5563;
}
.copy-btn {
    background-color: #059669;
}
.logout-btn {
    background-color: #dc2626;
}
#step-verify, #token-result, .status-container, .success-state {
    display: none;
    margin-top: 20px;
}
#error-message {
    color: #dc2626;
    margin-top: 10px;
    font-size: 14px;
}
#success-message {
    color: #059669;
    margin-top: 10px;
    font-size: 14px;
}
.info-banner, .sms-info-box {
    font-size: 13px;
    background: #f3f4f6;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
    margin-bottom: 15px;
    color: #4b5563;
    text-align: left;
}
.call-banner {
    background: #ebf8ff;
    border-left: 4px solid #3b82f6;
    padding: 15px;
    margin: 15px 0;
    text-align: center;
}
.target-phone-text, .phone-call-number {
    font-size: 24px;
    font-weight: bold;
    color: #1e3a8a;
    display: block;
    margin-top: 10px;
}
.token-box, .token-display {
    background: #ecfdf5;
    padding: 10px;
    border-radius: 4px;
    font-size: 12px;
    color: #059669;
    word-break: break-all;
    margin-top: 12px;
    text-align: left;
    border-left: 3px solid #059669;
}
.loader {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid #ccc;
    border-top-color: #059669;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 10px auto;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}