:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --accent-color: #E74C3C;
    --background-color: #F5F7FA;
    --text-color: #2C3E50;
    --border-color: #E1E8ED;
}

body {
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(74,144,226,0.1) 0%, rgba(44,62,80,0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.auth-container {
    width: 100%;
    max-width: 420px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    position: relative;
}

.auth-header {
    background: white !important;
    padding: 30px;
    text-align: center;
    color: var(--primary-color) !important;
}

.auth-header img {
    width: 120px;
    margin-bottom: 15px;
}

.auth-header h1, .auth-header h3 {
    font-size: 24px;
    margin: 0;
    font-weight: 500;
}

.auth-body {
    padding: 30px;
}

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

.form-floating > .form-control {
    padding: 1rem 0.75rem;
    height: calc(3.5rem + 2px);
    line-height: 1.25;
}

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

.btn-auth {
    background: var(--primary-color);
    border: none;
    padding: 12px;
    font-size: 16px;
    font-weight: 500;
    width: 100%;
    margin-top: 10px;
    transition: all 0.3s ease;
    color: white;
}

.btn-auth:hover {
    background: #357ABD;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74,144,226,0.3);
}

.links {
    margin-top: 20px;
    text-align: center;
    font-size: 14px;
}

.links a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.links a:hover {
    color: #357ABD;
}

.links .mt-2 {
    margin-top: 0.75rem !important;
    color: #666;
}

.links .fw-bold {
    font-weight: 600;
}

.alert {
    border-radius: 10px;
    margin-bottom: 20px;
}

@media (max-width: 480px) {
    .auth-container {
        margin: 10px;
    }
    
    .auth-header {
        padding: 20px;
    }
    
    .auth-body {
        padding: 20px;
    }
}

.input-group-text {
    background-color: #f8f9fa;
    border-color: var(--border-color);
    color: #6c757d;
    font-weight: 500;
    height: calc(3.5rem + 2px);
    display: flex;
    align-items: center;
    padding: 0 15px;
    font-size: 1rem;
}

.input-group .form-floating {
    display: flex;
    flex-grow: 1;
}

.input-group .form-control {
    height: calc(3.5rem + 2px);
}

.input-group .form-floating label {
    margin-left: 0.5rem;
    z-index: 5;
    height: calc(3.5rem + 2px);
    padding: 1rem 0.75rem;
    line-height: 1.25;
}