:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --error-color: #ef4444;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.brand-logo {
    display: block;
    margin: 0 auto 1.5rem auto;
    width: 64px;
    height: 64px;
}

h2 {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

button.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button.btn-primary:hover {
    background-color: var(--primary-hover);
}

.divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
    color: #6b7280;
    font-size: 0.875rem;
}

.divider::before, .divider::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background-color: #e5e7eb;
}

.divider::before { left: 0; }
.divider::after { right: 0; }

.social-login {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-social {
    width: 100%;
    padding: 0.75rem;
    background-color: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    text-decoration: none;
    box-sizing: border-box;
}

.btn-social:hover {
    background-color: #f9fafb;
}

.links {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
}

.links a {
    color: var(--primary-color);
    text-decoration: none;
}

.links a:hover {
    text-decoration: underline;
}

.error-message {
    color: var(--error-color);
    text-align: center;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    display: none;
}

.icon {
    width: 20px;
    height: 20px;
}