:root {
    --primary: #1A2E40;
    --secondary: #3D5A73;
    --accent: #A16A38;
    --light: #BEC4C8;
    --dark: #0D1C26;
    --success: #28A745;
    --card-bg: #E5E7E8;
}

body {
    font-family: 'Proxima Nova', sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Proxima Nova', sans-serif;
    font-weight: 700;
}

.course-header {
    background-color: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
}

.brand-logo {
    font-weight: 800;
    font-size: 1.8rem;
    letter-spacing: 0.5px;
    text-decoration: none;
}

.brand-capital {
    color: var(--accent);
}

.brand-friend {
    color: var(--primary);
}

.login-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--accent) 0%, #f8c48a 100%);
}

.login-title {
    color: var(--primary);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.form-control {
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.25rem rgba(242, 163, 94, 0.25);
}

.btn-primary-cf {
    background-color: var(--accent);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    width: 100%;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.btn-primary-cf:hover {
    background-color: #A16A38;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px #A16A38;
}

.alert {
    border-radius: 8px;
    margin-bottom: 1rem;
}

.form-floating>label {
    padding: 0.75rem 1rem;
}

.form-floating>.form-control {
    height: calc(3.5rem + 2px);
    line-height: 1.25;
}

.btn-google-login {
    background: #fff;
    color: #444;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.65rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.2s, border-color 0.2s;
    box-shadow: 0 2px 4px rgba(60, 64, 67, 0.08);
    text-decoration: none;
}

.btn-google-login:hover {
    background: #f7f7f7;
    border-color: #aaa;
    box-shadow: 0 4px 12px rgba(60, 64, 67, 0.13);
    color: #222;
    text-decoration: none;
}

.btn-google-login img {
    margin-right: 10px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}