:root {
     --accent-color: #007bff;
     --main-text-color: #333;
     --secondary-text-color: #6c757d;
     --background-light: #F4f4f4;
     --card-background: #ffffff;
     --border-color: #e9ecef;
     --error-color: #dc3545;
     --success-color: #28a745;
     --warning-color: #ffc107;
     --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.05);
     --transition-duration: 0.3s;
     --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.12),
          0 4px 6px rgba(0, 0, 0, 0.08);

     --text-color: #333;
     --item-color: #f4f6f9;
     --bg-hover: #F8F9FA;
     --border-hover: #C0C0C0;
     --text-color-btn: #111827;
     --bg-base: #FFFFFF;
     --border-base: #E0E0E0;

     --gradient-start-color: #0149ad;
     --gradient-end-color: #002d6e;
    }  
    
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    body {
        font-family: 'Inter', sans-serif;
        background-color: var(--background-light);
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        color: var(--main-text-color);
    }

    .login-container {
        position: relative;
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow-card);
    width: 90%;
    max-width: 600px;
    border: 1px solid var(--border-color);
    }

    .feedback {
        margin: 0 auto 40px auto;
        padding: 10px;
        width: 100%;
        text-align: center;
        border-radius: 5px;
        font-size: 14px;
        display: none; 
        font-weight: 500;
        transition: all 0.3s ease;
    }

    .feedback.error-message {
        background-color: #f8d7da;
        color: #721c24;
        border: 1px solid #f5c6cb;
    }

    .feedback.success-message {
        background-color: #d4edda;
        color: #155724;
        border: 1px solid #c3e6cb;
    }

    .header h2 {
        font-weight: 700;
        font-size: 2rem;
        text-align: center;
        color: var(--main-text-color);
        margin-bottom: 0.5rem;
    }

    .header p {
        color: var(--secondary-text-color);
        text-align: center;
        font-size: 0.9rem;
        margin-bottom: 32px;
    }

    .form-group {
        position: relative;
        flex: 1;
        margin-bottom: 30px;
    }

    .form-control {
        width: 100%;
        padding: 0.8rem 0.2rem;
        background-color: transparent;
        border: none;
        border-bottom: 2px solid var(--border-color);
        font-size: 1rem;
        color: var(--main-text-color);
        transition: all 0.3s ease;
    }

    .form-control:focus {
        outline: none;
        border-bottom-color: var(--gradient-start-color);
        box-shadow: none;
    }

    .form-label {
        position: absolute;
        left: 0.2rem;
        top: 0.6rem;
        color: var(--secondary-text-color);
        pointer-events: none;
        transition: all 0.3s ease;
        font-size: 1rem;
    }

    .form-control:focus+.form-label,
    .form-control:not(:placeholder-shown)+.form-label {
        top: -1rem;
        left: 0;
        font-size: 0.8rem;
        color: var(--main-text-color);
    }

    .password-toggle {
        position: absolute;
        right: 0.2rem;
        top: 0.8rem;
        transform: translateY(0);
        cursor: pointer;
        color: var(--secondary-text-color);
        font-size: 1.25rem;
        transition: color 0.3s ease;
        line-height: 1;
    }

    .password-toggle:hover {
        background: linear-gradient(135deg, #0149ad, #002d6e);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    
.options-row {
    display: flex;
    justify-content: space-between;
    align-items: center; 
    margin-bottom: 35px;
    font-size: 0.9em;
}

.left-options {
    display: flex;
    align-items: center;
    gap: 5px; 
}

.remember-me {
    display: flex; 
    gap: 6px;
    align-items: center;
}

.options-row a {
    background: linear-gradient(135deg, #0149ad, #002d6e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none; 
    position: relative; 
    font-weight: 500;
}

.options-row a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px; 
    width: 100%;
    height: 1px; 
    background: linear-gradient(135deg, #0149ad, #002d6e);
    transition: width 0.3s ease;
}

.options-row input[type="checkbox"] {
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 1px solid var(--border-base);
    border-radius: 2px;
    background-color: var(--bg-base);
    cursor: pointer;
    position: relative;
    display: inline-block;
    vertical-align: middle;
    margin: 0;
    padding: 0;
}

.options-row input[type="checkbox"]:checked::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid var(--text-color);
    border-width: 0 1px 1px 0;
    transform: rotate(45deg);
}

.btn-login {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #0149ad, #002d6e);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn-login:hover {
    background: linear-gradient(135deg, #015cc4, #003785);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-login:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
    transform: none;
}

.btn-login .custom-loader {
    width: 1.2rem;
    height: 1.2rem;
    border: 3px solid rgba(255, 255, 255, 0.4); 
    border-top-color: #fff; 
    border-radius: 50%;
    display: inline-block;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

input:is(:-webkit-autofill, :autofill) {
    -webkit-box-shadow: 0 0 0 1000px #fff inset !important;
    background-color: #ffff !important;
    -webkit-text-fill-color: #000 !important;
}

.tooltip-wrapper {
    position: relative;
    display: inline-block;
    cursor: pointer;
    margin-top: 2px;
}

.tooltip-icon {
    font-size: 16px;
    color: #6c757d;
    transition: color 0.2s;
    display: block; 
    line-height: 1; 
}

.tooltip-text {
    visibility: hidden;
    opacity: 0;   
    position: absolute;
    z-index: 10;
    bottom: 150%;
    left: 50%;
    transform: translateX(-50%); 
    width: 320px; 
    background-color: #333;
    color: #fff;
    text-align: left;
    padding: 12px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s, visibility 0.3s;
}

.tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 6px;
    border-style: solid;
    border-color: #333 transparent transparent transparent;
}

.tooltip-wrapper:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

.tooltip-wrapper:hover .tooltip-icon {
        background: linear-gradient(135deg, #0149ad, #002d6e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tooltip-text p {
    margin: 0 0 10px 0;
}

.tooltip-text p:last-child {
    margin-bottom: 0; 
}

.tooltip-text .warning-text {
    padding: 8px;
    background-color: #4a4a4a;
    border-radius: 4px;
    color: #ffc107;
    display: flex;
    align-items: center; 
    font-weight: 600; 
    font-size: 0.95em;
}

.tooltip-text .warning-icon {
    font-size: 18px;
    margin-right: 8px;
    margin-top: 0;
    color: #ffc107;
}   
    @media (max-width: 768px) {
        .login-container {
            width: 94%;
        }
    }

        @media (max-width: 468px) {
        .login-container {
            width: 92%;
        }
    }