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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #1e293b;
    text-align: center;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

h1 {
    font-size: 20px;
    font-weight: 600;
    color: #475569;
    text-align: center;
    margin-bottom: 24px;
}

.subtitle {
    color: #64748b;
    font-size: 14px;
    text-align: center;
    margin-bottom: 20px;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #374151;
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"] {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group.checkbox {
    display: flex;
    align-items: center;
}

.form-group.checkbox label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-bottom: 0;
}

.form-group.checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-right: 8px;
}

.form-group.checkbox span {
    font-size: 14px;
    color: #64748b;
}

.btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: #3b82f6;
    color: #fff;
}

.btn-primary:hover {
    background: #2563eb;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.back-link {
    display: inline-block;
    color: #64748b;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 20px;
}

.back-link:hover {
    color: #3b82f6;
}

.switch-link {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
}

.switch-link a {
    color: #3b82f6;
    text-decoration: none;
}

.switch-link a:hover {
    text-decoration: underline;
}

.code-input {
    text-align: center;
    font-size: 24px !important;
    font-family: monospace;
    letter-spacing: 4px;
}

code {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
}

a {
    color: #3b82f6;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}