body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 24px 16px;
    background: rgb(247, 249, 252);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 420px;
    background: rgb(255, 255, 255);
    border-radius: 16px;
    box-shadow: rgba(15, 23, 42, 0.12) 0px 12px 30px;
    padding: 28px 24px;
}

.logo-container {
    text-align: center;
    margin-bottom: 20px;
}

.logo-container img {
    max-width: 200px;
    height: auto;
}

h2 {
    font-size: 20px;
    margin: 0 0 12px;
    color: #1e293b;
    text-align: center;
    font-weight: 600;
}

p {
    margin: 0 0 24px;
    color: #475569;
    font-size: 14px;
    text-align: center;
    line-height: 1.5;
}

h1 {
    font-size: 22px;
    margin: 0 0 18px;
    color: rgb(30, 41, 59);
    text-align: center;
    font-weight: 700;
}

form {
    margin-top: 20px;
}

label {
    display: block;
    margin-bottom: 6px;
    color: rgb(71, 85, 105);
    font-size: 14px;
}

input[type="tel"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgb(203, 213, 245);
    border-radius: 10px;
    font-size: 16px;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="tel"]:focus {
    border-color: rgb(99, 102, 241);
    box-shadow: rgba(99, 102, 241, 0.15) 0px 0px 0px 3px;
}

button {
    width: 100%;
    padding: 12px 16px;
    margin-top: 14px;
    background: linear-gradient(135deg, rgb(99, 102, 241), rgb(139, 92, 246));
    color: rgb(255, 255, 255);
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
}

button:active {
    transform: translateY(1px);
    box-shadow: rgba(99, 102, 241, 0.25) 0px 8px 18px;
}

button:disabled {
    background: rgb(148, 163, 184);
    cursor: not-allowed;
    opacity: 0.7;
    transform: none;
}

.form-content {
    transition: opacity 0.3s;
}

.form-content.hidden {
    display: none;
}

.error-message {
    background-color: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 0.9em;
    border: 1px solid #fcc;
    text-align: center;
}

.loading-section {
    text-align: center;
    color: rgb(30, 41, 59);
}

.spinner {
    border: 4px solid rgba(99, 102, 241, 0.3);
    border-top: 4px solid rgb(99, 102, 241);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.success-message {
    display: none;
    text-align: center;
    color: rgb(5, 150, 105);
    font-size: 18px;
    font-weight: 600;
    padding: 20px 0;
}

.success-message.show {
    display: block;
}