/* * =================================
 * ★ শুধুমাত্র লগইন পেজের স্টাইল ★
 * =================================
 */
:root {
    --primary-color: #007bff;
    --light-gray: #f4f7f6;
    --dark-color: #212529;
    --white-color: #ffffff;
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background-color: var(--light-gray);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: 400px; /* লগইন কার্ডের জন্য ছোট প্রস্থ */
    padding: 20px; 
    box-sizing: border-box;
    margin: 0 auto; 
}

.login-card {
    background-color: var(--white-color);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid #dee2e6;
    width: 100%;
    box-sizing: border-box;
    text-align: center;
}

.login-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.login-card h2 {
    color: var(--dark-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

/* * =================================
 * লগইন ফর্ম ও বাটন
 * =================================
 */
.form-group {
    margin-bottom: 1.25rem;
    text-align: left; /* লেবেল বামে দেখানোর জন্য */
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-sizing: border-box; 
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
    outline: none;
}

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

.btn:hover {
    background-color: #0056b3; 
}

.error-message {
    color: #dc3545;
    margin-top: 1rem;
    font-size: 0.9rem;
}